THIS SHARE PURCHASE AGREEMENT is made as of November 14, 1998


BETWEEN:                    DECTRON INTERNATIONALE INC., a corporation
                            incorporated under the laws of Canada;

                            (hereinafter, "DECTRON")


AND:                        INVESTISSEMENTS NOVACAP INC., a company incorporated
                            under Part IA of the COMPANIES ACT (Quebec);

                            (hereinafter, "NOVACAP")


AND:                        9048-3140 QUEBEC INC., a company incorporated under
                            Part 1A of the COMPANIES ACT (Quebec);


AND:                        HARRY TOPIKIAN, businessman, residing and domiciled
                            at 5037 Notre-Dame, Laval, Province of Quebec;


AND:                        NICK AGOPIAN, businessman, residing and domiciled at
                            26 Malard, Dollard-des-Ormeaux, Province of Quebec;


AND:                        BRIAN MONK, businessman, residing and domiciled at
                            2300 Ward, Condo 207, St-Laurent, Province of
                            Quebec;


                            (Novacap, 9048-3140 Quebec inc., Harry Topikian,
                            Nick Agopian and Brian Monk are hereinafter
                            collectively referred to as the "VENDORS")


WHEREAS Cascade Technologies Inc. ("CASCADE") is a company incorporated under
Part IA of the COMPANIES ACT (Quebec);

WHEREAS the authorized capital of Cascade consists of an unlimited number of
Class A shares, Class B shares, Class C shares, Class E shares and Class F
shares and of 305,270 Class D shares of which 1,000,000 Class A shares, 617,296
Class C shares, 305,270 Class D shares and 208,843 Class E shares are issued and
outstanding as fully-paid shares;






                                      - 2 -

WHEREAS Dectron wishes to purchase, and the Vendors desire to sell, directly and
indirectly, all but not less than all of the issued and outstanding shares of
every class of Cascade;

IN CONSIDERATION of the mutual covenants in this Agreement, and of other
consideration (the receipt and sufficiency of which are acknowledged by each of
Dectron and the Vendors), they agree as follows.


                                    ARTICLE 1
                                 INTERPRETATION

1.1      DEFINITIONS.  In this Agreement,

         "AFFILIATE" has the meaning ascribed to such term by subsection 1(4) of
         the CANADA BUSINESS CORPORATIONS ACT;

         "AGREEMENT" means this agreement to purchase shares including all
         attached schedules, as the same may be supplemented, amended, restated
         or replaced from time to time;

         "ARTICLES" means the respective articles of incorporation, amendment,
         continuance and/or amalgamation, as the case may be, of Cascade or of
         its Subsidiaries;

         "ASSETS" means all of the assets, real and personal, tangible and
         intangible, and undertaking of Cascade or of its Subsidiaries, as the
         case may be;

         "BOOKS AND RECORDS" means the accounting records and all books,
         records, books of account, sales and purchase records, lists of
         suppliers and customers, business reports and research and development
         information of Cascade and each of the Subsidiaries, including without
         limitation, all data and information stored electronically or on
         computer related media;

         "BUSINESS" means the business carried on by P.M. Wright Ltd.,
         consisting in the manufacturing, distribution and servicing of heating,
         ventilation and air purification systems;

         "BUSINESS DAY" means a day other than a Saturday or Sunday and on which
         most Canadian chartered banks are open for the transaction of domestic
         business in Montreal, Quebec;

         "CLAIMS" means any domestic or foreign demand, action, cause of action,
         damage, loss, cost, liability, expense or requirements, governmental or
         otherwise, including the cost of legal representation in respect
         thereof and any interest or penalty arising in connection therewith;






                                      - 3 -

         "CLOSING" means the completion of the sale to, and purchase by, Dectron
         of, the Shares and the completion of all other transactions
         contemplated by this Agreement which are to occur contemporaneously
         with the purchase and sale of the Shares;

         "CLOSING DATE" means December 4, 1998, or such other Business Day as
         the Parties agree in writing as the date that the Closing shall take
         place;

         "CLOSING TIME" means 10:00 a.m. on the Closing Date or such other time
         on that date as the Parties agree in writing that the Closing shall
         take place;

         "DATA ROOM" means the data room referred to in Section 7.3;

         "EMPLOYEES" means the employees of the Business;

         "ENCUMBRANCE" means any security interest, mortgage, lien, hypothec,
         pledge, security by way of assignment, charge, deemed trust or a voting
         trust or pooling or any other shareholders agreement with respect to
         securities, an adverse claim or any other right or option, affecting
         the Assets or the Shares;

         "ENVIRONMENTAL LAWS" means all federal, provincial or municipal
         statutes, regulations, by-laws, or policies and orders of any
         Governmental Authority, having the force of law, relating in whole or
         in part to the protection of the environment;

         "FINANCIAL STATEMENTS" means (i) the audited consolidated financial
         statements of Cascade for the fiscal year ended April 30th, 1998,
         consisting of a balance sheet, statement of earnings and retained
         earnings, statement of changes in financial position, the notes thereto
         and the report of the auditor thereon, and (ii) the unaudited interim
         financial statements of Cascade for the five-month period from May 1st,
         1998 to September 30th, 1998 inclusively, consisting of a balance
         sheet, statement of income and retained earnings, copies of which are
         attached as Schedule 3.6;

         "GENERALLY ACCEPTED ACCOUNTING PRINCIPLES" means generally accepted
         accounting principles from time to time approved by the Canadian
         Institute of Chartered Accountants, or any successor institute,
         applicable as at the date on which any calculation or determination is
         required to be made in accordance with generally accepted accounting
         principles, and where the Canadian Institute of Chartered Accountants
         includes a recommendation in its Handbook concerning the treatment of
         any accounting matter, such recommendation shall be regarded as the
         only generally accepted accounting principle applicable to the
         circumstances that it covers;

         "GOVERNMENTAL AUTHORITY" means any government whether federal,
         provincial or municipal and any governmental agency, governmental
         authority, governmental tribunal or governmental commission of any kind
         whatever;





                                      - 4 -

         "INCLUDING" means "including without limitation" and the term
         "including" shall not be construed to limit any general statement which
         it follows to the specific or similar items or matters immediately
         following it;

         "LICENCE" means any licence, permit approval, right, privilege,
         concession or franchise issued, granted, conferred or otherwise created
         by a Governmental Authority;

         "MATERIAL CONTRACTS" has the meaning set forth in Schedule 7.3;

         "PERMITTED ENCUMBRANCES" means:

         (a)      inchoate or statutory liens for taxes or utility rates or
                  charges not at the time overdue;

         (b)      inchoate or statutory liens for overdue taxes or utility rates
                  or charges the validity of which Cascade or the Subsidiaries
                  is contesting in good faith but only for so long as such
                  contestation effectively postpones enforcement of any such
                  liens taxes or utility rates or charges;

         (c)      statutory liens incurred or deposits made in the ordinary
                  course of business in connection with worker's compensation,
                  unemployment insurance and similar legislation;

         (d)      liens and privileges arising out of any judgment with respect
                  to which Cascade or the Subsidiaries intends to prosecute an
                  appeal or proceedings for review but only for so long as there
                  is a stay of execution pending the determination of such
                  appeal or proceedings for review;

         (e)      security given by Cascade or the Subsidiaries to a public
                  utility or any Governmental Authority when required in the
                  ordinary course of business; and

         (f)      construction or repair or storage liens arising in the
                  ordinary course of business which are not overdue or which are
                  being contested in good faith;

         any such overdue taxes or utility rates or charges that are contested,
         any such judgment giving rise to any liens or privileges, any such
         security given to public utilities and any such construction repair or
         storage liens, that are known to the Vendors, shall be disclosed in
         Schedule 3 hereto;

         "PERSON" shall be broadly interpreted and includes an individual, body
         corporate, partnership, Joint venture, trust, association,
         unincorporated organization, the Crown, any Governmental Authority or
         any other entity recognized by law;






                                      - 5 -

         "PRIME RATE" for any day means the rate of interest expressed as a rate
         per annum that the National Bank of Canada establishes at its head
         office in Montreal, Quebec as the reference rate of interest that it
         shall charge on that day for Canadian dollar demand loans to its
         customers in Canada and which it at present refers to as its prime
         rate;

         "PURCHASE PRICE" means the purchase price to be paid by Dectron for the
         Shares as provided in Section 2.2;

         "SUBSIDIARIES" means the subsidiaries (as such term is understood in
         the CANADA BUSINESS CORPORATIONS ACT) of Cascade, namely P.M. Wright
         Ltd., Purafil Canada Ltee and 122248 Canada Inc.;

         "SHARES" means all of the issued and outstanding shares in the share
         capital of Cascade, namely the outstanding shares specified in the
         preamble hereto;

1.2      GENERALLY ACCEPTED ACCOUNTING PRINCIPLES. All accounting and financial
         terms used herein, unless specifically provided to the contrary, shall
         be interpreted and applied in accordance with Generally Accepted
         Accounting Principles.

1.3      PREAMBLE AND SCHEDULES. The Preamble and Schedules to this Agreement
         form an integral part hereof. All Schedules shall form an integral part
         of the Data Room and shall as well be subject to the due diligence
         review.

1.4      HEADINGS. The division of this Agreement into articles, sections,
         subsections and schedules and the insertion of headings are for
         convenience of reference only and shall not affect the construction or
         interpretation of this Agreement. The article, section, subsection and
         schedule headings in this Agreement are not intended to be full or
         precise descriptions of the text to which they refer and are not to be
         considered part of this Agreement. All uses of the words "hereto",
         "herein", "hereof", "hereby" and "hereunder" and similar expressions
         refer to this Agreement and not to any particular section or portion of
         it. References to an Article, Section, Subsection or Schedule refer to
         the applicable article, section, subsection or schedule of this
         Agreement.

1.5      NUMBER AND GENDER. In this Agreement, words in the singular include the
         plural and vice-versa and words in one gender include all genders.

1.6      ENTIRE AGREEMENT. This Agreement constitutes the entire agreement
         between the Parties pertaining to the subject matter hereof and
         supersedes all prior agreements, negotiations, discussions and
         understandings, written or oral, between the Parties in respect of the
         purchase and sale of the Shares. There are no representations,
         warranties, conditions, other agreements or acknowledgements, whether
         direct or collateral, express or implied, that form part of or affect
         this Agreement, or which induced any party to enter into this Agreement
         or





                                      - 6 -

         on which reliance is placed by any party, except as specifically set
         forth in this Agreement or in the Closing Documents.

1.7      AMENDMENT. This Agreement may be amended, modified or supplemented only
         by a written agreement signed by each party.

1.8      WAIVER OF RIGHTS. Any waiver of, or consent to depart from the
         requirements of any provision of this Agreement shall be effective only
         if it is in writing and signed by the party giving it, and only in the
         specific instance and for the specific purpose for which it has been
         given. No failure on the part of any party to exercise, and no delay in
         exercising, any right under this Agreement shall operate as a waiver of
         such right. No single or partial exercise of any such right shall
         preclude any other or further exercise of such right or the exercise of
         any other right.

1.9      APPLICABLE LAW. This Agreement shall be governed by, and interpreted
         and enforced in accordance with, the laws in force in the Province of
         Quebec (excluding any conflict of laws, rule or principle which might
         refer such interpretation to the laws of another jurisdiction). Each
         party irrevocably submits to the non-exclusive jurisdiction of the
         courts of Quebec with respect to any matter arising hereunder or
         related hereto.

1.10     CURRENCY. Unless specified otherwise, all statements of or references
         to dollar amounts in this Agreement are to lawful money of Canada.

1.11     PERFORMANCE ON HOLIDAYS. If any action is required to be taken pursuant
         to this Agreement on or by a specified date which is not a Business
         Day, then such action shall be valid if taken on or by the next
         succeeding Business Day.

1.12     CALCULATION OF TIME. In this Agreement, a period of days shall be
         deemed to begin on the first day after the event which began the period
         and to end at 6:00 p.m. (Montreal time) on the last day of the period.
         If, however, the last day of the period does not fall on a Business
         Day, the period shall terminate at 6:00 p.m. (Montreal time) on the
         next Business Day.

1.13     THIRD PARTY BENEFICIARIES. Nothing in this Agreement or in any Closing
         Document is intended expressly or by implication to, or shall, confer
         upon any Person other than the Parties, any rights or remedies of any
         kind.







                                      - 7 -

                                    ARTICLE 2
                           PURCHASE AND SALE OF SHARES

2.1      PURCHASE AND SALE OF SHARES. Dectron agrees to purchase the Shares and
         the Vendors agree to sell and transfer their Shares to Dectron on the
         Closing Time and subject to the terms and conditions of this Agreement.

2.2      PURCHASE PRICE. The Purchase Price for the Shares is Three Million Five
         Hundred Thousand Dollars ($3,500,000), payable in full by bank draft or
         wire transfer of funds on the Closing Time. The Purchase Price shall be
         apportioned and paid to the Vendors pursuant to Schedule 2.2.


                                    ARTICLE 3
                  REPRESENTATIONS AND WARRANTIES OF THE VENDORS

The Vendors jointly represent and warrant to Dectron as set out in the following
Subsections of this Section and acknowledge that Dectron is relying upon such
representations and warranties in entering into this Agreement. Dectron
acknowledges that the representations and warranties of the Vendors set forth in
this Article 3 are qualified by the information disclosed in or referred to in
this Agreement and in Schedule 3 ("Disclosure Schedule") hereto.

3.1      CORPORATE MATTERS.

         3.1.1    Cascade is a company amalgamated and existing under the laws
                  of the province of Quebec, and no proceedings have been taken
                  or authorized by Cascade with respect to (i) the bankruptcy,
                  insolvency, liquidation, dissolution or winding up of Cascade
                  or any of the Subsidiaries, or (ii) with respect to any
                  amalgamation, merger, consolidation, arrangement or
                  reorganization relating to Cascade or any of the Subsidiaries.

         3.1.2    Cascade has no subsidiaries other than the Subsidiaries, each
                  being a corporation incorporated under the CANADA BUSINESS
                  CORPORATIONS ACT. All of the issued and outstanding shares of
                  the Subsidiaries are held by Cascade, except for one (1)
                  preferred share of P.M. Wright Ltd. held by 122248 Canada Inc.
                  (which is a wholly-owned subsidiary of Cascade), in each case
                  by good and marketable title, free and clear of all
                  Encumbrances.

         3.1.3    Each of Cascade and its Subsidiaries has the corporate power
                  and capacity to own or lease its Assets and to carry on its
                  business as at present carried on. Cascade's and 122248 Canada
                  Inc.'s businesses are limited to the holding of shares in P.M.
                  Wright Ltd. and Purafil Canada Ltee does not carry on
                  business. P.M. Wright Ltd. possesses all Licences material to
                  the conduct of the Business. Neither the nature of the





                                      - 8 -

                  Business nor the location or character of any of the Assets
                  requires Cascade or the Subsidiaries to be registered,
                  licensed or otherwise qualified as an extra-provincial or
                  foreign corporation or to be in good standing in any
                  jurisdiction other than jurisdictions where they are duly
                  registered, licensed or otherwise qualified for such purpose
                  and as such are in good standing pursuant thereto.

         3.1.4    This Agreement has been duly executed and delivered by each of
                  the Vendors and constitutes a valid and binding obligation of
                  each of the Vendors enforceable against each of the Vendors in
                  accordance with its terms.

         3.1.5    A true copy of the Articles and all by-laws of each of Cascade
                  and the Subsidiaries, which constitute all of their respective
                  constating documents and by-laws, shall be provided in the
                  Data Room.

         3.1.6    The corporate records of each of Cascade and the Subsidiaries
                  to be provided in the Data Room shall reflect all material
                  resolutions passed by the directors and shareholders of each
                  of Cascade and the Subsidiaries for the period covered by
                  these corporate records, which shall be for a minimum of four
                  (4) years.

3.2      AUTHORIZED AND ISSUED CAPITAL OF CASCADE. The authorized capital and
         the issued and outstanding shares of Cascade immediately prior to the
         Closing is as described in the preamble hereto, all of which shares
         have been validly issued and are outstanding as fully paid and
         non-assessable shares.

3.3      TITLE TO SHARES. Each of the Vendors has good and marketable title to
         the Shares registered in his or its name (as the case may be), free and
         clear of all Encumbrances. The Shares shall constitute all of the
         issued and outstanding shares of Cascade. On the Closing Date, there
         shall be no restrictions on the transfer of the Shares except those set
         forth in Cascade's Articles.

3.4      ABSENCE OF CONFLICTING AGREEMENTS. None of the execution and delivery
         of, or the observance and performance by the Vendors of, any covenant
         or obligation under this Agreement or pursuant to or in connection with
         the Closing:

         3.4.1    contravenes or results in, or will contravene or result in, a
                  violation of or a default under (with or without the giving of
                  notice or lapse of time, or both) or in the acceleration of
                  any obligation under:

                  (a)      the Articles or directors or shareholders resolutions
                           of Cascade or of the Subsidiaries; or

                  (b)      the provisions of any Material Contract to which
                           Cascade or P.M. Wright Ltd. is a party, or by which
                           it or its material Assets may be bound or affected.





                                      - 9 -

3.5      CONSENTS, APPROVALS. To the best of the Vendors' knowledge, no consent,
         approval, authorization, registration, declaration or filing with any
         Governmental Authority is required by the Vendors or Cascade in
         connection with the execution and delivery by the Vendors of this
         Agreement, or the observance and performance by the Vendors of their
         obligations under this Agreement.

3.6      FINANCIAL STATEMENTS. The Financial Statements have been prepared in
         accordance with Generally Accepted Accounting Principles, applied on a
         basis consistent with that of the preceding periods, and present fairly
         the assets, liabilities (whether accrued, absolute, contingent or
         otherwise) and financial condition of Cascade and each of the
         Subsidiaries and the results of the operations of Cascade and each of
         the Subsidiaries, as at the dates thereof and for the periods covered
         thereby. No information has become available to the Vendors or Cascade
         that would render the Financial Statements materially and adversely
         incomplete or inaccurate.

3.7      UNDISCLOSED LIABILITIES. Neither Cascade nor any of the Subsidiaries
         has any material liabilities except liabilities disclosed or provided
         for in the Financial Statements and liabilities incurred in the
         ordinary course of business since September 30, 1998, which are
         consistent with past practice, are not, in the aggregate, material and
         adverse to Cascade or the Shares, or to the Business and do not
         materially violate any covenant contained in this Agreement or
         constitute a material breach of any representation or warranty made in
         or pursuant to this Agreement.

3.8      ABSENCE OF CHANGES.  Since September 30, 1998:

         3.8.1    P.M. Wright Ltd. has conducted the Business in the ordinary
                  course and has used its best efforts to preserve the Business
                  and the Assets;

         3.8.2    there has not been any change in the condition of the Business
                  other than changes in the ordinary course of business and such
                  changes have not, either individually or in the aggregate,
                  been materially adverse and have not had a material adverse
                  effect on the condition of the Business; and

         3.8.3    there has not been any damage, destruction, loss, labour
                  dispute or other event, development or condition of any
                  character (whether or not covered by insurance) which has had
                  a material adverse affect on Cascade, P.M. Wright Ltd. or the
                  condition of the Business.

3.9      ABSENCE OF UNUSUAL TRANSACTIONS. Since September 30, 1998, neither
         Cascade nor the Subsidiaries has, other than in the ordinary course of
         business:

         (a)      transferred, assigned, sold or otherwise disposed of any of
                  the Assets;






                                     - 10 -

         (b)      made any material change in the method of billing customers or
                  the credit terms made available by the Business to customers
                  of the Business;

         (c)      increased the compensation paid or payable to the Employees or
                  increased the benefits to which such Employees are entitled
                  under any benefit plan or created any new benefit plan for any
                  such Employees nor has there been the creation of any new
                  executive managerial position;

         (d)      entered into, modified, amended or terminated any Material
                  Contract;

         (e)      issued or sold any of its shares or other securities or
                  issued, granted or delivered any right, option or other
                  commitment for the issuance of any such securities;

         (f)      declared or paid any dividend or other distribution in respect
                  of any shares in its capital or purchased or redeemed any such
                  shares.

3.10     TAX MATTERS. Cascade and each of the Subsidiaries has prepared and
         filed all its income and goods and services tax ("Taxes") returns
         substantially on time and with all appropriate Governmental Authorities
         for all fiscal periods ending prior to the date hereof. Each such tax
         return was correct and complete in all material respects.

         Cascade and each of the Subsidiaries has paid all Taxes due and payable
         by it as reflected on said tax returns and has paid all assessments and
         reassessments it has received in respect of same. The provisions for
         Taxes reflected in the Financial Statements are sufficient to cover all
         liabilities for Taxes that have been assessed against Cascade and each
         of the Subsidiaries or that are accruing due in respect of the
         Business, during the periods covered by the Financial Statements and
         all prior periods. Except to the extent provided for in the Financial
         Statements, none of Cascade or the Subsidiaries is liable for any Taxes
         at the date hereof or for the payment of any instalment in respect of
         Taxes due in respect of its current taxation year up to the date hereof
         and, except as aforesaid, no such Taxes are required to be provided
         for.

         There are no reassessments of Taxes that have been issued and are
         outstanding and Cascade is not aware of any pending or threatened
         assessment or reassessment for Taxes. None of Cascade or the
         Subsidiaries has executed or filed with any Governmental Authority any
         agreement extending the period for assessment, reassessment or
         collection of any Taxes.

         None of the Vendors is a non-resident of Canada, as defined in the
         INCOME TAX ACT (Canada). Cascade and each of the Subsidiaries is a
         Canadian controlled private corporation, as defined in the INCOME TAX
         ACT (Canada).

3.11     CONTRACTS. Except for the Material Contracts to be provided in the Data
         Room, neither Cascade nor P.M. Wright Ltd. is a party to or bound by
         any Material Contract, whether oral





                                     - 11 -

         or written. The Material Contracts are all in full force and effect
         with no amendments and contain no change of corporate control provision
         that will not have been waived by the Closing Date. Each of Cascade and
         the Subsidiaries has complied with all material terms thereof, has paid
         all amounts due thereunder, has not waived any material rights
         thereunder and no material default or breach exists in respect thereof
         on the part of any of the parties thereto and no event has occurred
         which, after the giving of notice or the lapse of time or both, would
         constitute such a material default or breach.

3.12     BANK ACCOUNTS; ABSENCE OF GUARANTEES. Attached as Schedule 3.12 hereto
         is a list of all accounts maintained by Cascade and the Subsidiaries
         with any financial institution as well as the complete list of the
         names of persons exercising signing authority thereunder and details as
         to their respective signing authority thereunder. Neither Cascade nor
         the Subsidiaries has given or agreed to give, or is a party to or bound
         by, any guarantee of indebtedness or other obligations of third parties
         or any other commitment by which Cascade or any of the Subsidiaries is,
         or is contingently, responsible for such indebtedness or other
         obligations.

3.13     RESTRICTIONS ON BUSINESS. Neither Cascade nor the Subsidiaries is a
         party to any agreement, lease, mortgage, security document, obligation
         or instrument, limiting its right to conduct any business.

3.14     COMPLIANCE WITH APPLICABLE LAW. To the best of the Vendors' knowledge,
         P.M. Wright Ltd. is conducting its Business in compliance with all
         material applicable laws, and not in breach of any material provision
         of any applicable law, except for breaches which in the aggregate are
         not material.

3.15     COLLECTIVE AGREEMENTS. Neither Cascade nor the Subsidiaries is a party
         to any Collective Agreement. No trade union, council of trade unions,
         employee bargaining agency or affiliated bargaining agent holds
         bargaining rights with respect to any of the Employees by way of
         certification, interim certification, voluntary recognition, or
         successor rights. To the best of knowledge of Vendors, there are no
         current threatened or pending union organizing activities involving the
         Employees.

3.16     LITIGATION. There is no material pending claim, demand, suit, action,
         cause of action, litigation, investigation, grievance, arbitration or
         governmental proceeding, including appeals and applications for review,
         in progress against, by or relating to Cascade or the Subsidiaries, or
         adversely affecting the Shares, the Assets or the Business, nor to the
         best of the knowledge of the Vendors are any of the same threatened.

3.17     ASSETS. Except for Permitted Encumbrances and as disclosed in the
         Financial Statements or elsewhere in this Agreement, P.M. Wright Ltd.
         has good and marketable title to all of its Assets free and clear of
         all Encumbrances.






                                     - 12 -

3.18     INTELLECTUAL PROPERTY RIGHTS. Schedule 3.18 sets forth a true and
         complete list of all registered patents and trademarks owned or held by
         Cascade or P.M. Wright Ltd. These intellectual property rights are
         owned by or validly licensed to Cascade or P.M. Wright Ltd. To the best
         knowledge of the Vendors, all registrations and filings necessary to
         preserve the rights of Cascade or P.M. Wright Ltd. in said intellectual
         property rights described in Schedule 3.18 have been made in the
         jurisdictions mentioned in Schedule 3.18 and the Vendors are not aware
         of any material infringement of, or other material interference with
         said intellectual property rights by third parties or any claim by any
         Person that any of these intellectual property rights are, or may be,
         invalid or unenforceable. The shareholders hereby confirm that if any
         of them hold Intellectual Property Rights of Cascade or its
         Subsidiaries in their name or in the name of an affiliate of them, they
         hereby renounce, and will cause any such affiliate to renounce, to any
         proprietary claim to such Intellectual Property Rights and agree to
         execute any documentation that may be reasonably required to effect a
         transfer of their rights to Cascade or any of its Subsidiaries.

3.19     ENVIRONMENTAL MATTERS. P.M. Wright Ltd. possesses the Environmental
         permits listed in Schedule 3.19, and all of which are in full force and
         effect and, to the best of the Vendors' knowledge, have been complied
         with in all material respects. There are no proceedings in progress, or
         to the knowledge of the Vendors, Cascade or the Subsidiaries pending or
         threatened, which may result in the cancellation, revocation,
         suspension, or modification of any said Environmental permit. To the
         best of the Vendors' knowledge, neither the Subsidiaries nor Cascade
         has been charged with or convicted of an offence for non-compliance
         with or breach of any Environmental Law nor have the Subsidiaries or
         Cascade been fined or otherwise sentenced for non-compliance with or
         breach of any Environmental Law, and neither the Subsidiaries nor
         Cascade is under investigation related to any breach or alleged breach
         of or non-compliance with any Environmental Law.

3.20     MAJOR SUPPLIERS AND CUSTOMERS. To the best knowledge of the Vendors, no
         major supplier or customer has indicated its intention to change its
         relationship or any material terms upon which it will conduct business
         with Cascade or the Subsidiaries in the future


                                    ARTICLE 4
                    REPRESENTATIONS AND WARRANTIES OF DECTRON

         Dectron hereby represents and warrants to the Vendors as set out in the
following Subsections of this Section and acknowledges that the Vendors are
relying upon such representations and warranties in entering into this
Agreement. The Vendors acknowledge that the representations and warranties of
Dectron set forth in this Article 4 are qualified by the information disclosed
in or referred to in this Agreement.

4.1      CORPORATE MATTERS. Dectron is a corporation duly incorporated,
         organized, and validly existing in good standing under the laws of its
         jurisdiction of incorporation. No proceedings





                                     - 13 -

         have been taken or authorized by Dectron or, to the best of Dectron's
         knowledge, by any other Person, with respect to the bankruptcy,
         insolvency, liquidation, dissolution or winding up of Dectron.

4.2      CORPORATE POWER AND DUE AUTHORIZATION. Dectron has the corporate power
         and capacity to execute and deliver, and to observe and perform its
         covenants and obligations under, this Agreement. Dectron has taken all
         corporate action necessary to authorize the execution and delivery of,
         and the observance and performance of its covenants and obligations
         under this Agreement.

4.3      ABSENCE OF CONFLICTING AGREEMENTS. None of the execution and delivery
         of, or the observance and performance by Dectron of, any covenant or
         obligation under this Agreement contravenes or results in (with or
         without the giving of notice or lapse of time, or both) or will
         contravene or violate in any material respect or result in any material
         breach or default of, or acceleration of any obligation under the
         articles, by-laws, directors' or shareholders' resolutions of Dectron,
         or any agreement, lease, mortgage, security document, obligation or
         instrument to which Dectron is a party or by which Dectron or its
         assets is affected or bound.

4.4      ENFORCEABILITY OF OBLIGATIONS. This Agreement has been duly executed
         and delivered by Dectron, and this Agreement constitutes a valid and
         binding obligation of Dectron enforceable against Dectron in accordance
         with its terms.

4.5      CONSENTS AND APPROVALS. No consent, approval, authorization,
         registration, declaration or filing with any Governmental Authority is
         required by Dectron in connection with the execution and delivery by
         Dectron of this Agreement, or the observance and performance by Dectron
         of its obligations under this Agreement, except for the filing of a
         copy of this Agreement in accordance with US Securities Exchange
         Commission requirements, if any.


                                    ARTICLE 5
                   SURVIVAL OF REPRESENTATIONS AND WARRANTIES

5.1      SURVIVAL OF REPRESENTATIONS AND WARRANTIES OF THE PARTIES. All
         representations and warranties made by the Parties in this Agreement
         shall survive the Closing for a period of two (2) years after the
         Closing Date except for the representation and warranty set forth in
         Section 3.10, which shall survive until the expiry of the last day upon
         which any Governmental Authority may, in the absence of fraud or any
         misrepresentation that is attributable to neglect, carelessness or
         wilful default, issue an assessment for Taxes owing by Cascade in
         respect of a period ending on or prior to the Effective Time.

         After the expiration of such time periods, the Parties shall have no
         further liability hereunder with respect to such representations and
         warranties except with respect to claims properly made within such time
         periods.





                                     - 14 -


                                    ARTICLE 6
                                 INDEMNIFICATION

6.1      INDEMNIFICATION FOR BREACHES OF REPRESENTATIONS AND WARRANTIES. The
         Vendors agree with Dectron and Dectron agrees with the Vendors (the
         party agreeing to indemnify another party being called the
         "INDEMNIFYING PARTY" and the party to be indemnified being called the
         "INDEMNIFIED PARTY") to indemnify and save harmless the Indemnified
         Party, effective as and from the Closing Time, from and against any
         Claims which may be made or brought against the Indemnified Party or
         which it may suffer or incur as a result of, in respect of, or arising
         out of any non-fulfilment of any covenant or agreement on the part of
         the Indemnifying Party under this Agreement or any closing document or
         any incorrectness in or breach of any representation or warranty of the
         Indemnifying Party contained herein or in any closing document. Any
         amount which an Indemnifying Party is liable to pay to an Indemnified
         Party pursuant to this Section 6.1 shall bear interest at a rate per
         annum equal to the Prime Rate, calculated and payable monthly, both
         before and after judgment, from the date the Indemnified Party
         disbursed funds, suffered damages or losses or incurred a loss,
         liability or expense in respect of a Claim, to the date of payment by
         the Indemnifying Party to the Indemnified Party. Any amount which an
         Indemnifying Party is required to pay to an Indemnified Party pursuant
         to this Section 6.1 (including interest thereon) is called an
         "INDEMNIFIED LOSS". The foregoing obligation of indemnification in
         respect of such Claims shall be subject to the time limitation set
         forth in Sections 5.1 and ? hereof respecting the survival of the
         representations and warranties of the parties.

6.2      THIRD PARTY CLAIMS. If a Claim is made against an Indemnified Party by
         a third party for which the Indemnified Party may be entitled to
         indemnification under Section 6.1, the Indemnified Party shall give
         notice (the "INDEMNITY NOTICE") to the Indemnifying Party specifying
         the particulars of such claim within 30 days after it receives
         notification of the Claim. Failure to give such notice within such time
         period shall not prejudice the rights of an Indemnified Party except to
         the extent that the failure to give such notice materially adversely
         affects the ability of the Indemnifying Party to defend the Claim or to
         cure the breach or incorrectness of the representation, warranty,
         covenant or agreement giving rise to the Claim. The Indemnifying Party
         shall have the right to participate in any negotiations or proceedings
         with respect to such Claim at its own expense. The Indemnified Party
         shall not settle or compromise any such Claim without the prior written
         consent of the Indemnifying Party, unless the Indemnifying Party has
         not, within seven Business Days after the giving of the Indemnity
         Notice, given notice to the Indemnified Party that it wishes to dispute
         such Claim. If the Indemnifying Party does give such a notice, it shall
         have the right at its own cost and expense to assume the defence of
         such Claim and to defend such Claim in the name of the Indemnified
         Party. The Indemnified Party shall provide to the Indemnifying Party
         access to all files, books, records and other information in its
         possession or control which may be relevant to the defence of such
         Claim. The Indemnified Party shall co-operate in all reasonable
         respects in the defence of such Claim but at the expense of the
         Indemnifying





                                     - 15 -

         Party. If the Indemnifying Party fails, after the giving of such
         notice, diligently and reasonably to defend such Claim throughout the
         period that such Claim exists, its right to defend the Claim shall
         terminate and the Indemnified Party may assume the defence of such
         Claim at the sole expense of the Indemnifying Party. In such event, the
         Indemnified Party may compromise or settle such Claim, without the
         consent of the Indemnifying Party. The Indemnifying Party agrees to
         make all reasonable efforts to assist the Indemnified Party to defend
         or settle any Claim, with services billed at normal rates of
         remuneration.

6.3      Notwithstanding Sections 6.1 and 6.2, the Vendors' obligation to
         indemnify Dectron shall be limited to Claims which individually exceed
         the sum of $ 5,000 per claim and which in the aggregate exceed the sum
         of $ 125,000 and the Vendors' liability towards Dectron shall be joint,
         in proportion to their respective holdings percentage of Class A shares
         sold to Dectron pursuant to this Agreement, and shall not, in the
         aggregate, exceed the Purchase Price.


                                    ARTICLE 7
                         CONDITIONS PRECEDENT TO CLOSING

7.1      CONDITIONS FOR THE BENEFIT OF DECTRON. The sale by the Vendors and the
         purchase by Dectron of the Shares is subject to the following
         conditions, which are for the exclusive benefit of Dectron and which
         are to be performed or complied with at or prior to the Closing Time:

         7.1.1    the Vendors shall have performed or complied with all of the
                  covenants contained in this Agreement to be performed or
                  complied with by the Vendors at or prior to the Closing Time;

         7.1.2    Dectron shall have completed its due diligence review of the
                  Seller, Cascade and the Subsidiaries in accordance with
                  Section 7.3 hereof and, acting reasonably, be satisfied with
                  the results thereof;

         7.1.3    the indebtedness of Cascade to Novacap in the amount of
                  $500,000, as well as any other indebtedness owing to Cascade
                  by any director, officer or shareholder of Cascade or any of
                  the Subsidiaries or owing by Cascade to any such Person, shall
                  be reimbursed in full, including without limitation as to
                  principal, interest, fees and penalties (if any), at or before
                  the Closing;

         7.1.4    no action or proceeding in Canada, domestic or foreign, will
                  be pending or threatened by any person or Governmental Agency
                  to enjoin, restrict or prohibit the sale and purchase of the
                  Shares contemplated hereby;






                                     - 16 -

         7.1.5    all consents, approvals, Orders and authorizations of any
                  Person or Governmental Authorities (or registrations,
                  declarations, filings or recordings with any of them),
                  required for the Closing (other than routine post-closing
                  notifications or filings), shall have been obtained or made on
                  or before the Closing Time;

         7.1.6    at the Closing Time, all directors of Cascade and each of the
                  Subsidiaries shall submit a resignation from all positions
                  with Cascade and each of the Subsidiaries, and a release by
                  each of them as well as the Vendors of all claims against
                  Cascade and each of the Subsidiaries up to the Closing Time
                  except for any matters for which such director is entitled to
                  indemnity under the by-laws of Cascade and each of the
                  Subsidiaries and any insurance related thereto; furthermore,
                  Mr. Marcel Patenaude shall have resigned his positions with
                  Cascade and its Subsidiaries on the terms agreed upon
                  concurrently hereto;

         7.1.7    at Closing, the Vendors shall deliver or cause to be delivered
                  to Dectron share certificates representing the Shares duly
                  endorsed by the Vendors for transfer, or accompanied by
                  irrevocable security transfer powers of attorney duly
                  executed, which shall be returned to Cascade against delivery
                  of one or more new share certificates representing the Shares
                  issued by Cascade to Dectron and evidence that Dectron has
                  been entered on the books of Cascade as the sole holder of the
                  Shares; and 9048-3140 Quebec Inc. shall deliver to Dectron
                  satisfactory evidence confirming Cascade Technologies
                  (Industriel) Inc. has changed its corporate name to a name
                  that does not include reference to Cascade or a derivative or
                  similarity thereof; furthermore, the Vendors shall provide to
                  Dectron a legal opinion on Cascade and P. M. Wright Ltd.'s
                  corporate status in a reasonable form and content;

         7.1.8    the representations and warranties contained in Article 3
                  shall be true and correct on and as of the Closing Date with
                  the same effect as though made on and as of such date and the
                  Vendors shall have delivered to Dectron a solemn declaration
                  to such effect, dated such date, provided that the receipt of
                  such solemn declaration and the Closing herein provided for
                  shall not be a waiver of the representations, warranties,
                  covenants and agreements which shall continue in full force
                  and effect as provided herein; and

         7.1.9    Save and except for Investissements Novacap Inc., Vendors and
                  M. Patenaude shall on or before closing have executed and
                  delivered to Dectron a reasonable Non- Competition,
                  Non-Disclosure and Non-Sollicitation Agreement limited to two
                  (2) years in duration regarding the non-compete portion
                  thereof.

         In case any material condition to be performed or complied with for the
         benefit of Dectron at or prior to the Closing Time has not been
         performed or complied with in any material respect at or prior to the
         Closing Time, Dectron, without limiting any other right that Dectron
         has, may at its sole option, either (i) rescind this Agreement by
         notice to the Vendors, and





                                     - 17 -

         in such event Dectron shall be released from all obligations hereunder;
         or (ii) waive compliance with any such condition in whole or in part on
         such terms as may be agreed upon without prejudice to any of its rights
         of rescission in the event of non-performance or non-compliance with
         any other condition in whole or in part; and, if Dectron rescinds this
         Agreement, the Vendors shall also be released from all obligations
         hereunder.

7.2      CONDITIONS FOR THE BENEFIT OF THE VENDORS. The sale by the Vendors and
         the purchase by Dectron of the Shares is subject to the following
         conditions, which are for the exclusive benefit of the Vendors and
         which are to be performed or complied with at or prior to the Closing
         Time:

         7.2.1    Dectron shall have performed or complied with all of the
                  terms, covenants and conditions of this Agreement to be
                  performed or complied with by Dectron at or prior to the
                  Closing Time;

         7.2.2    at Closing, Dectron shall deliver to the Vendors the certified
                  cheques or bank drafts issued by Dectron to the order of the
                  Vendors in accordance with Section 2.2 hereof;

         7.2.3    the representations and warranties contained in Article 4
                  shall be true and correct on and as of the Closing Date with
                  the same effect as though made on and as of such date and
                  Dectron shall have delivered to the Vendors a solemn
                  declaration to such effect, dated such date, provided that the
                  receipt of such solemn declaration and the Closing herein
                  provided for shall not be a waiver of the representations,
                  warranties, covenants and agreements which shall continue in
                  full force and effect as provided herein; and

         7.2.4    the Vendors shall have been reimbursed all loans and advances
                  made to Cascade or to any of its Subsidiaries.

         In case any material condition to be performed or complied with for the
         benefit of the Vendors at or prior to the Closing Time has not been
         performed or complied with in any material respect at or prior to the
         Closing Time, the Vendors, without limiting any other right that
         Vendors have, may at their sole option, either (i) rescind this
         Agreement by notice to Dectron, and in such event Vendors shall be
         released from all obligations hereunder; or (ii) waive compliance with
         any such condition in whole or in part on such terms as may be agreed
         upon without prejudice to any of their rights or rescission in the
         event of non-performance or non-compliance of any other condition in
         whole or in part; and, if Vendors rescind this Agreement, Dectron shall
         also be released from all obligations hereunder.

         Notwithstanding anything provided for in this Agreement to the
         contrary, the Vendors shall be entitled to request that the terms of
         the transactions provided for under this Agreement be restructured and
         modified in any reasonable fashion to attain a more efficient tax
         treatment of the transactions provided for in this Agreement for the
         Vendors, without causing adverse





                                     - 18 -

         tax or other consequences for the other Parties, and Dectron and the
         Vendors and/or any one of them agree to execute and deliver any
         reasonable document and do all reasonable things considered necessary
         or useful in this connection. Without limiting the generality of the
         foregoing, such adjustments could include (i) the declaration (or
         deemed declaration) by Cascade (and/or its subsidiaries), prior to the
         Closing Date, of a dividend out of the so-called "Safe Income" account
         maintained for income tax purposes and, as appropriate, corresponding
         proportionate reduction of the Purchase Price; and (ii) the sale by the
         shareholders of 9048-3140 Quebec Inc. of their shares of such
         corporation to permit Marcel Patenaude to benefit fully from his
         capital gains tax exemption. This may also include the redemption and
         cancellation by 9048-3140 Quebec Inc. of the shares held by 1853-9130
         prior to the Closing Time with corresponding adjustments to be made to
         the Purchase Price and conditions of the Purchase. No adjustment
         required herein will result in increasing the total consideration paid
         by Dectron under all of the transactions envisaged under this
         Agreement.

7.3      DUE DILIGENCE. Within two (2) Business Days following the execution of
         this Agreement and of a Confidentiality Agreement in favour of Cascade
         and the Vendors and in a form satisfactory to the Vendors, Dectron
         shall be authorized to commence a due diligence review of Cascade's and
         P.M. Wright Ltd.'s Businesses with a view of verifying the accuracy of
         the representations and warranties set forth in Article 3 hereof,
         according to the following.

         In this respect, by the second (2nd) Business Day following the
         execution of this Agreement, the Vendors shall first cause Cascade to
         establish a data room (the "Data Room") and to assemble therein in
         respect of Cascade and the Subsidiaries the documents and information
         relating to the Assets and the Business specified in Schedule 7.3, the
         whole so as to provide Dectron with the opportunity to verify same for
         a period of up to fifteen (15) days thereafter, provided that if
         Dectron requires an additional delay (not to exceed an additional seven
         (7) days) to conduct such verification, based on reasonable grounds,
         then the Vendors shall not unreasonably withhold such consent (which in
         any case shall be limited to an additional seven (7) days) and the
         other delays set forth in this Section 7.3 shall be extended by the
         same additional delay.

         The Vendors shall also cause Cascade to make the following persons
         available to respond to Dectron's reasonable questions for additional
         information during normal business hours and upon reasonable prior
         notice at a due diligence question period to be held between the tenth
         (10th) to the fifteenth (15) day inclusively following the commencement
         of Dectron's due diligence: the President, Vice-Presidents and
         Controller of Cascade and P.M. Wright Ltd.; it being understood,
         however, that Dectron shall not communicate with any other employee,
         director, officer or agent nor any customer or supplier of the Vendors,
         Cascade or the Subsidiaries without the Vendor's prior written consent.

         Dectron shall advise the Vendors in writing not later than the
         twentieth (20th) day following commencement of the due diligence
         process of any adverse element or material discrepancy between its due
         diligence review and the representations and warranties set forth in
         Article





                                     - 19 -

         3 and, as the case may be, as to its decision to proceed or not to
         Closing in such respect. Should Dectron fail to so advise the Vendors
         within such delay, Dectron shall be deemed to have advised the Vendors
         that Dectron wishes to proceed to Closing.


                                    ARTICLE 8
                          CLOSING AND CLOSING DOCUMENTS

8.1      CLOSING. The sale and purchase of the Shares shall be completed at the
         Closing Time at the offices of Martineau Walker, 800 Square Victoria,
         Suite 3400, Montreal, Quebec.


                                    ARTICLE 9
                                     GENERAL

9.1      EXPENSES. Each party shall pay all expenses it incurs in authorizing,
         preparing, executing and performing this Agreement and the transactions
         contemplated hereunder, whether or not the Closing occurs, including
         all fees and expenses of its legal counsel, bankers, investment
         bankers, brokers, accountants or other representatives or consultants.

9.2      COMMISSION. Each party represents and warrants to the other party that
         such other party will not be liable for any brokerage commission,
         finder's fee or other similar payment in connection with the
         transactions contemplated hereby because of any action taken by, or
         agreement or understanding reached by, the first party.

9.3      TIME.  Time is of the essence of each provision of this Agreement.

9.4      NOTICES. Any notice, demand or other communication (in this Section, a
         "notice") required or permitted to be given or made hereunder shall be
         in writing and shall be sufficiently given or made if:

         9.4.1    delivered in person during normal business hours on a Business
                  Day and left with a receptionist or other responsible employee
                  of the relevant party at the applicable address set forth
                  below;

         9.4.2    sent by prepaid first class mail; or

         9.4.3    sent by any electronic means of sending messages, including
                  telex or facsimile transmission, which produces a paper record
                  ("TRANSMISSION") during normal business hours on a Business
                  Day charges prepaid and confirmed by prepaid first class mail;
                  and

         in the case of a notice to the VENDORS, addressed to them at:





                                     - 20 -

         -        INVESTISSEMENTS NOVACAP INC.
                  375 Rolland-Therrien Boulevard
                  Suite 210
                  Longueuil, Quebec
                  J4H 4A6

                  Attention:  Mr. Jean-Pierre Chartrand or Mr. Jacques Foisy
                  Telecopier No.:  (450) 651-7585

         -        9048-3140 QUEBEC INC.
                  3999, Cote-Vertu
                  Saint-Laurent, Quebec
                  H4R 1R2

                  Attention:  Mr. Marcel Patenaude
                  Telecopier No.:  (514) 337-4820

         -        MR. HARRY TOPIKIAN
                  5037 Notre-Dame
                  Laval, Quebec
                  H7W 1V6

         -        MR. NICK AGOPIAN
                  26 Malard
                  Dollard-des-Ormeaux, Quebec
                  H9A 3G8

         -        MR. BRIAN MONK
                  2300 Ward, Condo 207
                  St-Laurent, Quebec
                  H4M 2V3

         and in the case of a notice to DECTRON, addressed to it at:

         -        DECTRON INTERNATIONALE INC.
                  4300 Poirier Boulevard
                  Montreal, Quebec
                  H4R 2C5

                  Attention: Mr. Ness Lakdawala
                  Telecopier No.: (514) 334-9184






                                     - 21 -

         Each notice sent in accordance with this Section shall be deemed to
         have been received, either on the day it was delivered, or on the third
         (3rd) Business Day after it was mailed (excluding each Business Day
         during which there existed any general interruption of postal services
         due to strike, lockout or other cause), or on the same day that it was
         sent by Transmission, or on the first (1st) Business Day thereafter if
         the day on which it was sent by Transmission was not a Business Day, as
         the case may be. Any party may change its address for notice by giving
         notice to the other Parties in the manner set out above.

9.5      PUBLIC ANNOUNCEMENTS. No party shall make any public statement or issue
         any press release concerning the transactions contemplated by this
         Agreement except as may be necessary to comply with the requirements of
         all applicable laws or with the consent of the other parties which
         consent shall not be unreasonably withheld. If any such public
         statement or release is so required, the party making such disclosure
         shall consult with the other Parties prior to making such statement or
         release, and the Parties shall use all reasonable efforts, acting in
         good faith, to agree upon a text for such statement or release which is
         satisfactory to all Parties.

9.6      ASSIGNMENT. Neither party may assign any rights or benefits under this
         Agreement, including the benefit of any representation or warranty, to
         any Person. Each party agrees to perform its obligations under this
         Agreement itself, and not to arrange in any way for any other Person to
         perform those obligations. No assignment of benefits or arrangement for
         substituted performance by one party shall be of any effect against the
         other party except to the extent that other party has consented to it
         in writing. Subject to the foregoing, this Agreement shall enure to the
         benefit of and be binding upon the Parties and their respective
         successors (including any successor by reason of amalgamation or
         statutory arrangement of any party).

9.7      FURTHER ASSURANCES. Each party shall do such acts and shall execute
         such further documents, conveyances, deeds, assignments, transfers and
         the like, and will cause the doing of such acts and will cause the
         execution of such further documents as are within its power as any
         other party may in writing at any time and from time to time reasonably
         request be done and or executed, in order to give full effect to the
         provisions of each Closing Document.

9.8      COUNTERPARTS. This Agreement may be executed in any number of
         counterparts. Each executed counterpart shall be deemed to be an
         original. All executed counterparts taken together shall constitute one
         agreement.

9.9      FACSIMILE EXECUTION. To evidence the fact that it has executed this
         Agreement, a party may send a copy of its executed counterpart to all
         other Parties by facsimile transmission. That party shall be deemed to
         have executed this Agreement on the date it sent such facsimile
         transmission. In such event, such party shall forthwith deliver to the
         other party the counterpart of this Agreement executed by such party.






                                     - 22 -

TO WITNESS their agreement, the Parties have duly executed this Agreement at
Montreal, Quebec, as of the date indicated hereinabove.

DECTRON INTERNATIONALE INC.                       INVESTISSEMENTS NOVACAP INC.


Per:  ------------------                          Per:  ------------------ 


9048-3140 QUEBEC INC.                             Per:  ------------------ 


Per:  ------------------                         -------------------------
      Marcel Patenaude                           NICK AGOPIAN


- ------------------------                         -------------------------
HARRY TOPIKIAN                                   BRIAN MONK