EXHIBIT 10.1


                              EMPLOYMENT AGREEMENT


         THIS EMPLOYMENT AGREEMENT (this "Agreement") between Comfort Systems
USA (Texas), L.P., a Texas Limited Partnership (the "Company"), and Thomas N.
Tanner ("Executive") is entered into and effective as of the 14th day of June
2002. This Agreement supersedes any other employment agreements or
understandings, written or oral, between the Company and Executive.

                                    RECITALS

         The following statements are true and correct:

                  As of the date of this Agreement, the Company, and its
         affiliates (collectively, the "Comfort Group") are engaged in the
         business of mechanical contracting services, including heating,
         ventilation and air conditioning, plumbing, fire protection, piping and
         electrical and related services ("Services").

                  Executive is to be employed by the Company in a confidential
         relationship wherein Executive, in the course of Executive's employment
         with the Company, will become familiar with and aware of information as
         to the Comfort Group's customers, specific manner of doing business,
         including the processes, techniques and trade secrets utilized by the
         Comfort Group, employees and future plans with respect thereto, all of
         which has been and will be established and maintained at great expense
         the Comfort Group. This information is a trade secret and constitutes
         the valuable goodwill of the Company and the Comfort Group.

                  Each of Company and Executive desire to establish Executive's
         employment by the Company pursuant to this Agreement.

         NOW, THEREFORE, in consideration of the mutual promises, terms,
covenants and conditions set forth herein, the Company and Executive hereby
agree as follows:

                                   AGREEMENTS

         1. Employment and Duties.

                  (a) The Company hereby employs Executive in an executive
         position and Executive hereby accepts this employment upon the terms
         and conditions herein contained. Executive agrees to devote
         substantially all of Executive's business time, attention and efforts
         to promote and further the business of the Company.

                  (b) Executive shall faithfully adhere to, execute and fulfill
         all lawful policies established by the Company and the Comfort Group,
         including the Comfort Systems USA ("Comfort") Corporate Compliance
         Policy.

                  (c) Executive shall not, during the term of Executive's
         employment hereunder, be engaged in any other business activity pursued
         for gain, profit or other pecuniary advantage if such activity
         interferes in any material respect with Executive's duties and


                                       1



         responsibilities hereunder. The foregoing limitations shall not be
         construed as prohibiting Executive from making personal investments in
         such form or manner as will neither require Executive's services in the
         operation or affairs of the companies or enterprises in which such
         investments are made nor violate the terms of Section 4.

         2. Compensation. For all services rendered by Executive, the Company
shall compensate Executive as follows:

                  (a) Base Salary. Effective the date hereof, the base salary
         payable to Executive shall be $175,000 per year, payable on a regular
         basis in accordance with the Company's standard payroll procedures, but
         not less often than monthly. On at least an annual basis, the Company
         will review Executive's performance and may make adjustments to such
         base salary if, in its discretion, any such adjustment is warranted.

                  (b) Executive Perquisites, Benefits and Other Compensation.
         Executive shall be entitled to receive additional benefits and
         compensation from the Company in such form and to the extent specified
         below:

                           (i) Coverage, subject to contributions required of
                  employees generally, for Executive and Executive's dependent
                  family members under health, hospitalization, disability,
                  dental, life and other insurance plans that the Company may
                  have in effect from time to time for the benefit of its
                  employees.

                           (ii) Reimbursement for all business travel and other
                  out-of-pocket expenses reasonably incurred by Executive in the
                  performance of Executive's services pursuant to this
                  Agreement. Reimbursable expenses shall be appropriately
                  documented in reasonable detail by Executive, and shall be in
                  a format consistent with the Company's expense reporting
                  policy.

                           (iii) Participation in the Company's incentive
                  compensation plan for top-ranking regional executives.

         3. Confidentiality.

                  (a) Confidential Information. As used herein, the term
         "Confidential Information" means any information, technical data or
         know-how of the Company and the other members of the Comfort Group,
         including, but not limited to, that which relates to customers,
         business affairs, business plans, financial matters, financial plans
         and projections, pending and proposed acquisitions, operational and
         hiring matters, contracts and agreements, marketing, sales and pricing,
         prospects of the Comfort Group, and any information, technical data or
         know-how that contain or reflect any of the foregoing, whether prepared
         by the Company, any other member of the Comfort Group, Executive or any
         other person or entity; provided, however, that the term "Confidential
         Information" shall not include information, technical data or know-how
         that Executive can demonstrate is generally available to the public not
         as a result of any breach of this Agreement by Executive.


                                       2



                  (b) No Disclosure. Except in the performance of Executive's
         duties as an executive of the Company, Executive will not, during or
         after the term of Executive's engagement with the Company, disclose to
         any person or entity or use, for any reason whatsoever, any
         Confidential Information.

         4. Non-Competition Agreement.

                  (a) Competition. Executive will not, during the period of
         Executive's employment by or with the Company, and for a period of one
         year immediately following the termination of Executive's employment,
         for any reason whatsoever, directly or indirectly, on behalf of
         Executive or on behalf of or in conjunction with any other person,
         company, partnership, corporation or business of whatever nature:

                           (i) engage, as an officer, director, shareholder,
                   owner, partner, joint venturer, or in a managerial capacity,
                   whether as an employee, independent contractor, consultant or
                   advisor, or as a sales representative, or make or guarantee
                   loans or invest, in or for any business engaged in Services
                   in competition with the Company Group or any other member of
                   the Comfort Group within seventy-five (75) miles of where any
                   Comfort Group operation or subsidiary conducts business if
                   Executive has had responsibility for, or material input or
                   participation in, the management or operation of such other
                   operation or subsidiary (the "Territory");

                           (ii) call upon any person who is, at that time, an
                   employee of the Company or any other member of the Comfort
                   Group in a technical, managerial or sales capacity for the
                   purpose or with the intent of enticing such employee away
                   from or out of the employ of the Company or such other member
                   of the Comfort Group;

                           (iii) call upon any person or entity which is at that
                  time, or which has been within two (2) years prior to that
                  time, a customer of the Company or any other member of the
                  Comfort Group for the purpose of soliciting or selling
                  Services;

                           (iv) call upon any prospective acquisition candidate,
                  on Executive's own behalf or on behalf of any competitor,
                  which acquisition candidate either was called upon by the
                  Executive on behalf of the Company or any other member of the
                  Comfort Group or was the subject of an acquisition analysis
                  made by Executive on behalf of the Company or any other member
                  of the Comfort Group for the purpose of acquiring such
                  acquisition candidate.

         Notwithstanding the above, the foregoing covenants shall not be deemed
         to prohibit Executive from acquiring as an investment not more than one
         percent (1%) of the capital stock of a competing business whose stock
         is traded on a national securities exchange or on an over-the-counter
         or similar market.

                  (b) No Violation. It is specifically agreed that the period
         during which the agreements and covenants of Executive made in this
         Section 4 shall be effective shall be computed by excluding from such
         computation any time during which Executive is in violation of any
         provision of this Section 4.


                                       3



                  (c) Extension. Notwithstanding the foregoing provisions of
         this paragraph 4, if this Agreement is terminated pursuant to paragraph
         5, then, upon written notice to Executive not later than 60 days
         following the date of such termination, the Company may at its option
         extend by up to twelve additional months the agreements and covenants
         contained in this paragraph 4 by paying to Executive a number of months
         of base salary equal to the length of the extension specified in such
         notice, any such amounts to be payable during such extension period in
         a manner consistent with the Company's standard pay practices.

         5. Term; Termination; Rights on Termination. The term of this Agreement
shall begin on the date hereof and continue for a term of two (2) years, unless
renewed or terminated under this Paragraph 5. At the end of the initial term
described in the preceding sentence, this Agreement shall automatically renew
for succeeding terms of one (1) year each (subject to termination under this
Paragraph), unless either party shall, at least 10 days prior to the expiration
of any term, give written notice of an intention not to renew this Agreement.
This Agreement and Executive's employment may be terminated in any one of the
following ways:

                  (a) Death. The death of Executive shall immediately terminate
         this Agreement with no severance compensation due to Executive's
         estate.

                  (b) Disability. If, as a result of incapacity due to physical
         or mental illness or injury, Executive shall have been absent from
         Executive's full-time duties hereunder for four (4) consecutive months,
         then thirty (30) days after receiving written notice (which notice may
         occur before or after the end of such four (4) month period, but which
         shall not be effective earlier than the last day of such four (4) month
         period), the Company may terminate Executive's employment hereunder,
         provided Executive is unable to resume Executive's full-time duties at
         the conclusion of such notice period. In the event this Agreement is
         terminated as a result of Executive's disability, Executive shall
         receive from the Company Executive's base salary at the rate then in
         effect for the lesser of the time period remaining under the Term or
         six (6) months, and such amount shall be payable during such period in
         a manner consistent with Company's standard pay practices. The amount
         payable hereunder shall be decreased by the amount of benefits
         otherwise actually paid by the Company to Executive or on Executive's
         behalf or under any insurance procured by the Company.

                  (c) Good Cause. The Company may terminate this Agreement ten
         (10) days after written notice to Executive for good cause, which shall
         include any of the following: (i) Executive's willful or material
         breach of this Agreement; (ii) Executive's failure to perform any of
         his material duties following notice by the Company to Executive of
         such improper performance and Executive's failure to correct the
         improper performance to the satisfaction of the Company within a
         reasonable time; (iii) Executive's gross negligence in the performance
         or intentional nonperformance of any of Executive's material duties and
         responsibilities hereunder; (iv) Executive's willful dishonesty, fraud
         or misconduct with respect to the business or affairs of the Company or
         any other member of the Comfort Group; (v) Executive's conviction of a
         felony crime; (vi) Executive's confirmed positive illegal drug test
         result; (vii) sexual harassment by Executive; or (viii) willful or
         material failure by Executive to comply with Comfort's Corporate
         Compliance Policy or other Company


                                       4



         policies. In the event of a termination for good cause, as enumerated
         above, Executive shall have no right to any severance compensation.

                  (d) Without Cause. At any time after the commencement of
         Executive's employment, Executive or the Company may, without cause,
         terminate this Agreement and Executive's employment, effective fifteen
         (15) days after receipt of written notice. Should Executive be
         terminated by the Company without cause, Executive shall receive from
         the Company Executive's base salary at the rate then in effect for six
         (6) months, and such amount shall be payable during such period in a
         manner consistent with the Company's standard pay practices. If
         Executive resigns or otherwise terminates Executive's employment,
         Executive shall receive no severance compensation.

         6. Return of Company Property. All records, plans, manuals, "field
guides", memoranda, lists, documents, statements and other property delivered to
Executive by or on behalf of the Company or any other member of the Comfort
Group, by any customer of the Company or any other member of the Comfort Group
(including, but not limited to, any such customers obtained by Executive), by
any acquisition candidate of the Company or any other member of the Comfort
Group, and all records compiled by Executive which pertain to the business or
activities of the Company or any other member of the Comfort Group shall be and
remain the property of the Company and shall be subject at all times to its
discretion and control. Likewise, all correspondence with customers,
representatives or acquisition candidates, reports, records, charts, advertising
materials, and any data collected by Executive or by or on behalf of the Company
or any other member of the Comfort Group or any representative of any of them
shall be delivered promptly to the Company without request by it upon
termination of Executive's employment with the Company.

         7. Inventions. Executive shall disclose promptly to the Company any and
all significant conceptions and ideas for inventions, improvements and valuable
discoveries, whether patentable or not, which are conceived or made by
Executive, solely or jointly with another, during the period of Executive's
employment with the Company or within one (1) year thereafter, and which are
directly related to the business or activities of the Company or which Executive
conceives as a result of Executive's employment by the Company. Executive hereby
assigns and agrees to assign all Executive's interests therein to the Company or
its nominee. Whenever requested to do so by the Company, Executive shall execute
any and all applications, assignments or other instruments that the Company
shall deem necessary to apply for and obtain Letters Patent of the United States
or any foreign country or to otherwise protect the Company's interest therein.

         8. Trade Secrets. Executive agrees that Executive will not, during or
after the Term, disclose the specific terms of the Company's or any other member
of the Comfort Group's relationships or agreements with significant vendors or
customers or any other significant and material trade secret of the Company or
any other member of the Comfort Group, whether in existence or proposed, to any
person, firm, partnership, corporation or business for any reason or purpose
whatsoever.

         9. Prior Agreements. This Agreement supercedes any prior documents or
understandings with respect to Executive's employment with the Company.
Executive hereby represents and warrants to the Company that the execution of
this Agreement by Executive and Executive's employment by the Company and the
performance of Executive's duties hereunder will


                                       5



not violate or be a breach of any agreement with a former employer, client or
any other person or entity. Further, Executive agrees to indemnify the Company
for any claim, including, but not limited to, attorneys' fees and expenses of
investigation, by any such third party that such third party may now have or may
hereafter come to have against the Company based upon or arising out of any
non-competition agreement, invention or secrecy agreement between Executive and
such third party which was in existence as of the date of this Agreement.

         10. Assignment; Binding Effect. Executive understands that Executive
has been selected for employment by the Company on the basis of Executive's
personal qualifications, experience and skills. Executive agrees, therefore,
that Executive cannot assign all or any portion of Executive's performance under
this Agreement. Executive, Executive's spouse and the estate of each shall not
have any right to encumber or dispose of any right to receive payments
hereunder, it being understood that such payments and the right thereto are
nonassignable and nontransferable; provided, however, that in the event of the
death of Executive, any payments that Executive is entitled to receive may be
assigned to the beneficiaries of Executive's estate. Subject to the preceding
three (3) sentences and the express provisions of Section 11, this Agreement
shall be binding upon, inure to the benefit of and be enforceable by the parties
hereto and their respective heirs, legal representatives, successors and
assigns.

         11. Complete Agreement. Executive has no oral representations,
understandings or agreements with the Company or any of its officers, directors
or representatives covering the same subject matter as this Agreement. This
Agreement is the final, complete and exclusive statement and expression of the
agreement between the Company and Executive and of all the terms of this
Agreement, and it cannot be varied, contradicted or supplemented by evidence of
any prior or contemporaneous oral or written agreements.

         12. Amendment; Waiver. This Agreement may not be modified except in a
writing signed by the parties, and no term of this Agreement may be waived
except by a writing signed by the party waiving the benefit of such term. No
waiver by the parties hereto of any default or breach of any term, condition or
covenant of this Agreement shall be deemed to be a waiver of any subsequent
default or breach of the same or any other term, condition or covenant contained
herein.

         13. Notice. Whenever any notice is required hereunder, it shall be
given in writing addressed as follows:


         To the Company:     Comfort Systems USA, Inc.
                             777 Post Oak, Suite 500
                             Houston, TX 77056
                             Attention: General Counsel

         To Executive:       Thomas N. Tanner
                             6862 Claret Circle
                             Fayetteville, NY 13066

Notice shall be deemed given and effective on the earlier of five (5) days after
the deposit in the U.S. mail of a writing addressed as above and sent first
class mail, certified, return receipt requested, or when actually received.
Either party may change the address for notice by notifying the other party of
such change in accordance with this Section 13.


                                       6



         14. Severability; Enforceability. If any portion of this Agreement is
held invalid or inoperative, the other portions of this Agreement shall be
deemed valid and operative and, so far as is reasonable and possible, effect
shall be given to the intent manifested by the portion held invalid or
inoperative. Moreover, in the event any court of competent jurisdiction shall
determine that the scope, time or territorial restrictions set forth in any
covenant contained herein are unreasonable, then it is the intention of the
parties that such restrictions be enforced to the fullest extent which the court
deems reasonable, and this Agreement shall thereby be reformed. Each of the
covenants contained in this Agreement shall be construed as an agreement
independent of any other provision in this Agreement, and the existence of any
claim or cause of action of Executive against the Company, whether predicated on
this Agreement or otherwise, shall not constitute a defense to the enforcement
by the Company of such covenants.

         15. Survival. The provisions and covenants of Sections 3, 4, 6, 7 and 8
shall survive termination of this Agreement.

         16. Specific Performance Because of the difficulty of measuring
economic losses to the Company as a result of a breach of the covenants
contained in Sections 3, 4, 6, 7 and 8 and because of the immediate and
irreparable damage that could be caused to the Company for which it would have
no other adequate remedy, Executive agrees that the Company shall be entitled to
specific performance and that such covenants may be enforced by the Company in
the event of any breach or threatened breach by Executive, by injunctions,
restraining orders and other appropriate equitable relief. Executive further
agrees to waive any requirement for the securing or posting of any bond in
connection with the obtaining of any such injunctive or other equitable relief.

         17. Governing Law. This Agreement shall be governed by and construed in
accordance with the internal laws of the State of Texas.

         18. Counterparts. This Agreement may be executed in multiple
counterparts, each of which shall be deemed to be an original and all of which
together shall constitute one and the same instrument.

         IN WITNESS WHEREOF, the parties hereto have executed this Agreement as
of the day and year first above written.


EXECUTIVE:                              COMPANY:

                                        COMFORT SYSTEMS USA (TEXAS), L.P.


/s/ Thomas N. Tanner                    /s/ Dave Lanphar
- --------------------                    ----------------------------------
Thomas N. Tanner                        Name:  Dave Lanphar
                                        Title: Senior Vice President



                                       7