EXHBIT 5.1

                                                               February 22, 2002


Dectron Internationale Inc.
4300 Poirier Blvd.
Montreal, Quebec
Canada H4R 2C5

Ladies and Gentlemen:

         You have requested our opinion with respect to the offer and sale by
Dectron Internationale Inc., a Quebec, Canada corporation (the "Company"),
pursuant to a registration statement (the "Registration Statement") on Form S-8
under the Securities Act of 1933, as amended (the "Act"), of up to 1,150,000
shares of Dectron Internationale Inc., no par value per share (the "Common
Stock") issuable upon exercise of stock options granted or available for grant
under the Company's 1998 Stock Option Plan and 2001 Stock Option Plan (the "Plan
Shares").

         We have examined the originals, or copies certified or otherwise
identified to our satisfaction, of such documents and corporate and public
records as we deem necessary as a basis for the opinion hereafter expressed.
With respect to such examination, we have assumed the genuineness of all
signatures appearing on all documents presented to us as originals, and the
conformity to the originals of all documents presented to us as conformed or
reproduced copies. Where factual matters relevant to such opinion were not
independently established, we have relied upon certificates of executive
officers and responsible employees and agents of the Company.

         Based upon the foregoing, it is our opinion that the Plan Shares have
been duly and validly authorized and when sold, paid for and issued, as
contemplated by the Company's 1998 Stock Option Plan and 2001 Stock Option Plan,
will be duly and validly issued and fully paid and nonassessable.

         We hereby consent to the use of this opinion as Exhibit 5.1 to the
Registration Statement. In giving this consent, we do not thereby concede that
we come within the categories of persons whose consent is required by the Act or
the General Rules and Regulations promulgated thereunder.


                               Very truly yours,

                               /s/ GERSTEN, SAVAGE, KAPLOWITZ, WOLF & MARCUS LLP
                               -------------------------------------------------
                               Gersten, Savage, Kaplowitz, Wolf & Marcus LLP