MJ Mechanical Services is a full service commercial and industrial HVACR (heating, ventilation, air conditioning and refrigeration) mechanical contractor with offices in Tonawanda (a suburb of Buffalo), Rochester and Olean, NY. From commercial/industrial air conditioning services to HVAC system design and installation, MJ Mechanical is the premier choice in Western New York (WNY). As a member of Comfort Systems USA, MJ Mechanical is able to offer excellent value to our industrial and commercial customers.  Residential services provided by Vastola Heating & Air Conditioning, a division of MJ Mechanical Services.