Welcome to Michael J. WIlliams, Inc.

Welcome to Michael J. WIlliams, Inc.

Michael J. Williams, Inc. is a full service HVAC contractor serving both residential and commercial customers in Massachusetts and Northeast Connecticut. We provide prompt, professional and affordable service and installations of all your heating and air conditioning systems, and are available for maintenance and emergency service.

We stand behind our work 100%, but should something go wrong, all existing customers receive 24/7 emergency service.

Residential work ranges from antique homes as small as 800 sq. ft., to ultra contemporary, 18,000 sq. ft. homes. Whether your home is large or small, we can provide you with everything you need to keep your heating and cooling systems running smoothly and efficiently.

Commercial work includes: offices, retail spaces, restaurants and more.

Our reputation of providing excellent work at a reasonable price, and being honest and trustworthy has allowed us to continually serve our customers for 28 years.

Michael J. Williams, Inc. is proud to serve Northern CT and Western MA including Woodstock CT, Thompson CT, Putnam CT, Killingly CT, Dayville CT, Brooklin CT, Union CT, Eastford CT, Ashford CT, Sturbridge MA, Charlton MA, Southbridge MA, Dudley MA, Webster MA, Douglas MA, Oxbridge MA, Sutton MA, Oxford MA and Auburn MA.
Specializing in: Air Conditioners, Furnaces, Heating & Air Conditioning, Central Air, Air Conditioning Repair, HVAC Contractor Services and more