M.J. Williams Heating & Air Conditioning, 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.

Some of Our HVAC Services Include:

* Sheet Metal Fabrication
* Custom Metal Fabrication
* Air Conditioning Service
* Boiler & Furnace Services
* Heating Installation & Repair
* Radiant Heat

Our reputation of providing excellent HVAC work at a reasonable price, and being honest and trustworthy has allowed us to continually serve our customers since 1988. We are licensed & insured and backed by experience and customer satisfaction. We have also completed Mitusbishi’s M and P Series Installation & Service Essentials training course.

A lot of factors will go into what size heating and cooling unit you’ll need. The type of house you own, its walls, insulation, attic space, and more can go into determining what size unit is required. A system that is too large could result in a home that’s too humid, causing problems with moisture and mold. A system that is too small will run constantly, running up your energy bill. Only a qualified heating and cooling technician can determine what size unit is best for your home.

Heating and cooling units need to have scheduled tune-ups to make sure everything is operating properly. Our HVAC experts recommend an annual inspection and service for each of your heating & cooling units. You don’t want your unit to stop working in the dead of winter or heat of summer! Schedule HVAC service by giving us a call at 508-949-0035.

Your HVAC expert can make a proper recommendation by looking at your heating or cooling system, but here are some common signs that it’s time to upgrade your HVAC system:

• Your heat pump or air conditioner is more than 10 years old
• Your furnace or boiler is more than 15 years old
• Your equipment needs frequent repairs and your energy bills are going up
• Some rooms in your home are too hot or too cold
• Your home has humidity problems
• Your heating or cooling system is noisy

Besides making sure your system is not too old, here are some steps to increase the energy efficiency of your heating and cooling system:

• Change your air filters regularly
• Have a yearly tune-up done on your heating & cooling system
• Install a smart thermostat

And much more! Contact our HVAC experts for energy saving tips for your home.

We understand that heating and cooling units are a big investment. There are a few ways that you can help maximize the life of your unit, including:

• Reduce usage – turning the thermostat up or down if you’re not home
• Change your air filters regularly
• Yearly tune-ups
• Clean your ducts, vents, and registers
• Contact Energize CT or Mass Save for an energy assessment

The type of HVAC system that makes the most sense for your home is going to vary from home to home. One of our HVAC service experts will be able to provide you with recommendations based on your home and heating and cooling needs.

Yes, we do provide emergency heating & air conditioning services. Please contact us at 508-949-0035.