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William N. Harris, Inc. offers service on heating and air conditioning units on all brands of air conditioners, heat pumps, furnaces, fan coils, and thermostats to residents and businesses in Rhode Island , nearby Massachusetts and Connecticut . We the area's heating and air conditioning experts offering excellent quality of service and affordable rates. Whether you need maintenance, repair, replacement, new construction or remodeling, we want to be your heating and cooling contractor.

Our goal at William N. Harris, Inc. is to provide you with not only top of the line service,
but to offer only top of the line quality products, with outstanding product warranties. We believe it is one of the most important duties to help inform and educate you on which products best suits your family's and businesses needs. We know that each home or office situation is different, so we would like to extend our quality service, our quality products and a professional staff helping people create a more comfortable, healthier living environmental home or at the workplace.

Some examples of work we do are:

  • New construction
  • Historical Restoration
  • Advanced Retrofits
  • Oil to Gas Conversions
  • Hybrid/Dual Fuel Heating Systems
  • Solar Thermal Systems
  • HVAC dehumidifiers for indoor swimming pools.

Our Products

Super Market Rack Systems
Coolers & Freezers
Ice Machines
Rooftop Packaged Units
High Efficiency Systems
Exhaust Hoods
Gas & Oil Fired Furnaces
Hot Water & Steam Boilers
Heat Pumps
Glycol Systems


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