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About Us

William N. Harris Incorporated is centrally located in Providence, Rhode Island and has proudly been serving southern New England since 1942.  We are a third generation, locally owned and operated family business with over seventy years of expertise.  Our company has kept up to date with the ever-changing industries and prides itself on our unmatched customer service and loyalty.

If your needs are for Heating, Ventilation, Indoor, Air Conditioning, Air Quality or Refrigeration either residential or commercial, we have them covered with our years of expertise. Our service and installation departments are made up of highly skilled, licensed technicians. Our engineering department can troubleshoot and custom design even the most complex systems.

We are the high efficiency experts and specialize in systems that minimize energy consumption and maximize financial savings.

Having been in business since 1942, this speaks towards the nature of the company.  Dependable, reliable, trustworthy, quality are the words that are often said.  We stand by our reputation and always do what is right for the customer. 

Our company employs the best technicians in the state.  These employees convey quality workmanship and technical knowledge to every customer.  We are often called to jobsites that other companies can’t handle or have improperly installed. 

Our company offers the following accreditations and licenses:

  • Rhode Island Master Mechanical License
  • EPA Certification
  • Carrier University School of Engineering Graduate
  • BPI (Building Performance Institute) Building Analyst Professional
  • Rhode Island Department of Health Lead Safe Renovator/Remodeler
  • Viessmann Vitosol Solar
  • OSHA 10 and 30 Construction Industry Instruction
  • JLG Aerial Work Platform and Telehandler Instruction    
  • Numerous Manufacturer Trainings 



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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