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"We’re proud of the company we keep"

In the wake of the Coronavirus, we’ve got a few more ideas and products to add to your toolbox.  Try these solutions from Nu-Calgon.

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HVAC Accessories

No HVAC system is complete without the right HVAC accessories, and William E. Kingswell is pleased to offer contractors, engineers, and consumers a variety of HVAC accessories. Whether you’re looking for a match to an older HVAC system or seeking new, modern HVAC smart thermostats, William E. Kingswell can help. Not sure if we have what you are looking for? Contact our experienced team of staff to see how we can help.

Our HVAC Accessories

Our range of HVAC accessories includes:

  • Humidifier panels
  • Water panels
  • Air cleaners
  • Ventilation
  • Humidifiers
  • Dehumidifiers
  • Media filters
  • Pleated filters
  • Sump pumps
  • Carbon monoxide monitors or detectors
  • Wet switches
  • Lint alert alarms
  • Surge protection for HVAC equipment and whole-house appliances
  • Programmable thermostats
  • Smart thermostats


We Have the Accessory You’re After


William E. Kingswell has a broad range of commercial and residential HVAC accessory and HVAC products for both traditional commercial buildings and multi-family units. We stock the brands that you already trust, including:

  • Baron Wire Cable
  • Beckett
  • Bramec
  • Bristol Tanks
  • C&D Valve
  • Diversitech
  • Dupont Refrigerants
  • DuraGrid Pads
  • Fasco and Fasco Motors
  • Fieldpiece
  • Grundfos
  • Ideal Tape
  • Imperial Eastman
  • Honeywell
  • Holyoake
  • Kavco Insulation
  • Packard Motors
  • Parker
  • Potomac Air Gas
  • Prest-O-Lite
  • Robinair
  • Sealed Units Parts (SUPCO)
  • Steinen
  • Steveco
  • Tjernlund
  • TurboTorch
  • Virginia Chemicals
  • Wagner
  • Watsco and Westwood