Electric Plenum Heaters

A plenum heater is an electric resistance heating device that is installed in the plenum, which is the spot in the ductwork system where ducting and furnace join. Air is heated as it flows across electric elements and then is distributed through the existing ductwork.

It’s a low-cost way to upgrade your heating system and turn your fossil-fuel furnace into a dual-fuel system, which allows you to take advantage of our off-peak rates. Your HVAC contractor can tell you if you have adequate space in your plenum to add a plenum heater. They can be installed while remodeling or during new construction and provide 100% efficient electric heat.

A plenum heater

  • Can meet your home's total heating needs.
  • Works with fossil fuel systems in dual-fuel heating systems.
  • Provides supplemental heating when installed with a heat pump. You’ll get a combined efficiency of about 130%.

Save with off-peak rates

You can operate a plenum heater on our General Service Rates or install it as part of a qualified off-peak rate program, including Dual Fuel or RDC, that offers a discounted price per kilowatt-hour. If a plenum heater is installed on an off-peak rate, part of the installation may require additional wiring, a second meter socket, and service panel.

Learn more

Contact our Idea Center or call 800-493-3299 to find out if a plenum heater is right for you.

You also can consult these technology providers:

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