Electric Plenum Heaters

A plenum heater is an electric resistance heating device that's installed in the open-air space where ductwork and a furnace join. Air is heated as it flows across electric elements and then is distributed through the existing ductwork.

Adding a plenum heater is 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 one of our off-peak rates. A plenum heater can be installed while remodeling or during new construction and provides 100% efficient electric heat. If you have low ceilings consult your HVAC contractor to learn if you have adequate space to add a plenum heater.

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% to 150%.

Electric Plenum Heaters

Save with off-peak rates

You can operate a plenum heater on our General Service Rate or install one as part of a qualified off-peak rate program, including Dual Fuel or Residential Demand Control (RDC), that offers a discounted price per kilowatt-hour.

Rebates are available

Install an electric plenum heater on our Dual Fuel or RDC Rate and qualify for a rebate.

  • Receive a $500 per unit rebate for installing a 9 kilowatt (kW) to 25kW unit.
  • Receive $20 per kW rebate for installing units sized larger than 25kW.
  • A minimum 9 kW unit is required to qualify for a rebate.
  • Rebates totaling more than $10,000 require prior approval.

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:

This is not an endorsement of these sites' products or manufacturer.