Plenum Heaters
Need to Heat Incoming Fresh Air in a Concealed Space That is Difficult to Access?
A plenum heater is designed to withstand dirty, mildly corrosive environments and are installed in the plenum, which is the spot in the ductwork system where ducting and the furnace join.

MODEL KBU PlatinumX BMS
- 208, 240, 480 volt
- 1,670 to 10,000 watts
Compact plenum-rated, zero-clearance freeze-protection heater approved for use in concealed areas of buildings such as an area between a finished ceiling and drop ceiling or in an open plenum. Comes standard with a provision for adding an optional 24V thermostat for remote temperature control, making it compatible with Nest Thermostats or Building Management System Integration.

Model CKL
- 208, 240, 480 volt
- 30,000 to 240,000 watt
Approved for use in inaccessible areas of buildings. Can withstand dirty, dusty, moist or mildly corrosive environments. Ideal for large offices or factories.

Model MAU Series
- 208, 240, 480V volt
- 3,800 to 34,500 watts
Looking for fresh air? Exhaust systems are often very powerful, removing thousands of cubic feet of air per minute. When air is removed from your kitchen, it needs to be replaced with fresh air. King's Made in USA Make-Up Air Unit is a smart solution.