The product is a 20" x 12" x 16" long galvanized steel plenum with updraft and downdraft installation features. It is compatible with various HVAC and refrigeration systems, including ducted evaporative cooler, packaged roof-top furnace, ductless mini split air conditioner, outdoor wood furnace, underfloor heating system, dual fuel split air conditioning system, heat pump split system, packaged roof-top air conditioner unit, central furnace, whole house air conditioner and heater, central air conditioner, wall heater, central heating radiator, and air conditioner split system. The unit quantity is 20.
eBay