This supply air duct plenum is made of high-quality galvanized steel with a thickness of 26 gauge, ensuring durability and longevity. It measures 14 x 20 x 27 inches and has a rectangular shape, making it compatible with a variety of HVAC and refrigeration systems.

It features both updraft and downdraft installation options and is compatible with several types of heating and cooling systems, including ducted evaporative coolers, packaged/rooftop furnaces, and central air conditioners. The plenum is also suitable for use with underfloor heating systems, wall heaters, and central heating radiators, among others. This product is an excellent addition to any HVAC or refrigeration system, and its high-quality construction ensures optimal performance.