This high-quality supply air duct plenum is made of durable galvanized steel with a 26 gauge thickness. Measuring 28 x 21 x 30 inches, it is compatible with a wide variety of HVAC and refrigeration systems, including ductless mini split air conditioners, central furnaces, and whole house air conditioner and heater units. The plenum features both updraft and downdraft installation options, making it versatile and easy to install in any system. Its rectangular shape and sleek design make it a great addition to any HVAC setup. Trust the durability and reliability of this plenum for all your HVAC and refrigeration needs.
eBay