This supply air duct plenum is made of galvanized steel with 26 gauge thickness. It has a rectangular shape with dimensions of 18 inches by 28 3/4 inches by 28 inches long. The plenum is compatible with various HVAC systems including ducted evaporative cooler, packaged/rooftop furnace, ductless mini split air conditioner, and more. The plenum features both updraft and downdraft installation options, and it is designed to be used with a variety of heating and cooling systems. It is a high-quality product that provides reliable performance and efficient airflow. Whether you are a professional HVAC technician or a DIY enthusiast, this plenum is an excellent choice for your next project.
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