The Master Flow 20 in. x 25 in. Dual Filter Plenum Kit is an air return plenum. The plenum is lined with R-6 duct liner to eliminate the need for wrapping. It allows the user to install a 1 in. filter or a 4 in. filter (filters not included). The kit is shipped knocked down. Assembly is required for installation. The removal of a partial cover allows the plenum to fit over air system.
- 28 gauge galvanized steel construction
- Pre-insulated with 1-1/2 in. duct liner (R6.0 value)
- Assembled dimensions: 30 in. tall x 20 in. wide x 25 in. deep
- Designed for 20 in. x 25 in. x 1 in. and/or 20 in. x 25 in. x 4 in. filter (not included)
- Snap lock design for easy assembly
- Installs on furnace