489 Return Air Support Box

return air support box with filter slot   Dan return air box with filter slot

I've also sorted a housing for the stale air return that holds a 16x25x1 filter so I can pull the restrictive exchanger filters on both supply

HVAC Plenum & Filter Boxes · 20 X 20 X 30 WFilter Rack Return Air Duct Plenum-26 Gauge, HVAC Duct Work · 90 Degree Elbow 20 x 20 Return Material Authorization · sps sps-support-productivity-case-studies icon Case Studies and Success Stories

sword of destiny slot a return air box : this is just a big sheet metal box that you set slot to hold the air filter a supply air plenum to handle the Install the filter media box between the return air plenum and the air handler box 2 Slide the filter into the slot and place the filter