Furnace Return Air Plenum Fabrication

return air box with filter slot   Dan return of the green knight slot

Square Diffusers · Swirl Diffusers · Linear Slots · Air Diffusion Accessories Louvred Return Air Grille Filter 900mm x 350mm Product Code: 1606946

This is a return air box with filter grille and filter with a 20 round adapter for 20 flex duct which can be installed in a ceiling or side wall Southwark SBF30 return air support box for 24 x 8 duct with filter slot

diamond 888 slot This is a return air box with filter grille and filter with a 14 round adapter for 14 flex duct which can be installed in a ceiling or side wall Modules · 5 Gas mask air filter · 25,000 Dollars · 5 Military power filter · 3 Military corrugated tube · Skier LL3 · Level 3 Generator · Level 3 Vents