Return Air Boxes – Insulated

Sprayed Externally with a polystyrene insulation and available in various size

442175 Metal ReturnAirBoxInsulated 640x640
442175 Metal ReturnAirBoxInsulated 640x640

Metal Return Air Boxes sprayed externally with a polystyrene insulation.

Item #SpigotsSize (mm/inch)Spigot Sizes (mm/inch)
442175 1 550x550x250 / 22x22x10 Ø350 / Ø14
442176 1 550x550x250 / 22x22x10 Ø400 / Ø16
442253 2 550x750x250 / 22x30x10 Ø350 / Ø14
442252 1 550x750x250 / 22x30x10 Ø400 / Ø16
442251 1 550x750x250 / 22x30x10 Ø400 / Ø16
442254 2 550x750x250 / 22x30x10 Ø400 / Ø16
442230 1 600x400x250 / 24x16x10 Ø350 / Ø14
442231 1 600x400x250 / 24x16x10 Ø400 / Ø16
442179 1 750x400x250 / 30x16x10 Ø350 / Ø14
442180 1 750x400x250 / 30x16x10 Ø400 / Ø16
442234 1 750x450x250 / 30x18x10 Ø400 / Ø16
442256 1 750x500x250 / 30x20x10 Ø400 / Ø16
442270 1 800x500x250 / 32x20x10 Ø500 / Ø20
442199 2 900x400x250 / 35x16x10 Ø350 / Ø14
442198 1 900x400x250 / 35x16x10 Ø400 / Ø16
442200 2 900x400x250 / 35x16x10 Ø400 / Ø16
442242 2 900x500x250 / 35x20x10 Ø350 / Ø14
442241 1 900x500x250 / 35x20x10 Ø400 / Ø16
442243 2 900x500x250 / 35x20x10 Ø400 / Ø16
442269 1 900x500x250 / 35x20x10 Ø500 / Ø20
442185 2 900x550x250 / 35x22x10 Ø350 / Ø14
442186 2 900x550x250 / 35x22x10 Ø400 / Ø16
442182 2 1150x550x250 / 45x22x10 Ø350 / Ø14
442183 2 1150x550x250 / 45x22x10 Ø400 / Ø16
442184 2 1150x550x250 / 45x22x10 Ø450 / Ø18