Return Air Boxes – 10mm Insulation
Metal Return Air Boxes sprayed externally with a polystyrene insulation
| Item # | Spigots | Size (mm/inch) | Spigot Size (mm/inch) |
|---|---|---|---|
| 442133 | 1 | 550x550x150 / 22x22x6 | Ø400 / Ø16 |
| 442134 | 1 | 550x550x150 / 22x22x6 | Ø450 / Ø18 |
| 442135 | 1 | 600x400x150 / 24x16x6 | Ø400 / Ø16 |
| 442136 | 1 | 600x400x150 / 24x16x6 | Ø450 / Ø18 |
| 442140 | 1 | 750x450x150 / 30x18x6 | Ø450 / Ø18 |
| 442141 | 1 | 750x450x150 / 30x18x6 | Ø400 / Ø16 |
| 442152 | 2 | 900x500x150 / 36x20x6 | Ø400 / Ø16 |
| 442153 | 2 | 900x500x150 / 36x20x6 | Ø350 / Ø14 |
| 442150 | 2 | 1150x550x150 / 46x22x6 | Ø400 / Ø16 |
| 442151 | 2 | 1150x550x150 / 46x22x6 | Ø450 / Ø18 |