Return Air Box 750x400mm – 1 x 350mm Spigot

Return Air Box 750x400mm – 1 x 350mm Spigot

Product Description: Galvanized steel plenum box designed for HVAC air distribution systems. This unit serves as a transition adaptor between Ø350mm flexible ducting and standard commercial grilles with a nominal neck size of 750mm x 400mm.

The unit is constructed with a 70mm deep body and a centrally mounted spigot extending approximately 65mm.

Features & Specifications:

• Product Code: RAB750X400/1X350

• Application: Supply or Return Air

• Material: Galvanized Steel Sheet

• Lining: Internally lined (Black)

• Nominal Grille Size: 750mm (L) x 400mm (W)

• Duct Connection: 1 x Ø350mm Spigot

• Dimensions:

  • Box Depth: 70mm

  • Spigot Extension: ~65mm

  • Total Assembly Height: ~135mm (excluding ducting)

Note: Spigot requires mechanical fixing or taping to ductwork. Ensure ceiling void clearance accommodates the total assembly height.