Rectangular Plenum Box / Grille Box Ductwork
Distribution box with multiple spigot outlets. UK-made to DW144, made to order. Instant online price, no account needed.
A plenum box is a distribution chamber that takes one duct connection and feeds several spigot outlets, evening out pressure before the air reaches grilles or diffusers. It is the tidy way to serve multiple terminals from a single supply.
- Category
- Rectangular Ductwork
- Standard
- DW144 compliant
- Made in
- UK (Knebworth, Hertfordshire)
- Lead time
- Made to order, fast dispatch
Common uses
- Feeding ceiling diffusers and grilles
- Distributing supply air behind a linear grille
- Splitting one supply into several outlets
Sizing & specification
Specify the box dimensions and the number, size and position of spigots. Acoustic and insulated versions are available on request.
Use the online configurator to enter your dimensions and receive an instant price. No account required. Add to quote and submit directly to us.
For bespoke orders or to discuss a project, contact us or call 07710 984 957.
Rectangular Plenum Box / Grille Box — frequently asked questions
How many spigots can a plenum box have?
As many as the box face allows — tell us the count, size and layout and we will build to suit.
Can it be insulated?
Yes — acoustic and thermal lining can be added on request.
Related rectangular ductwork
- Rectangular Spigot — Circular spigot / stub connection fitted to rectangular ductwork
- Rectangular Shoe — Boot / take-off connecting a round spigot to a rectangular duct face