Plenum-box
Purpose
Plenum boxes are designed for connecting air distribution devices (grilles/diffusers) to the duct system in supply and exhaust ventilation or air heating systems.
Construction and Materials
They are made from galvanized steel. Connection can be either lateral or top.
The inlet collar is designed for a male connection with an outer diameter -3 mm from the nominal.
Additional options include:
- Perforated sheet located inside the plenum at a diagonal for uniform distribution of the air flow across the entire surface.
- Throttle valve for regulating the supplied air volume.
- Adjustable internal damper (perforated blade, adjustment handle located inside the plenum).
- Traverse (a plate at the bottom for attaching diffusers through a central screw).
- Insulation inside the plenum to reduce noise levels.
- Flange around the perimeter (external or internal).
- Powder coating inside/outside following the RAL color catalog.
Manufacturing
Based on the installation dimensions AxB, the height H should be no less than d+50mm (for lateral connection). If the connection is top-mounted, the height can be no less than 100mm.
Example Order and Installation
Plenum-box 305x305x200h/SD/SP/T/IN/DV d-150 (RAL 9005M/9005M) ext. no. 15 – Connection dimensions 305x305 (there should always be a 5mm gap between the diffuser installation dimensions and the plenum connection dimensions), height 250mm (d-150+50).
SD – Side connection (TP – Top connection);
SP – Perforation;
T – Traverse;
IN – Insulation;
DV - Damper (AC - Adjustable damper from the inside);
d-150 - Connection diameter 150mm (actual -3mm);
RAL 9005M – Painted black inside and outside;
ext. no. 15 - 15mm external flange.
To facilitate the installation of plenum-boxes to building structures on the side faces, mounting plates are provided.
Accessories
Additional elements (options) can be included:
- Perforated plate;
- Damper instead of inlay;
- Adjustable damper;
- Traverse;
- Powder coating;
- Insulation;
- External flange.