Ceiling-Diffuser Plenum Box with Round Collar
The plenum box behind a 600 × 600 ceiling diffuser: a 590 × 590 × 200 box with a round collar (Ø200), lined with foil-faced insulation; the face plate is the access door for the damper.

3D illustration of the reference design
Horizontal Ceiling Type, 900 × 600 × 250, GI 0.8 mm, with Drain Tray
A horizontal ceiling fan-coil casing 900 × 250 × 600 in 0.8 mm GI, with a folded drain tray, hanger brackets, a return-air frame and inner insulation.
| Overall size (W × H × D) | 900 × 250 × 600 mm |
|---|---|
| Material and thickness | GI sheet; body 0.8 mm, door 0.8 mm, plate 2 mm |
| Protection target (confirmed by test on the order) | IP20 |
| Doors and access | 1 door(s); Two cam latches |
| Mounting | 4 external welded lugs (slots 8 × 14) |
| Finish | Galvanised as supplied |
| Product code | 8.26 |
The plenum box behind a 600 × 600 ceiling diffuser: a 590 × 590 × 200 box with a round collar (Ø200), lined with foil-faced insulation; the face plate is the access door for the damper.
A double-skin panel for air-handling units: two folded skins with a thermal break and foam between them.
A casing for a blower or fan (6-36 inch diameter): a 600 × 600 × 300 box with a round inlet cut-out, a service door and vibration isolation on the fan mount.
A casing panel for a refrigeration evaporator: 1.0 mm GI double skin with insulation, sized 900 × 450, with a drain lip and access panel.
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