Round Flush-Mount Ceiling Diffuser - Gratka SLIM 125

No. SLIM is a diffuser - an air terminal with no motor and no electrics. On extract it works passively, driven by natural stack ventilation. On supply, pair it with an inline or central fan.

Ø150 moves more air; Ø125 is less noticeable on the ceiling. For a WC or a small bathroom, Ø125 is usually enough. For a kitchen, a large bathroom or any room with a high air-change requirement, go with Ø150.

110 mm from the slab to the finished ceiling, drywall included. That's the whole assembly.

SLIM connects directly to 60 × 204 mm flat duct, and to Ø100 or Ø125 round duct with an adapter. Adapters are in Fittings & Adapters.

No. The housing is boarded over and plastered in with the ceiling, so it goes in at the drywalling stage - before the board and before the skim. If your ceiling is already done, get in touch and we'll suggest a surface-mount option.

No. Both face plates come in the box: one finished in white, one skimmable. Your plasterer skims it with the ceiling and your painter paints it, so the vent ends up exactly the colour of the surface it sits in. Decide on site, not at checkout - the plates swap over in seconds, they're held by magnets.

Yes. The material is unaffected by humidity and condensation and cannot rust or corrode. There are no electrical parts, so bathroom zone restrictions - which apply to powered appliances - don't apply here.

Pull the face plate off with your hand - magnets, no tools - wipe both sides, click it back. The plaster and the paintwork are never touched.

Yes. The visible face is the same design at Ø125 and Ø150, and the same diffuser works on both extract and supply. Bathroom, WC, kitchen and closet can all read as one detail even when the ducting behind them is different.