Product Description
The document describes the KOOLAIR model 20-SH single deflection grille, designed for air supply with horizontally adjustable blades. It can include a volume control damper and is available in anodised aluminium or any RAL colour.

Other Models
- 20-SV: Aluminium grille with vertical blades.
- 21-SH: Steel sheet grille with horizontal blades.
- 21-SV: Steel sheet grille with vertical blades.

Mounting Options
- Pressure clips with a required mounting frame.
- Concealed fixing with a required mounting frame.
- Screw fixing with pre-drilled holes.
- Plenum box made of galvanised steel sheet with side or top entry connection.

Performance Data
The document includes a selection table with performance data for various grille dimensions, detailing air flow (Q), sound power level (LwA), total pressure loss (∆Pt), throw distance (X), and effective velocity (Vk).

General Dimensions
Dimensions are provided for opening length (L) and height (H), with additional specifications for screw fixing openings.

Selection Table Legend
- Q (m3/h): Air flow.
- LwA [dB(A)]: Sound power level.
- ∆Pt (Pa): Total pressure loss.
- X (m): Throw distance for a maximum velocity of 0.25 m/s at the occupied zone with a temperature difference of –10 ºC, installed at 2.7 m height with ceiling effect.
- Vk (m/s): Effective velocity.

For further size options, consultation with the Sales Department is recommended.