Nominal Neck Metric ( X ) | Face Size ( A ) |
150 x 150 mm | 295 x 295 mm |
225 x 225 mm | 370 x 370 mm |
300 x 300 mm | 445 x 445 mm |
375 x 375 mm | 520 x 520 mm |
450 x 450 mm | 595 x 595 mm |
* Grilles are powder coated white as standard
* The first number is for horizontal dimension and the second number is for vertical dimension
AK – Effective area
Vk – Effective velocity in m/s
X – Throw in metres correspond to a terminal velocity in occupied zone of 0.25m/s
Pressure ( Pt ) – All pressures are in Pa (N/m2)
NR – Noise level index in dB based on a room absorption and one diffuser