Snail-shells like the ones that are used for these fan-boxes are very quiet because of their construction and working. At the fan-box we add an isolation of foamed plastic, which literally swallows remaining noises. Meanwhile the fan-box manages to exhaust 2500 m3 per hour and therefore you gain high effectivity with a very low noise-level.
To install the fan-box right, you have to mount wall flanges to the in- and out-holes of the box. Only then you can fix the air hose to the holes.
The flanges should be wider than necessary for the holes. For a wider flange, you would need a wider exhaust hose, and the wider the hose - the lower will be the air drag inside it. A low air drag entails a low noise.
With a speed controller for your fan you can decrease energy consumption and controll the operation of the snail-shell fan.
Length x width x height = ca. 53 x 51,5 x 51,5 cm
In-hole: ca. 25 cm
Out-hole: ca. 25 cm
Power: 245 Watt
Current: 2.5 amps
|Product weight:||23,00 Kg|