Made in Italy by Dynair, these are a premium product with very low sound levels.
The manufacturing quality is excellent, and compare favorably with other acoustics in terms of sound levels, especially in the larger sizes.

See also our NEW mini-acoustic fan boxes HERE .

Download Specifications HERE

See our fan comparison chart HERE for more info.

GENERAL DESCRIPTION
The extremely low noise level makes these super-silenced boxed fans an exclusive and unequalled series.
SS-BOX fans are suitable for being installed in small exhausting plants, where limited dimensions and easy installation are also required. Other peculiar features are: the possibility of easy removal of motor-impeller assembly for maintenance, the standardized round inlet and outlet flanges and the possibility of speed regulation. They are suitable to convey clean air up to a max temperature of 40°C. They must be installed only in horizontal position.
Note: The connections to the motor are inside the unit and the wires normally exit the fan via the ducting. (Using a grommet).

Sound Levels
Note: For comparative purposes given at 3 meters.
(The manufacturer gives them at 1.5 meters)
125mm - 21 db(A) @3m - 225m3/hr
160mm - 26 db(A) @3m - 500m3/hr
200mm - 30 db(A) @3m - 900m3/hr
250mm - 29 db(A) @3m - 1150m3/hr
315mm - 35 db(A) @3m - 1500m3/hr
355mm - 34 db(A) @3m - 2200m3/hr
400mm - 36 db(A) @3m - 2800m3/hr
450mm - 35 db(A) @3m - 4100m3/hr