A duct fan that can be used with or without a carbon filter. TT125 has two speeds, one with a capacity of 220m3 / h and another speed with a capcity of 280m3 /h
Intake and exhaust 125mm
Effect: 220m3 noise level 29dBA
Effect: 280m3 noise level 36dBA
To change the speed of the fan, just change the cord's position between L1 and L2.
The cord attached to the N should always be there and you can never connect L1 at the same time as L2!