The VENTS ТТ Silent-M family models are available in standard sizes from 100 to 450 mm with maximum air capacity up 6,510 m3/h. VENTS ТТ Silent-M fans are capable of providing high air pressure and abundant fresh air supply while keeping noise under control – from 23 to 40 dB(А) while running. This corresponds to the natural ambient noise which makes people feel comfortable.