Isomax Acoustic Silenced fans
An incredibly popular choice for indoor growing being efficient, powerful and silent. Iso-Max uses high quality components and a rotor-stator system that enables it to move huge amount of air with minimal noise output.
IsoMax Fans are ideal if you want no noise, as it is a fan integrated into a silencer. It has full-metal housing for noise reduction and a special type of soundproof foam is added to assist. Highly reccommended.
The two smaller 6" & 8" fans have inbuilt fan speed controllers.