You get what you pay for.
Go for a quality fan that guarantees quiet.
Plus a bigger diameter vent duct is quieter.
stinkyattic Reviewed by stinkyattic on . How quiet are extraction fans? I thinking of putting a extraction fan in my Budbox to keep the temp down, at present I need to keep the flaps open with a 16" fan pointed inside the tent to achieve around about 80oc with the 400HPS lamp about 15" away from ground zero. Has anybody used either a Ruck or systemair pulling around 225m3/hr for the systemair and 350m3/hr for Ruck and achieved the goal of cooling the tent near the bottom running a 400HPS? I will also run a small fan inside to move air around. The other thing is Rating: 5