This popular fan certainly lives up to it’s name – it’s one of the quietest fans we’ve ever had on our test rig. It’s a lot better designed than some of the cheaper fans – it looks nice, and it’s got a clever backdraft preventer built in. It works a treat, and without the gravity vent it records about 18 l/s under real-world conditions. It’s a powerful, quiet fan that, in our simple set-up, hits the flow rate test requirements for Part F.

It’s not cheap, though! We’ll be looking for some better budget options in another review.

The built-in backdraft preventer helps this fan in our flow rate test