Fanco TT Silent Mixflow Inline Fan

Silent! – The Silent TT is very quiet when compared to most other fans or exhaust vents I ever had, which is especially amazing considering the amount of air it moves. It looks well made and solid. I would recommend this product for underfloor or in ceiling.

Quiet and decent quality – I've added this review because there weren't any existing ones. I went with this fan for subfloor ventilation based on its promised low noise output. As promised it is very quiet, particularly on the low setting, even though it's moving large volumes of air. The unit itself seems sturdy and well made, although the box and instructions are a little 'no frills'. Note that the standard unit comes without a lead (needs to be hard wired) but you can order it from suppliers who add a lead. I'd recommend this fan if noise is a deciding factor in your ventilation system.