Duct Size 4 in.

SE90L comes with 23 Watt Compact Fluorescent Light, GU24 Base which equivalent to 100 Watt Incandescent Bulb. This fan moves 90 cubic feet air per minute (90 CFM) at a very low noise level 0.8 Sones. Recommend room size 85 sqf / 7.9 m². Vista Ultra Quiet ventilation fans are designed to provide fresher and clear air for your room at very low energy consumption too.

* Plus 4 Watt Night Light Option. Bulbs not included.