Over 5,000 CFM suits large and two-story homes, or anyone who wants the house cooled fast once the evening air turns. These fans need a lot of attic vent area and several open windows, and the biggest ones are often installed as a pair.
Prices were last checked November 2, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Full ranking 5
- QuietCool Energy Saver ES-7000 RF#1 of 5Full review
The efficient version of QuietCool’s ducted fan for a large or two-story home, with a very low-power low speed for running all night.
Amazon $1,799$1,7995,170 CFM7.151.7 dBA - QuietCool Classic CL-7000 RF#2 of 5Full review
A ducted Classic fan with a 10-year warranty for a large or two-story home. It costs less up front than the Energy Saver but draws more power.
Amazon $1,449$1,4495,300 CFM4.654.3 dBA - AirScape Sierra 5300#3 of 5Full review
A premium ducted fan for a large home in a cold or mixed climate, where the motorized R13 doors earn their cost.
HVACQuick $2,289$2,2895,527 CFM5.968 dBA - AirScape Ventura 5300#4 of 5Full review
A ten-speed ducted fan for a large home in a mild climate; the uninsulated door makes it a poor fit where winters are cold.
HVACQuick $1,799$1,7995,497 CFM6.168 dBA - AirScape Ventura X9#5 of 5Full review
A ten-speed ducted fan for a large home in a mild climate; the uninsulated door makes it a poor fit where winters are cold.
HVACQuick $1,799$1,7995,212 CFM5.668 dBA
