Monthly Archives: October 2018

QuietCool ads are false, Airscape, VentCool, Thorwaldson, others are truthful

Here are the top 3 sources – all telling the truth about their air flow as the California Energy Commission has requested. All the specs below are proven by testing to HVI-916. The performance shown is the same for each because the fans made by each company are the same design – 24 inch blades on 3/4 HP motors. These have shown to be the best in the industry. 

Airscape          5202 CFM
VentCool          5202 CFM
Thorwaldson   5202 CFM

QuietCool is the one company that refuses to comply with the CA Energy Commission. True, they did agree in writing in 2017 to publish their HVI-916 performance after paying  $250,000 in fines to the state, but they still publish exaggerated and false performance figures that are propagated all over the internet. 

Their model number ES-7000 has been tested to HVI-916 and pulls 5170 CFM. But the QuietCool specification sheet says it pulls 6,878 CFM on high speed. Under that QC adds “HVI-916 5170”. The result is that there are several large online retailers that have their main page saying “QuietCool ES-7000 whole house fan 6,878 CFM”. Below are some of those retailers. – they have the ES-6000 showing 5,665 CFM on the first page. – has ES-7000 at 6878 on pg 1 and HVI on pg 2. has ES=7000 at 6878 on 1st pg and HVI on pg 2. has ES-7000 on 1 st and 2nd no – this site goes to see above has ES-7000 says 7000 CFM no specs – has ES-7000 at 6878 no HVI 3rd pg to get specs – has ES4700 at full cfm and HVI lower on pg. No cfm in top selector.
Here is one retailer without QC – 

Page revised 4-16-19