Update 8-17-18 QuietCool is now 4th in the order of highest performance because the company has just complied with the state of California by displaying the true HVI-916 air flow like the other companies do now. But QC still insists on showing a misleading higher CFM value – here is an example from their web site:
Name STL PRO-7.0X Airflow* Hi:6996 CFM HVI-916 Airflow (CA Title 24)** 5200 CFM
The star is “*Listed airflow specs are tested via a device that is calibrated to NIST standards.” which is meaningless because NIST does not have a standard for testing like the HVI-916 has.
So the list below had QC in 2nd place but now shows them 4th.
List shows highest air flow offered per HVI-916 testing.
Thorwaldson 6320 CFM (Testing done to HVI-916 and submission in process to CA CEC )
VentCool 6123 CFM
Airscape 5350 CFM
QuietCool 5170 CFM
CentricAir 3860 CFM
QA-Deluxe 3396 CFM (this is a new supplier created by the owners of CentricAir)
Tamarack 3400 CFM (this is neither a rafter mount like those above nor is it the traditional ceiling mount.)
For more about CentricAir and QA-Deluxe go here – https://www.centricair.com/new-product-line/
Here are all the other suppliers.
And in Australia
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