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Watch out for misleading air flow claims

In 2017 the California Energy Commission set a new requirement for whole house fan makers to more accurately report their fan performance. The commission requires that each fan maker test their fans to the Appliance Efficiency Standards HVI-916 Test Method.

For instance, QuietCool has this performance data on their site
https://quietcoolsystems.com/products/energy-saver/

QC-ES-7000 Airflow* Hi: 6878 CFM  HVI-916 Airflow (CA Title 24)** 5170 CFM
*Listed airflow specs are tested via a device that is calibrated to NIST standards.
**Recommended SQFT Coverage @ 2 CFM per SQ FT

Notice that the ** comment is an error – it has nothing to do with air flow.

It is also important to know that NIST standards do not require the same test as HVI-916 so the air flow stated is higher than what you really get in your home. What is IMPORTANT here is that both the model number (7000) and the higher air flow (6878) are misleading. The true air flow when installed in your home is the HVI-916 air flow (5170) far lower than what they imply by their model number.

SO WHEN COMPARING SOURCES FOR YOUR HOME, USE ONLY THE HVI-916 AIR FLOW.

Good news – a survey of all the other sources listed by me on this web site shows that they all are now showing true HVI-916 compliant air flow specifications.

GET AN EVALUATION OF YOUR HOME BY ME

I have been watching whole house fans being sold since 2008. I have become an expert in this field.

I have not seen many suppliers 0ffer a personal evaluation of your home.

Send me an email to kurt@wholehousefanguy.com and tell me
1. Does your home have an attic or not?
2. It is 1 story, 2 or multilevel?
3. Size of 1st story, size of the 2nd
4. Height of ceilings if not 8 feet.
5. Zip code (for weather research)
6. How many hours you run air conditioning after the outside air is cooler than inside.
7. Are you thinking about solar power?
8. Do you know that a whole house fan will reduce the cost of a solar system?