How Long Has This Form Of Home Cooling Been Used?

Before there was air conditioning, people used fans to cool their homes. Whole house fans have been used in the United States for a very long time. Within the last 15 years, fan designs and efficiencies have changed dramatically for the better.

Will Your Whole House Fans Affect The Blown-In Insulation In My Attic?

By virtue of design, our fans will have a minimal impact on attic insulation.

When Should I Use My Fan?

Typically the evening and early morning hours. Anytime the outdoor temperature is cooler than inside your home.

California Title 24 New Home Construction and Whole House Fans

by George Karonis February 17, 2025

While installing a whole house fan can offer several benefits, it is especially important in the new home constructions in California. According to California Title 24, the new homes in climate zones 8 to 14 must install a whole house fan to reduce energy consumption while improving the indoor air quality.

Climate zones 8 to 14 are located in the western U.S., especially in California where Zone 8 includes most of the Central Valley and Zone 14 encompasses the inland areas of the Central and North California with some coastal areas. The zones are commonly referenced by following the “Sunset Western Garden Climate Zones”.

California Title 24 requirements for new housing construction
California Title 24 specifies a set of standards that require the new housing constructions in the specified climate zones to install whole house fans to cool homes and attics while reducing the load on the air conditioners.

The California Title 24 requirements regarding installing a whole house fan include:

Attic venting:
The new homes must have one foot of attic venting area for every 750 CFM of air moved by a whole house fan. This will ensure sufficient air circulation in the attic, preventing excessive heat and moisture buildup.

Airflow:
The total airflow of a whole house fan must be at least 1.5 cubic feet/minute(cfm)/square foot of the conditioned floor area. A third-party HERS rater must test the airflow on the site to satisfy the building code requirements.

Control requirements:
The whole house fan must satisfy the specified control requirements with respect to the maximum wattage and sound rating.

Benefits of Installing a Whole House Fan

Installing a whole house fan can offer you benefits that include:

● Improves energy efficiency: Whole house fans push out warm stale air while bringing in fresh outdoor air without using an air conditioner. Limiting the use of an air conditioner reduces greenhouse emissions while reducing the utility bills.

● Improves indoor air quality: Whole house fans can improve the quality of the indoor air by offering better air circulation. It reduces air pollutants like toxic volatile organic compounds( VOCs) preserving the air quality.

Other ways to improve your indoor air quality are by:

● Using an attic fan to improve air circulation in the attic.

● Getting a garage exhaust fan to improve garage ventilation.

For questions related to California’s Title 24 compliance, give us a call here at WholeHouseFan.com 1-661-775-5979

California Title 24 New Home Construction and Whole House Fans

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