Whole House Fan Installation in San Jose, CA
When temperatures drop outside, a whole house fan can help replace warmer indoor air with cooler outdoor air.
Whole house fans give Bay Area homeowners another cooling option during cooler mornings and evenings while complementing the home's existing air conditioning system.
How Does a Whole House Fan Work?
Open Selected Windows
Cooler outdoor air needs a pathway into the home.
Turn On the Whole House Fan
The fan begins pulling outdoor air through the open windows.
Cooler Air Moves Through the Home
Cooler outdoor air replaces warmer indoor air.
Warm Air Moves Into the Attic
The fan pushes warmer indoor air into the attic.
Hot Air Exhausts Outside
The warm air exits through the home's existing attic ventilation.
Whole House Fan Safety Matters
A whole house fan moves a large volume of air and can depressurize a home if enough replacement air is not available. Homes with natural-draft or atmospherically vented fuel-burning appliances need combustion-safety consideration before installation or operation. Openings, attic exhaust area and operating instructions should follow the selected fan's requirements and the conditions verified for the home.
When Should You Run a Whole House Fan?
When it's cooler outside than it is inside.
Use it only when outdoor conditions are suitable.
Open the windows or other approved intake openings needed for the installed fan before operation. The fan should have adequate attic exhaust ventilation, and it should not be used when outdoor air quality is poor or when operation could create unsafe depressurization around natural-draft combustion appliances.
Another Way to Keep Your Home Comfortable
Cool the Home Quickly
Move large amounts of cooler outdoor air through the house.
Enjoy Cooler Evenings
Take advantage of dropping outdoor temperatures.
Bring In Fresh Air
Replace warm indoor air with outdoor air.
Run the A/C Less
Use the whole house fan instead of continuing to mechanically cool the home when outdoor temperatures are favorable.
Cool Before Bedtime
Help remove heat the house accumulated during the day.
Complement Your A/C
Use different cooling strategies depending on outdoor conditions.
A Whole House Fan Is Not an Air Conditioner.
Air Conditioner
Mechanically cools indoor air.
Best used when outdoor temperatures are hot and active cooling is needed.
Whole House Fan
Moves outdoor air through the home.
Best used when outdoor air is cooler than indoor air.
For many Bay Area homeowners, the two can work together.
Use the A/C when it's hot outside. Use the whole house fan when outdoor temperatures drop.
The Right Fan for Your Home Matters.
Whole house fans should be selected based on the home and installation conditions—not simply by choosing the largest available fan.
Air Care evaluates factors including:
- Home square footage
- Home layout
- Desired airflow
- Installation location
- Attic accessibility
- Existing attic ventilation
- Electrical requirements
- Combustion-appliance and depressurization safety
Get a Whole House Fan Estimate
A whole house fan has to fit the home's layout, attic ventilation, available installation location, electrical conditions and combustion-safety considerations. We verify those conditions before finalizing equipment and price.
Final equipment selection and pricing depend on the conditions verified at the home.
Looking to Remove Heat From Your Attic?
An attic fan works above the living space to help exhaust trapped attic heat.
Learn About Attic Fans