Rapid whole-home cooling
It moves a large volume of air, so it can drop the temperature across your whole house in minutes once the evening air is cooler than inside.
Bay Area Whole House Fan Installation · Licensed · 13+ Years
Whole House Fan Installation in the San Francisco Bay Area
The Bay Area cools off at night — a whole house fan puts that free, cool air to work, flushing heat from your entire home in minutes and giving your AC a real break.
Free estimateLicensed (CSLB #1022608)Whole-home cooling13+ years experience
Free on-site estimate · No pressure · We come to you
Why It Matters
Free Cooling from the
Bay Area's Cool Evenings
A whole house fan is mounted in the ceiling between your living space and the attic. On a cool evening or morning you open a few windows and switch it on — it pulls fresh outside air in through the house and exhausts the hot, stale indoor air up into the attic and out the roof vents. In minutes it flushes the heat from your whole home, not just one room.
That makes it a natural fit for the Bay Area, where summer days are warm but evenings turn cool. Instead of running the AC late into the night, you can pull in that free cool air and give the compressor a rest. It's a different tool than an attic fan (which only ventilates the attic) or a solar attic fan — a whole house fan cools the space you actually live in.
- Cools your whole home, not just the attic
- Uses the Bay Area's free cool evening air
- Gives your AC a real break
- Low operating cost vs. air conditioning
- Fresh air exchange throughout the house
- Flushes trapped attic heat at the same time
How It Helps
What a Whole House
Fan Does for Your Home
It's whole-home cooling and fresh air in one — here's what that actually delivers.
Puts cool night air to work
Bay Area evenings turn cool even after hot days — a whole house fan captures that free air instead of paying the AC to fight the heat.
Fresh air exchange
It flushes out stale, stuffy indoor air and replaces it with fresh outside air, so the whole house feels and smells fresher.
Eases your AC load
Used on cool mornings and evenings, it lets you run the air conditioner far less — the compressor gets a break, and so do your bills.
Clears attic heat too
Because it exhausts through the attic, it also flushes the superheated air that builds up there during the day.
Low running cost
A whole house fan draws a fraction of the power of an air conditioner, so the cooling it provides costs very little to run.
Is It Right for You?
Signs Your Home Is a
Good Candidate
Whole house fans work best in the right home and climate — and the Bay Area is one of the best. These are the strongest signs it's a fit.
You lean hard on the AC
If your air conditioner runs late into the evening all summer, a whole house fan can take over once the outside air cools.
Cool nights, hot house
When it's pleasant outside after dark but your home is still holding the day's heat, that trapped heat is exactly what a whole house fan clears.
You want lower cooling bills
If summer energy bills sting, shifting even part of your cooling to a whole house fan cuts how long the AC has to run.
A home that traps heat upstairs
Two-story homes and rooms that stay hot after sunset benefit most from pulling that heat out and up through the attic.
You can open windows safely
A whole house fan needs a few open windows to draw air — ideal if your neighborhood and evenings make that easy.
You want fresh air, not just cold air
If you like the house aired out rather than recirculating the same AC air, the fresh-air exchange is a big plus.
How We Work
Our Whole House Fan Installation Process
A whole house fan only performs when it's sized right and vented right. Here's how we handle every install.
Free on-site assessment
We look at your home's size and layout, your ceiling and attic space, and — critically — whether your attic has enough exhaust venting to support the fan.
Size & select the unit
We calculate the airflow (CFM) your home needs and recommend the right whole house fan and mounting location for even, effective cooling.
Mount in the ceiling
We cut and frame the opening cleanly and mount the fan securely between your living space and the attic.
Wire & set controls
We wire the fan and install the controls (switch or timer), and add attic exhaust venting if the existing venting isn't enough.
Test & walkthrough
We verify airflow, confirm it runs quietly and correctly, clean up, and show you how to get the most out of it.
Free on-site assessmentLicensed (CSLB #1022608)Properly sized & vented
Why Attic Pros
The Bay Area's Trusted
Whole House Fan Installers
For over 13 years, Bay Area homeowners have trusted us to install attic and whole house fans that actually perform — because we size them correctly, confirm the venting supports them, and stand behind the work.
- Licensed contractor (CSLB Lic. #1022608)
- Diamond Certified & Angi Super Service Award winner
- Independently reviewed — verified Google ratings
- Right-sized and vented to actually cool your home
- Free, no-obligation on-site assessment
- Local team with 13+ years in Bay Area homes
Real Customers, Real Results
Trusted by Bay Area Homeowners
4.8
★★★★★
Based on 1,900+ verified Google reviews — trusted for whole house fans & home services across the Bay Area
Google Review
★★★★★
Finding out we had a rodent infestation for the first time was incredibly stressful, but Attic Pros made the entire process so much easier! Jeremy was very knowledgeable when help preparing the estimate and the work that needed to be done. Their team that came to perform the work—Nico Otten, Juan Rodriguez, and Antonio Lopez—were amazing from start to finish. Communication was fantastic right from the beginning. The crew was super fast, highly efficient, and left everything very clean after sanitizing our attic, crawl space, and garage. They definitely gave us total peace of mind. They were also able to finish in one day!!
Annie M
Google Review
★★★★★
Our small cottage has a very narrow attic entrance. Denis from Attic Pros was willing to try and was able to enter to clean, vacuum, and replace the old insulation. Very professional, access areas were well shielded and protected. Powerful vacuum and clean up well after themselves.
Morgan Yang
Google Review
★★★★★
Tom Best came to our house to give us an estimate on new insulation. He was on time, very thorough and provided a detailed very reasonable estimate within an hour of his visit. What more could you want?
B Kellar
Google Review
★★★★★
Samim great service my attic was left very clean meticulous. I am so happy with the work that him and his team did great service. I recommend them highly. I would give them a 10 if I could.
Darlene Galindo
Google Review
★★★★★
David from Attic Pros was professional, knowledgeable, and thorough. He clearly explained the extent of our rodent problem in the attic and showed us detailed photos and videos so we could fully understand the damage. He took the time to explain exactly what the rodents had caused and walked us through how the repairs would be completed. David was friendly, patient, and easy to talk to, making the entire process much less stressful. We really appreciated his honesty and professionalism.
Carmen Plascencia
Google Review
★★★★★
We cannot say enough good things about Attic Pros! From start to finish, it was a great experience. We initially called for attic, crawl space and duct cleaning, as well as rodent proofing (sealing vents, etc). Samim came out and did a very thorough evaluation, showing us dozens of photos of areas that needed attention. He also recommended new insulation, which we hadn’t considered and told us our dryer vent needed repair. It took us a few weeks to schedule, during which time Samim followed up periodically, never pushy, always answering our questions and providing more info. His professionalism and knowledge was a huge reason why we chose to work with Attic Pros. On the day of the job, Osman and crew cleaned the attic and crawl space and installed new installation, while Douglas repaired the dryer vent and Kevin cleaned the ducts. They did an amazing job sealing off the work areas and keeping the house clean, despite it being very messy and grueling work! They spent about 3 hours vacuuming the attic and another half a day sweeping the crawl space by hand. Their attention to detail was above and beyond what we expected. We were sooo impressed! And Samim’s recommendations were spot on - our dryer is much more efficient now and we noticed the house was cooler within hours of the new insulation being installed (it was the height of summer). We’d use and recommend them again and again!
Courtney Jung
QUESTIONS, ANSWERED
Frequently Asked Questions
Straight answers to the questions people actually ask about whole house fans — including how they differ from an attic fan and whether they can replace AC. Still unsure? Our team is happy to help.
Still have questions?
Talk to our team — we're here to help.
(800) 543-0382A whole house fan cools the space you live in: mounted in the ceiling, it pulls cool outside air through your open windows and pushes hot indoor air out through the attic. An attic fan only ventilates the attic itself — it clears attic heat and moisture but doesn't move air through your living space. Many Bay Area homes benefit from one or both; see our attic fan installation page for that side.
It can replace a lot of your AC use, but it isn't a substitute on the hottest afternoons. A whole house fan cools by bringing in outside air, so it works when the outside air is cooler than inside — which in the Bay Area is most evenings and mornings. The typical result is running the AC far less, not never.
You open a few windows and turn it on. The fan draws that cooler outside air in through the windows and across your living space, then exhausts the hot indoor air up into the attic and out the roof vents. Because it moves a large volume of air, it can flush the heat from a whole home in minutes.
Yes — that's how it works. A whole house fan needs a few open windows to pull air through the house. Without them it can't draw fresh air in, and it can depressurize the home, so open windows are part of running it correctly.
Yes, and it's the most important thing we check. The fan pushes a lot of air into the attic, so the attic needs enough exhaust venting to let that air escape. If yours doesn't, we add venting as part of the install — otherwise the fan can't perform and the attic pressurizes.
Older units had a reputation for it, but modern whole house fans — properly sized and mounted — run much quieter. Sizing matters: an undersized fan pushed to its limit is louder than a correctly sized one moving the same air comfortably, which is part of why professional sizing pays off.
No — it draws only a fraction of the power an air conditioner does, so the cooling it provides costs very little to run. Shifting cooling from the AC to the fan on cool evenings is what makes it easy on your energy use.
Most residential whole house fan installations are completed in a single visit. Timing depends on the mounting location and whether attic venting needs to be added. We'll give you a clear timeline for your home when we provide your estimate.
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Serving the Greater Bay Area & Sacramento Area
Whole House Fan Installation Across the Bay Area
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Ready when you are
Get Your Free Whole House Fan Estimate
Tell us about your home and we'll check your attic venting, size the fan to your space, and give you a clear, no-pressure estimate.