Free on-site estimate · No pressure · We come to you
★★★★★
“Attic Pros are great especially Jose Olguin. He climbed into my crawl space, took pictures, closed openings- was very thorough in making my crawl space rodent proof. Would call them again and especially ask for Jose Olguin.”
— Gonzalo Sapiz, San Jose, CA
Verified Google Review
★★★★★
“Lugerio and his crew did a great job cleaning our crawl space and Rat proofing it, so we won’t have any more unwanted guests. Thank you Attic Pros”
— Dave Council, San Jose, CA
Verified Google Review
★★★★★
“Jorge did an excellent job of fixing the many gaps in the attic, crawl spaces and exterior vents to prevent rodents from crawling into the attic walls and crawl spaces. I recommend him”
— Neeraja chandupatla, San Jose, CA
Verified Google Review
★★★★★
“Attic Pros are great especially Jose Olguin. He climbed into my crawl space, took pictures, closed openings- was very thorough in making my crawl space rodent proof. Would call them again and especially ask for Jose Olguin.”
— Gonzalo Sapiz, San Jose, CA
Verified Google Review
LICENSED CONTRACTOR
CA License #1022608
SPCB Co. Reg. #9901 (Branch 2)
Why It Matters
Why Your Home Needs Professional Attic Fan Installation
When the air in your attic stops moving, the whole house feels it — heat and moisture build up under the roofline, driving up cooling bills, feeding mold and mildew, and shortening the life of your shingles, sheathing, and insulation. A properly installed attic fan fixes the root problem: air movement.
Doing it right matters just as much. An oversized fan with too little intake pulls conditioned air out of your living space; an undersized one won't move enough air to matter. We size the system to your attic, match the fan to your roof, and balance intake and exhaust so it performs season after season.
Lower attic temperatures and cooling bills
Less humidity — less mold, mildew, and wood rot
Healthier, fresher indoor air
Longer roof and shingle life
Less strain on your AC and HVAC system
A drier attic that's far less inviting to pests
What We Install
Types of Attic Fans We Install
There's no single “best” attic fan — the right choice depends on your roof, climate, and how your attic is vented today. Here are the four we install most across the Bay Area, with the honest trade-offs of each.
☀️
Solar attic fans
Solar-powered — they run hardest exactly when your attic is hottest, at no operating cost.
Pros
Zero operating cost — no wiring to your panel
Quiet and eco-friendly
Runs automatically on sunny days
Trade-offs
Lower airflow than a wired fan
Daytime-only (some add a battery)
Needs decent roof sun exposure
⚡
Electric (powered) fans
Hard-wired and thermostat-controlled — the workhorse for large or poorly vented attics.
Pros
Highest, most consistent airflow
Runs day and night
Precise thermostat / humidistat control
Trade-offs
Adds to your electric use
Requires wiring
Needs balanced intake to work right
🏠
Gable-mounted fans
Mounts in an existing gable vent instead of the roof — clean, roof-friendly, low leak risk.
Pros
No roof penetration — lower leak risk
Often simpler to install and service
Easy upgrade to passive gable venting
Trade-offs
Ventilation less even than roof-mounted
Needs an existing or new gable vent
Airflow depends on attic layout
🌀
Whole-house fans
A ceiling fan that pulls in cool outside air to cool the whole house, not just the attic.
Attics rarely announce a ventilation problem — but your home does. If you notice any of these, it's worth a look.
🔥
Upstairs is always hotter
A superheated attic radiates down; second floors that never quite cool off are a classic sign.
💸
Rising summer cooling bills
When the attic bakes, your AC runs longer and works harder to hold the same temperature.
🥵
A hot, stuffy attic
If the attic feels like an oven on a warm afternoon, heat is building up with nowhere to go.
💧
Moisture or a musty smell
Damp insulation, condensation on the underside of the roof, or a musty odor point to trapped humidity.
🦠
Mold or mildew spots
Dark staining on rafters, sheathing, or insulation means moisture has been sitting long enough to grow.
🏚️
Curling shingles or roof wear
Uneven attic temperatures damage roofs from below — curling, blistering shingles often trace back to ventilation.
🐀
Signs of rodents or pests
Warm, humid, undisturbed attics are exactly what rodents look for; a drier, ventilated attic is far less inviting.
Spotting one or more of these? Book a free inspection and we'll tell you whether an attic fan — or a broader ventilation fix — is the right call.
How We Work
Our Attic Fan Installation Process, Step by Step
A good install is as much about assessment and balancing as it is about mounting the fan. Here's how we approach every job.
1
🔎
Free on-site assessment
We inspect your attic, roof, and existing intake/exhaust venting, note square footage and any moisture or heat problems, and confirm what the space actually needs.
2
📐
Sizing & fan selection
We calculate the airflow (CFM) your attic requires and recommend the fan type and size — solar, electric, gable, or whole-house — that fits your roof and goals.
3
⚖️
Intake/exhaust balancing
A fan is only as good as its intake. If soffit or ridge venting is blocked or insufficient, we plan added intake so the fan draws from outside — not your living space.
4
🔧
Professional installation
We mount the fan, flash and seal every roof penetration against leaks, wire and set the thermostat/humidistat on powered units, and add or clear intake venting as planned.
5
✅
Testing & walkthrough
We confirm the fan runs correctly, verify airflow and controls, clean up, and walk you through how the system works and what to expect.
Free on-site assessmentLicensed ContractorMost installs in one visit
Why Attic Pros
The Leading Attic Ventilation Specialists in the Bay Area
Serving residential and commercial clients for over 13 years, we handle the whole job — assessment, sizing, installation, and balancing — and stand behind our work.
Fully licensed contractor (CA #1022608)
Free, no-obligation on-site assessment
Right-sized, balanced ventilation — not just a fan bolted on
Commercial-grade equipment, clean installs
Craftsmanship warranty & responsive service
Local team that knows Bay Area homes
Real Customers, Real Results
Trusted by Bay Area Homeowners
4.8
★★★★★
Based on 1,900+ verified Google reviews — trusted for attic ventilation & home services across the Bay Area
Google Review
★★★★★
These guys are awesome. Super clear comms to schedule, then received an extremely thorough consultation. We eventually decided to go with them as other shops in the area didn't communicate as well as Attic Pros.
Pedro Kroeff
recently
Google Review
★★★★★
Tom from Attic Pros was great to work with! He was friendly, professional, and thorough during the inspection. He clearly explained everything he found and answered all of my questions. The whole process was straightforward. Thank you, Tom!
Daria Baevski
recently
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
recently
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
recently
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
2 weeks ago
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
3 weeks ago
QUESTIONS, ANSWERED
Frequently Asked Questions
Straight answers to the questions we hear most about attic fans and ventilation. Still unsure? Our team is happy to help.
An attic fan moves air. It exhausts the hot, humid, stale air that collects in your attic and pulls cooler outside air in through your soffit and ridge vents. That lowers attic temperature and humidity, which protects your roof and insulation, improves indoor air, and eases the load on your air conditioner.
It can help. A cooler attic means less heat radiating into your living space, so your AC cycles less and runs shorter — especially in the Bay Area's mild climate. Solar and whole-house fans move air at little to no operating cost. Actual savings depend on your home, insulation, and how your attic is vented, which is why we assess each attic individually.
An attic fan ventilates the attic — it removes heat and moisture from that space. A whole-house fan is larger and mounts in the ceiling of your living space; on cool mornings and evenings it pulls fresh outside air through open windows and exhausts hot indoor air through the attic, cooling the whole home. Many Bay Area homes benefit from one or both.
For many homes, yes. Solar attic fans run for free, add nothing to your electric bill, need no wiring to your panel, and run hardest when the sun is strongest and your attic is hottest. The trade-off is lower airflow than a wired fan and daytime-only operation (some models add a thermostat or battery). They're a great fit for attics with good roof sun exposure.
It depends on your attic's square footage and how it's currently vented — proper ventilation is about balancing exhaust with enough intake, not just adding fans. Some attics need one correctly sized fan; larger or poorly vented attics need more airflow or additional intake venting. We calculate the airflow your attic requires during the free assessment.
Yes — trapped humidity is what feeds attic mold, mildew, and wood rot. By continually exhausting moist air and drawing in drier outside air, a properly balanced attic fan keeps humidity down and framing dry. If mold is already present, we'll flag it so it can be addressed alongside the ventilation fix.
Almost always. We install roof-mounted, gable-mounted, and solar fans, and we choose the type that suits your roof to minimize penetrations and leak risk — gable-mounted units, for example, avoid cutting into the roof at all. Every roof penetration we do make is properly flashed and sealed.
Most residential attic fan installations are completed in a single visit. Timing depends on the fan type, your roof, and whether intake venting needs to be added. We'll give you a clear timeline for your specific home when we provide your estimate.
Attic fans can be installed DIY, but getting it wrong is costly: an unbalanced fan can pull conditioned air out of your home, a poorly flashed roof cut can leak, and an undersized or oversized fan won't perform. Professional installation makes sure the fan is correctly sized, the roof stays watertight, and intake and exhaust are balanced so the system works — and keeps working.
