At Saiyan Electric, we install whole-house fans for homeowners throughout Los Angeles County who want to improve airflow and reduce AC use during cooler hours. Our licensed electricians handle the electrical work, fan installation, attic ventilation requirements, controls, and permitting when required, providing a complete installation sized for your home and its existing setup.
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A whole-house fan cools your home by bringing cooler outdoor air inside and pushing warm indoor air out through the attic. When outdoor temperatures are lower than the temperature inside your home, usually in the evening, overnight, or early morning, the fan creates continuous airflow through open windows. This can cool the living space quickly without running your air conditioner as much.
A whole-house fan can reduce or sometimes eliminate the need for AC during cooler hours, but it does not replace air conditioning in every situation. When outdoor temperatures are still high, humidity is elevated, or you need consistent cooling throughout the hottest part of the day, your AC may still be necessary. The goal is to use the fan when outdoor conditions make it more efficient to cool the home with outside air.
A whole-house fan is different from an attic fan, which is designed to ventilate the attic rather than cool the home’s living space. A whole-house fan moves air from the living area into the attic, so adequate attic ventilation is essential for proper operation. If you are looking specifically for attic ventilation, see our Attic Fan Installation service.
A whole-house fan needs more than the fan itself to work properly. Before installation, we evaluate the home’s size and layout, attic ventilation, available installation space, and electrical system to determine what equipment and modifications are needed.
We handle the complete installation, including fan selection, mounting, ductwork when required, ceiling grille, and insulated damper. The damper helps limit drafts and unwanted heat transfer when the fan is not running, which is especially important during cooler months.
We size the fan based on the home’s square footage and required CFM (cubic feet per minute). We also inspect the attic, framing, installation location, and existing ventilation to make sure the system has enough capacity to move air safely and effectively.
Most whole-house fans require a dedicated electrical circuit sized for the selected equipment. We evaluate the existing panel and wiring and can address additional electrical work, including a panel or subpanel upgrade, when the home’s electrical system requires it.
We install the appropriate controls for the fan, which may include a wall switch, multi-speed control, countdown timer, or smart control depending on the model. Control placement is planned for convenient operation without interfering with other electrical or HVAC equipment.
The attic must have enough net free vent area (NFVA) to exhaust the volume of air the fan moves. If the attic cannot release enough air, the fan can become less effective and create excessive pressure and airflow resistance. We identify ventilation limitations before installation and can coordinate additional roof or gable ventilation when needed.
If you already have a whole-house fan, a replacement may not always be necessary. We can diagnose noisy operation, failed motors or controls, leaking dampers, mounting problems, and inadequate ventilation to determine whether the existing system can be repaired or upgraded.
The right whole-house fan should provide enough airflow to cool your home effectively without being unnecessarily large or loud. Fan capacity is measured in CFM (cubic feet per minute). As a general starting point, larger homes require higher airflow capacity, but square footage is only one factor we consider when sizing a system.
| Home Size | Approximate Fan Capacity |
|---|---|
| Up to 1,000 sq. ft. | 2,000–3,000 CFM |
| 1,000–1,500 sq. ft. | 3,000–4,500 CFM |
| 1,500–2,000 sq. ft. | 4,000–6,000 CFM |
| 2,000–2,500 sq. ft. | 5,000–7,500 CFM |
| 2,500–3,000 sq. ft. | 6,000–9,000 CFM |
These ranges are a starting point, not a substitute for an on-site assessment. Ceiling height, floor plan, window placement, attic ventilation, and the amount of air the attic can exhaust can all affect the appropriate fan size.
The installation style also affects airflow and noise. Direct-mount fans are installed directly at the ceiling and typically provide strong airflow with a simpler installation, but the motor and airflow may be more noticeable in the room below. Ducted fans place the fan away from the ceiling opening and can reduce sound transferred into the living space while providing more flexibility in fan placement. We can recommend the configuration that best fits your home’s layout, attic space, and comfort preferences.
We inspect your attic, ventilation, framing, installation space, and electrical system. We also check the home layout and any conditions that could affect fan placement, sizing, or safe operation.
We recommend the appropriate fan size, CFM, installation type, and controls for your home. Your quote clearly outlines the fan, electrical work, ventilation needs, permits, and any additional work required.
When required, we handle the electrical permit and coordinate the inspection. We then schedule your installation and provide a clear installation window. Most straightforward installations can be completed in one day.
We mount the fan, complete ductwork when needed, install the ceiling grille and insulated damper, and connect the electrical circuit. We also install your selected switch, timer, or other controls and clean up the work area.
We test the fan, controls, airflow, and electrical connections to make sure everything operates properly. When required, we coordinate the final inspection and show you how to operate the system for effective cooling.
We are not a single-brand dealer. We specify the fan that fits your attic, your ceiling and your electrical panel, and we hold every model to the same bar: a published HVI-certified airflow and sone rating, an insulated motorized damper included rather than sold as an accessory, a multi-speed motor, and parts still available in five years.
Brands we commonly specify on Los Angeles County installs include QuietCool, Centric Air, AirScape, Tamarack Ventilation and Solatube.
Model lines and specifications change. We confirm the current HVI Certified Products Directory listing before specifying anything, and you should ask any contractor to do the same.
“The fan is the easy part. Whether the installation succeeds comes down to three things a good electrician checks and a bad one does not: whether your attic can vent the airflow, whether your panel can carry a new dedicated circuit, and whether anything in your house burns gas and vents by natural draft.”
Homeowners across Downey, Los Angeles, and nearby communities trust Saiyan Electric to handle the electrical and ventilation details correctly. That means sizing the circuit for the fan, verifying the required attic ventilation, handling permits when required, and making sure the installation is properly sealed and wired.
Whole-house fan installations are one part of our broader residential electrical services, which also include panel upgrades, EV charger installation, rewiring, ceiling fan installation, and electrical repair and troubleshooting.
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– Aimee., Downey
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“Michael and his crew really came through. These men have done a few different jobs for me over the past two years and I’ll certainly be calling them again if the need ever arises. If you are looking to get some electrical work done by licensed bonded and clean cut professionals that do a great job, give Saiyan Electric the opportunity to serve you, I think you’ll be happy you did. Cheers.”
– Donald., Cerritos
Most single-unit ducted installations are a one-day job on site: cut-in and mounting, duct run, grille and insulated damper, the dedicated circuit, the attic disconnect and the wall control. A direct-mount replacement on an existing circuit is usually half a day. Add a day if attic vent area has to be added, and two to three days if the panel has to be upgraded first. Permit turnaround and the inspection visit sit on top and vary by city.
Ducted, in most Los Angeles retrofits. The motor sits back in the attic on rubber isolators and connects to the grille through insulated flex duct, which is why current systems are quiet enough to sleep through on low speed. Direct-mount is right when attic clearance is tight, the roof slope is shallow, or you are replacing an existing direct-mount unit one for one. We tell you which after we have been in your attic.
Yes. It is a continuously running motor load, so it takes a dedicated branch circuit, typically 120V at 15 or 20 amps sized to the unit’s nameplate and the run length. It cannot share with bedroom receptacles, and the motor needs a disconnecting means within sight of it in the attic.
Then the panel is the project and the fan rides along with it. A maxed-out 100A service, a fuse box, or a Federal Pacific or Zinsco panel that no electrician will add a breaker to has to be dealt with before a new circuit exists. We check the panel at the assessment, before you have spent anything, and quote both parts together.
Not if it is specified properly. The system needs an insulated motorized damper that seals when the fan shuts off, plus an airtight seal at the framed ceiling opening, which is a separate thing and the one installers skip. Manufacturers publish damper values, commonly around R-5. A bare gravity louver is a permanent heat leak and we will not install one.
Very common on Los Angeles housing stock and we plan for it. The requirement is 1 square foot of net free vent area per 750 CFM of airflow, roughly 2 square feet of gross screened vent once louvers and insect screen are subtracted. Soffit vents painted shut, insulation drifted over the intake and gable vents covered by a reroof are routine finds. We measure what you have, document the shortfall, and quote the added vent area as its own line.
The arithmetic you can do yourself: a 5,000 CFM fan draws about 0.5 kW against about 3.5 kW for central air. On SCE’s TOU-D-4-9PM summer weekday rates, an overnight hour the fan takes over is worth about $1.02, and a compressor hour pushed out of the 4-to-9 p.m. on-peak window is worth about $2.03. Put realistic hours against those and you get your own number. Anyone quoting you a payback before seeing your bill is guessing.
We do, and we will give you a straight answer about whether you want one. For most Los Angeles homes the whole house fan is the better machine, because it cools your living space and flushes the attic in the same pass, while DOE Building America documents real problems with powered attic ventilators. Where an attic fan genuinely makes sense, see our attic fan installation page, and read the full comparison for the evidence.
The most useful thing you can do before spending a dollar on a whole house fan is have somebody in your attic and in front of your panel. That is what the assessment is, it is free, and it takes 60 to 90 minutes. You will leave it knowing your airflow target, whether your attic can vent it, what your panel can carry, and what the whole job costs, in writing.
(310) 780-0191
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At Saiyan Electric, we are committed to seeking first the Kingdom of God and His righteousness in all that we do. We strive to provide exceptional electrical services with integrity, professionalism, and a heart of service.
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