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CentricAir 3.4 Whole House Fan (3387 Real CFM)

The CentricAir 3.4 whole house fan delivers a powerful 3387 real CFM and requires about 4.0 square feet of net free attic ventilation. It costs about $0.05 per hour to operate and uses 380 WATTS of power. It’s designed to cool two story homes up to 3400 sq. ft. and single story homes up to 2500 sq. ft.

CentricAir systems use a German engineered fan that provides 30% more power and use 1/3 less energy than other industry standard fans. These high efficient fans are rated for 40,000 hours of operation and come with a 15-year warranty.

Provided with the system is an industrial grade backdraft damper, sound absorbing acoustical ductwork, custom high airflow grill, on/off remote control or wall switch/timer and all necessary hardware. Also available with select CentricAir products are our exclusive two-speed remote control with timer and cold climate damper. (See included & upgrade options below)

Options & Ordering

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Features & Benefits

Exceptional Power, Extremely Energy Efficient!

The CentricAir 3.4 is a high quality, very powerful and ultra quiet alternative cooling solution. It uses a German engineered industrial grade fan motor that can provide 30% more power while using 1/3 less energy as compared to other industry standard fans.

Extreme Engineering - Built To Last, Extremely Low Noise

These high-end industrial grade motors are built to last and are rated for approximately 40,000 hours of operation. The noise level is also really something to hear – or, actually not hear. At a very quiet 52 dBA on high, the 3.4 is whisper quiet. Every aspect of this system is built to a rigorous specification suitable to demanding industrial applications and is completely maintenance free.

Heavy-duty Maintenance Free Damper

A fundamental problem with traditional whole house fans was air leakage between the attic and living spaces. This could result in dirty attic air entering your home. The 3.4 takes care of this problem with an industrial-quality damper that is thermally insulated and maintenance free. Silicone seals are provided to ensure sealing longevity; they also provide phenomenal resistance to weathering and changes in temperature. Silicone seals have an approximate service life of 30 years and remain flexible down to -40 degrees F/C.

Low Profile - High Air Flow Register

The CentricAir 3.4 comes with a high air flow register that reduces air movement noise through the register. These high-performance grills look great too, so your system looks as inconspicuous as it sounds.

Maintenance-Free Operation

The German-engineered sealed motor and damper never requires lubrication or maintenance of any type.


3387 actual CFM (max); 2409 CFM low speed
18-inch, industrial-grade motorized impeller
Energy use:
380 Watts
8.9 CFM/Watt (max)
51 Decibals (dBA); 49 dBA low speed
Attic seal:
Industrial-grade maintenance free damper
R-10 (cold climate damper only)
Remote control or wall switch
Low profile, hi-air flow, cube-core aluminum (white)
Fits in between 16" on center joists
Rough opening:
14" × 26"
Required attic venting:
4.0 sq. ft. net-free
Grille size (outer):
16" x 28"
Damper box size:
27" × 14" × 13.75" (L × W × H)
Unit weight:
52 lbs total
120 VAC, 60 Hz
15 year limited fan motor warranty. All other components and electrical parts are warranted for 1 year from date of purchase. Warranty excludes batteries.

Due to product improvements and equipment upgrades, performance ratings and specifications are subject to change without notice.


Money Back Guarantee15 Year Limited Warranty

Assembled in the USACaution: Make sure the fan you buy correctly states its airflow rating.

Included (Control & Damper)
Gravity Fed Backdraft Damper | Centricair
Back Draft Damper
Industrial grade gravity back draft damper requires no power and is standard with all CentricAir whole house fans. The gravity damper is designed keep attic air from entering the living space when the whole house fan is not in use.
Wireless Single Speed Remote Control
Single Speed Remote Control
Single speed remote control is available for FREE with all CentricAir whole house fans. It allows you to operate the fan up to 100 feet away. Make your whole house fan more convenient to use and eliminate the need to cut holes and run wires down the wall with a wireless remote control. (Not compatible with…


Single Speed Wall Timer
Single Speed Wall Timer
The Single Speed Timer allows you to operate the fan on high speed and also choose how long to run your fan (1, 2, 4, 8 hours or HOLD).
Upgrade Options
Wireless Two Speed Remote Control & Timer
Wireless Two Speed Remote Control & Timer
The CentricAir model CA1248 is a wireless two speed remote control with timer. It features an LED display so you can clearly see what speed your whole house fan is set to (HI/LOW) and how many hours (1, 2, 4, 8 hours or ON) it is set to run. 
Two-Speed Wall Switch & Timer
Two Speed Wall Switch with Timer
The two-speed wall switch & timer lets you set the speed of your fan and choose when it will shut off.
Cold Weather Damper (Ceiling or Wall Mount)
Cold Weather Damper
Designed for cold climates, the Cold Weather Damper (available with 2.7, 3.1, & 4.0 models only) is powered by a heavy-duty actuator that is tested to 60,000 cycles. The damper door is insulated to R-10, (upgradable to R-50), to help ensure an air tight seal whenever your whole house fan is not in use. The damper can be installed vertically or horizontally.
Optional Third Party Controls
WeMo for Smart Phone  | CentricAir
WeMo for Smart Phone
The Wi-Fi enabled WeMo Insight Switch connects your whole house fan to your Wi-Fi network, allowing you to turn the system on or off from your smart phone. To install WeMo Insight, simply plug the Switch into an outlet in your attic and then plug your whole house fan into the switch. WeMo is a third party device and is not sold or supported by CentricAir.