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CentricAir 4.0 Energy Saving Whole House Fan (3921 CFM HVI-916 Certified Airflow Rating)

CentricAir 4.0 energy-efficient whole house fan delivers a powerful 3921 CFM (HVI-916 certified airflow rating). It requires about 5.0 sqft of net free attic ventilation and costs about $0.12 per hour to operate. It uses 623 WATTS of power and is designed to cool 2-story homes up to 4400 sqft and 1-story homes up to 3000 sqft.

This 3921 CFM whole house fan comes with an option of a single speed remote control with timer. You can also upgrade your 4000 CFM exhaust fan with our two-speed (Hi/Low) remote with timer & temp control or two speed HI/LOW wall switch and digital timer. Also available with select CentricAir products is our exclusive cold climate damper. (See Included & Upgrade Options Below)

IMPORTANT: All CFM ratings for CentricAir have been verified by an independent testing agency authorized by the State of California as meeting the strict (HVI-916) standard. When comparing CFM (airflow) ratings against similar style whole house fans, it is important to compare the HVI-916 CFM certified airflow rating. This is the true apple to apples comparison. The following link is to the CA.Gov website and allows you to search a company’s Brand to see their products HVI-916 CFM rating  CA.Gov 

A photo of a CentricAir 4.0 whole house fan on its damper box.
The Centric Air 4.0 whole house fan mounted on its damper box. More Photos
(7 customer reviews)

Orders that include the R10 or R50 cold weather damper expected to ship 5/15/2024

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From:$1749.00 $1649.00 Sale!Choose all options above for updated pricing.


Need a professional to install your whole house fan?

Exceptional Power, Extremely Energy Efficient!

The CentricAir 4.0 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% power while using 1/3 less energy as compared to other industry standard fans.

Extreme Engineering - Built To Last, Ultra Quiet

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 49 dBA on high, the 4.0 is very 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 4.0 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 4.0 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.


3921 actual CFM (max); 2184 CFM low speed


Fits in between 16" or 24" on center joists


120 VAC, 60 Hz

Unit weight

64 lbs total

Damper box size

28" × 14" × 13.75" (L × W × H)

Grille size (outer)

16" x 30"

Required attic venting

5.0 sq. ft. net-free

Rough opening

14" × 28"


Low profile, hi-air flow, cube-core aluminum (white)


20-inch, industrial-grade motorized impeller


Remote control or wall switch


R-5 or R-10 (cold weather damper ) or R-50 (extreme cold weather damper)

Attic seal

Industrial-grade maintenance free damper


49 Decibels (dBA); 47 dBA low speed


6.13 CFM/Watt (max)

Energy use

640 Watts


15 year limited fan motor warranty. All other components and electrical parts are warranted for 1 year from date of purchase. Warranty excludes batteries.

Control Choice of:
  • Wired 1 Speed Wall Timer – Compatible with Back Draft Damper
  • Wired 2 Speed Low Voltage Wall Switch with Timer & Temperature – Compatible with All Dampers
  • 1 Speed Smart Wifi Plug – Compatible with Back Draft Damper
  • Wireless 1 Speed Remote Control with Timer – Compatible with Back Draft Damper
  • Wireless 2 Speed Plug and Play Remote Control with Timer & Temperature – Compatible with All Dampers
Damper Choice of:
  • R5 Back Draft Damper
  • R10 Cold Weather Damper
  • R50 Extreme Cold Weather Damper
Optional Wall Mount Adapter Choice of:
  • No Adapter required for ceiling installation
  • Vertical Wall Mount Adapter for Wall Installation

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

7 reviews for CentricAir 4.0 Energy Saving Whole House Fan (3921 CFM HVI-916 Certified Airflow Rating)

  1. Dave B

    Outstanding customer service, very informative, great product, exactly as described

  2. Arthur Sullivan (verified owner)

    Wonderful service!! We ordered the fan on Thursday and arrived Monday morning. Just in time for our heatwave. I spent the day installing it and that night we tried it out for the first time. My wife was a happy camper because she could actually sleep and not hear the noise of the box fan in the window. At first she was skeptical about this fan and would it would work in our large house. Especially since our bedroom is upstairs where all the heat goes. She can’t believe that in under 30 minutes we can have the entire upstairs cooled off and then the downstairs in only a short time after. We don’t know why more people don’t install a system like this one. It is ten times better then air conditioning. With air conditioning you just get stale air blowing around not very good for your health. But with the Centric whole house fan it is fresh air from outside. We cannot wait to try it in the winter when the house needs a good airing out. Another positive about this product is that our energy bill will reasonable compared to if we had air conditioning. So as I said, this is an excellent product, great customer service and a must for every home that wants to stay cool in the summer and have healthy air to breathe.

  3. Philip M. Duncan

    We are fans of your fans. A great whole house cooling fan. Quiet. Remote controlled. Insulated damper to keep the cold out in the winter here in Wisconsin. Plus you have great customer service. You actually answer the phone! No leaving a message. No calling a country 1/2 way around the globe to get tech support.

  4. ed stawicki

    The whole house fan I purchased was one of the best items I could have added to the home I am renovating. Like a lot of people, we have central air but nothing beats a fan that brings in the outdoor fresh air when it is appropriate. I have added a typical whole house fan to all of my previous homes but nothing compares to the Centric. The quiet operation is awesome. I can only add that the service I received regarding replacement switches was the crowning glory. This is a formula for a great company. Thank you

  5. Joseph C (verified owner)

    I recommend to others highly. The product was well made, as quiet as a whisper and, with the remote, a joy to operate.
    After about two years we experienced a problem. I called the Company. A real-life person answered and we were able to work through the issues. They sent me a new remote under warranty and the system is back up and running perfectly. What a joy not to have to deal with some stupid voice message tree with insane questions or a senseless bot wasting my time.
    You’re customer service is great!

  6. Sean Rollins (verified owner)

    This fan is really nice. It’s noticeably quieter than my friends comparable QuietCool model and is a heavier duty design as well. And it does a great job of cooling off the house. I would definitely recommend the wired 2 speed wall switch(I also ordered separately: the handheld remote and outdoor temperature sensor so I could link them together). With this setup, everything is pretty automated and worry free.

  7. B Young

    I finished installing the 4.0 (R5) fan a couple of weeks ago, and I would like to let you know how pleased I am with the unit. It is amazingly quiet and very easy to operate. The system is so efficient that I usually only need to run it for less than an hor. The instructions were very easy to understand and the installation was quite easy; the only problems I encountered were with our house. It is really a well designed and high quality system that I would highly recommend to anyone.
    Thank you for a great system

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Money Back Guarantee 15 Year Limited Warranty Assembled in the USA Caution: Make sure the fan you buy correctly states its airflow rating.
Included (Control & Damper)
Insulated R5 Gravity Backdraft Damper
Back Draft Damper — No Charge

Industrial grade gravity fed back draft damper requires no power and is standard with all CentricAir whole house fans. The R5 insulated gravity back draft damper is designed keep attic air from entering the living space when the whole house fan is not in use.

Includes one of the following controls:
Single Speed Wall Timer
Single Speed Wall Timer — No Charge

The single speed whole house fan timer allows you to operate the fan on high speed. Countdown digital wall timer. Fits in a single gang box.


Wireless Single Speed Remote Control with Timer
Wireless Single Speed Remote Control with Timer — No Charge

Plug & Play. No Wires To Run. Just plug into an outlet.

Our wireless whole house fan single speed remote control with timer allows you to operate the fan up to 100 feet away.

Make your system more convenient to use and eliminate the need to cut holes and run wires down the wall with…


Smart Wi-Fi Control
Smart Wi-Fi Control — No Charge
    • Control your whole house fan from anywhere using your smartphone with this Smart whole house fan control
    • Power on or off. Set schedule and run time
    • Single speed operation. Runs the fan at high speed only.
    • Easy setup with no hub required
    • Smart plug included
    • Compatible with Alexa, Google Assistant…
Upgrade Options
Upgrade your included control to one of these options:
Plug & Play Wired Two-Speed Wall Switch with Temperature and Timer (1-12 hours)
Plug & Play Wired Two-Speed Wall Switch with Temperature and Timer (1-12 hours)$97

Two-speed wall switch with 50′ Cable. Temperature, Timer and Speed Control. Improves Comfort and Energy Efficiency. Plug & Play Connection. Eliminates Installing and Wiring Line Voltage Timer and Speed Switch. Purchase this whole house fan wall switch online.

Two-Speed Wireless Remote with Temperature & Timer (1-12 hours)
Two-Speed Wireless Remote with Temperature & Timer (1-12 hours)$197

Wirelessly controls whole house fan using built-in timer or by temperature and can be operated from anywhere in the home. Never overcools the home and eliminates homeowner having to get up to adjust a timer. Never wastes energy because fan only runs when needed. Simple and Fast Installation - Eliminates wiring and installing a timer…

Upgrade or Wall Mount Your Damper
Cold Climate Damper (Ceiling or Wall Mount)
Cold Climate Damper$225$275
Designed for cold climates, the Cold Climate Damper (available with CentricAir 2.7, 3.4, & 4.0 and QA-Deluxe 4800, 5500 and 6500 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 air damper can be installed vertically or horizontally.
Vertical Wall Mount Adapter
Vertical Wall Mount Adapter$69

Compatible with our back draft damper, the Vertical Wall Mount Adapter lets you mount the gravity damper on a wall instead of the ceiling.