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Internet # 313459581

Model # CentricAir4.0(R50W)

Store SKU # 1005438121

4.0W Whole House Fan 3921 CFM (HVI-916 Certified Airflow Rating) 2-Speed Wall Switch with Timer/Temp Control R50 Damper

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  • Aluminum construction offers sturdiness and durability
  • Designed to cool and ventilate both 1- and 2-story houses
  • Comes with a 15-year fan motor warranty
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Product Details

About This Product

German made and engineered fan motor rated for 40,000-hours of operation. 5 blade, acoustically designed, precision balanced fan with wingtips makes for an ultra quiet operation. Heavy-duty fan guard for rigidity and safety. Heat resistant and sound absorbing, acoustic ducting contributes to a quiet operation. High air flow grill allows 30% more airflow than standard grills. R-50 cold weather damper powered by a commercial actuator rated for 60,000 cycles. 15-year fan motor warranty Easy Installation. No Framing Required. Fits between 16 in. and 24 in. On-Center Joists.


  • Centric air 4.0 is designed to cool 1-story homes up to 3000 sq. ft. and 2-story homes up to 4400 sq. ft.
  • 15-year fan motor warranty
  • 3921 CFM (HVI-916 certified airflow rating)
  • 623-Watt
  • 2-speed wall switch with timer & temperature control
  • R50 power actuated cold weather damper box
  • Acoustically designed, precision balanced, 5-blade fan for exceptionally quiet operation
  • German engineered, acoustically designed, precision balanced, wing tip fan blades for an exceptionally quiet operation, rated for 40,000-hours of operation, costs just pennies an hour to operate
  • Acoustical ducting for a quieter operation
  • Fits between 16 in. or 24 in. on center joists, no joist-cutting required
  • Requires 5 sq. ft. of net free attic ventilation
  • Installation typically takes just a few hours
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Product Information

Internet # 313459581

Model # CentricAir4.0(R50W)

Store SKU # 1005438121

Additional Resources



Dimensions: H 29 in, W 26 in, D 14 in


Coverage Area (Sq.Ft)


Cut-Out Width (in.)

14 in

Net-Free Area (Sq. In.)


Product Depth (in.)

14 in

Product Height (in.)

29 in

Product Width (in.)

26 in


Airflow (CFM)


Amperage (A)

5.2 A

Color Family




Decibel (Sound) Rating

48 dBA

Drive Type

Direct Drive


Corrosion Resistant, Paintable

Horsepower (hp)

1/2 hp





Max. Motor Speed (RPM)


Mounting Position


Product Weight (lb.)

59 lb



Voltage (volts)


Warranty / Certifications

Manufacturer Warranty

15 Year Fan Motor Warrany

Questions & Answers

Q:Is 3921 CFM the high setting, and does that correlate to the 5.2 amps? If so, how many CFM does the low setting move and what is the amperage?
by|Sep 8, 2022
1 Answer
Answer This Question

A:  The CFM rating on low is 2184. The amp draw on high speed is about 5.3. The amp draw on low is about 4.5.

by|Sep 8, 2022
    Q:what's the dimensions of the damper box?
    by|Aug 18, 2022
    1 Answer
    Answer This Question

    A:  14.125" wide x 28.5" long x 12" high

    by|Aug 18, 2022
      Q:What is the power draw and noise level on low? The specs only list 288W and 48dbA, which I assume is on high.
      by|Sep 20, 2021
      1 Answer
      Answer This Question

      A:  288 watts and 48 dBA is high speed. Low speed is about 47dBA and uses about 200 watts on low speed.

      by|Sep 20, 2021
        Q:1. can I order with the two speed remote control?
        by|Jul 7, 2021
        1 Answer
        Answer This Question

        A:  Yes, here's the home depot link to buy it with the 2-speed remote. https://www.homedepot.com/p/CENTRIC-AIR-2-7-R2-Whole-House-Fan-2709-CFM-HVI-916-Certified-Airflow-Rating-2-Speed-Remote-with-Timer-Temp-Control-R10-Damper-2-7A/307288071?MERCH=REC-_-searchViewed-_-NA-_-307288071-_-N&

        by|Jul 7, 2021
          Showing 1-4 of 4

          Customer Reviews

          5 out of 5

          • 5 out of 2 reviews
          • 100% recommend this product
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          Showing 1-2 of 2 reviews
          What a Difference!
          If you don’t have an attic fan, buy it now and thank me later. Intall was a breeze and the thermostat is a must have. It was a pain running the cord for the controller through the wall but I got it done. We have a 1400sqft ranch that was built in 2017. Im glad we went with the 3.4W. Any less powerful and regret would have set in. After a month of testing, my AC usage has been cut in half! At this rate, it will pay for itself in 3-4 years.
            • Recommended
            Fan is quiet yet moves enough air to ventilate the...
            Fan is quiet yet moves enough air to ventilate the whole house and the control is awesome, set a temperature at night and it will maintain that temp and shut off automatically.
            • Verified Purchase
            Showing 1-2 of 2 reviews