CENTRIC AIR 4.0 Whole House Fan & 2-SPEED WALL SWITCH (Cools Home up to 4400 Sq. Ft.) 3921 CFM (HVI-916) | ENERGY SAVER 623 WATTS GERMAN FAN MOTOR (Click to View Details) (FREE Expert Advice & Additional Discounts) FREE SHIPPING $25OFF J9C7W6T6DT

(13 reviews) Write a Review
64.00 LBS
Free Shipping
On Sale
  • Centric Air 4.0 with new plug-and-play one gang 2-Speed Wall Switch with multi-Function 1-8 hour timer and Temp Zone.
  • Centric Air new plug-and-play one gang 2-Speed Wall Switch with multi-Function 1-8 hour timer and Temp Zone.
  • Centric Air offer a R-50 & R-10 Cold/Hot Weather Damper that can be used in either a ceiling or wall.  (Optional) Bottom View. Call for FREE Expert Advice |  Factory Fans Direct 888-849-1233
  • NEW SILENT COOL R-5 ENERGY STAR 1" POLY FOAM DAMPER (Included) Call for FREE Expert Advice |  Factory Fans Direct 888-849-1233
  • Designer High-flow grille 16" X 30"  is designed to minimize noise from air movement (Included) Call for FREE Expert Advice |  Factory Fans Direct 888-849-1233
  • 100% Money Back Guarantee. Call for FREE Expert Advice |  Factory Fans Direct 888-849-1233
  • Assembled in the USA. Call for FREE Expert Advice |  Factory Fans Direct 888-849-1233
  • 15 Year Limited Warranty. Call for FREE Expert Advice |  Factory Fans Direct 888-849-1233
MSRP: $2,174.00
Now: $1,706.00
Was: $1,890.00
— You save $468.00


Centric Air 4.0 Whole House Fan 3921 CFM (HVI-916) to 4400 Sq. Ft. with 2-Speed Wall Switch with Timer and Temp Zone | $25 OFF COUPON J9C7W6T6DT

The Highest Quality & Quietest Whole House Fan on Market with 15 Year Warranty | 5-Blade Computed Balanced German Motor | Comes with New R-5 Energy Star 1" Poly Foam Damper with 2-Speed Wall Switch with Timer | Optional R-10 or R-50 Cold Weather Power Damper for Ceiling or Wall Mount) Call for FREE Expert Advice & Additional Discounts | FREE SHIPPING

CentricAir 4.0 whole house fan delivers a powerful 3921 CFM (HVI-916). It requires about 5.0 sq. ft. of net free attic ventilation and costs about $0.10 per hour to operate. It uses 623 WATTS of power and is designed to cool 2-story homes up to 4400 sq. ft. and 1-story homes up to 3000 sq. ft.

CentricAir whole house fans consist of a German engineered fan motor which is 30% more powerful and uses 1/3 less electricity than other whole house fan motors. These high efficient motors come with a 15-year guarantee and are rated for 40,000 hours of operation.

Included with the system is a R-5 Energy Star 1" Poly Foam industrial grade back-draft damper, sound absorbing acoustical duct-work, custom high airflow grill, 2-Speed Wall Switch and all necessary hardware. Also available with select CentricAir products are the R-10 & R-50 cold climate damper. (See included & upgrade options below)

Centric Air German Engineered Whole House Fan Motor



Included (2-Speed Remote Control & Damper)
Industrial grade gravity fed back draft damper requires no power and now comes 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.
Wall Control. Temperature, Timer and Speed Control (Hi/Low)
Wall Control. Temperature, Timer and Speed Control (Hi/Low)
Wall Control With 50' Cable Temperature, Timer and Speed Control (Hi/Low) Improves Comfort and Energy Efficiency Plug & Play Connection.  Eliminates Installing and Wiring Line Voltage Timer and Speed Switch
Upgrade Option (Cold Weather R-10 & R-50 Power Damper)
Cold Climate Damper (Ceiling or Wall Mount)
Cold Weather Damper R-10 & R-50
Designed for cold climates, the Cold Climate Damper (available with 2.7, 3.4, & 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. 

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 Wall Switch with Timer & Temperature – Compatible with All Dampers
  • Single Speed Smart Wifi Plug – Compatible with Back Draft Damper
  • Wireless 1 Speed Remote Control – Compatible with Back Draft Damper
  • Wireless 2 Speed 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.

Features  & Benefits
Exceptional Power, Extremely Energy Efficient!

The Centric Air 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% 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 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.

Two Speed Wall Switch with Timer

The 2-Speed Wall Switch with timer is the most versatile control which features an LED display and 5 Timer Functions 1, 2, 4, 8 hours or ON. On high speed the system operates at a powerful 3921 CFM. Set to low speed the system provides a comfortable flow of air while maintaining a whisper quiet noise level.

Heavy-duty R-5 Energy Star 1" Poly Foam 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 Centric Air 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.

FREE SHIPPING | Call 888-849-1233 for FREE Expert Advice & Discounts

View AllClose

Videos Hide Videos Show Videos

13 Reviews

  • 5
    Remarkably Effective | 5 Stars

    Posted by Mike J on 10th Aug 2022

    Remarkably Effective. We have had our new whole house fan for about a 3 month now and we are very happy. It is amazing what an inward airflow is generated by the fan. We find that if we turn it on before we go to bed it quickly brings the inside temperature down for a very comfortable sleep. We should have done this years ago.

  • 5
    Whole House Fan Experts

    Posted by Allan M on 7th Jun 2022

    I called Factory Fans Direct and asked for advice and really got educated in how a whole house fan works and the high quality fans that they recommend. 5 Star Service and Product.

  • 5
    Centric Air 4.0 Great Choice | Highly recommend

    Posted by Steve N on 14th May 2022

    The Centric Air 4.0 along with the wall switch was a great choice for my home, it is working well and I now do not have to have the AC on. Factory Fans Direct is a top notch well organized company and was happy to do business with them. I would highly recommend using Factory Fans Direct to make your home more comfortable.

  • 5
    Amazing Product | 5 Star

    Posted by Tony D on 11th Nov 2021

    Had my new Centric Air 4.0 installed yesterday. What a amazing product. So happy we have made the decision to purchase and install in our home. The ease of cooling the second floor from no fan to the whole house fan is night and day! Great start to a cooler night. Thank you!! 5 Star

  • 5
    Great Fan and Customer Service | $50 Referral Checks

    Posted by Ted B on 31st May 2021

    I am a very picky buyer. Mike at Factory Fans Direct took his time and explained the differences on all of the whole house fans on the market and recommended the Centric Air. I purchased the Centric Air and I am extremely happy. I also referred a friend who also bought a fan and I received a $50 check. What is better then that..

  • 5
    Really Like this Fan and Controller

    Posted by Jack M on 25th May 2021

    I had whole house fans in the past but the Centric Air is at a whole different level. German motor, computer balanced fan blades, R 5 1 inch poly foam damper and a high tech controller. What more can a man ask for..

  • 5
    This Fan is the best | Highest Quality

    Posted by Jerry K on 30th Jan 2021

    I reviewed the other whole house fans on the market and in my opinion Centric Air is the best. German motor, computer balanced fan blade, R 50 power damper and easy to operate controller. 5 Stars

  • 5
    Awesome Fan and Controller with a $50 Referral Fee

    Posted by ED P on 14th Sep 2020

    The Centric Air 4.0 with new controller is AWESOME. Factory Fan Direct also offers a $50 referral fee. I have sent two of my friends to them and we are all happy and $50 richer.

  • 5
    Cutting Edge Technology | $50 Referral Checks

    Posted by Jason T on 28th Jun 2020

    The Centric Air 4.0 with the new one gang 2 Speed wall switch is cutting edge tech. Easy to install and operate. Best whole house fan and wall switch and I refer friends and get $50 checks. Great deal..

View AllClose