Model # WHFS24M

Internet #100018252

Store SKU #432659

Master Flow 4500 CFM 24 in. Direct Drive Whole House Fan with Shutter
0050206023853

Master Flow

4500 CFM 24 in. Direct Drive Whole House Fan with Shutter

  • Direct drive motor with included 2-speed pull chain operation
  • 10-year parts limited warranty; 5-year labor limited warranty
  • Maximum house size for optimum performance: 2500 sq. ft.
$ 245 00
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Frequently Bought Together

Frequently Bought Together

Product Overview

  • Direct drive motor with included 2-speed pull chain operation
  • 10-year parts limited warranty; 5-year labor limited warranty
  • Maximum house size for optimum performance: 2500 sq. ft.
The Master Flow 4500 CFM 24 in. Direct Drive Whole-House Fan is a smart energy saver for any home in a climate where air conditioning costs are a concern. It allows you to beat the heat by forcing hot air out of your home through your attic space while bringing in cooler outside air through your windows and doors. This unit comes with a white shutter and features a low-vibration, direct drive mechanism for reliable performance. A minimum 1100 sq. ft. of attic space with a minimum of 1008 sq. in. of net free area attic exhaust is required for proper operation.
  • Powerfully moves air at a rate of up to 4500 CFM
  • 1/4 HP permanent split-capacitor motor helps move hot air out of your home
  • Direct drive motor design offers low vibration
  • 2-speed pull chain switch control for easy operation
  • Includes automatic ceiling shutter in white
  • Can be installed with no joist cutting
  • UL/UL Canada listed

Product Overview

  • Direct drive motor with included 2-speed pull chain operation
  • 10-year parts limited warranty; 5-year labor limited warranty
  • Maximum house size for optimum performance: 2500 sq. ft.
Model #: WHFS24M
Sku #: 432659
Internet #: 100018252

The Master Flow 4500 CFM 24 in. Direct Drive Whole-House Fan is a smart energy saver for any home in a climate where air conditioning costs are a concern. It allows you to beat the heat by forcing hot air out of your home through your attic space while bringing in cooler outside air through your windows and doors. This unit comes with a white shutter and features a low-vibration, direct drive mechanism for reliable performance. A minimum 1100 sq. ft. of attic space with a minimum of 1008 sq. in. of net free area attic exhaust is required for proper operation.

  • Powerfully moves air at a rate of up to 4500 CFM
  • 1/4 HP permanent split-capacitor motor helps move hot air out of your home
  • Direct drive motor design offers low vibration
  • 2-speed pull chain switch control for easy operation
  • Includes automatic ceiling shutter in white
  • Can be installed with no joist cutting
  • UL/UL Canada listed

Specifications

Dimensions

Cut-Out Width (in.)
0
Net-Free Area (Sq. In.)
1008
Product Depth (in.)
31.5
Product Height (in.)
9
Product Width (in.)
30.5

Details

Amperage (amps)
2.3
Color Family
Metallic
Color/Finish Family
White
Material
Galvanized Steel
Power Type
Electric Powered
Product Weight (lb.)
36lb
Recommended Sq. Ft.
2500
Returnable
90-Day
Voltage (volts)
120

Warranty / Certifications

Manufacturer Warranty
10-year Parts Limited Warranty 5-year Labor Limited Warranty

Specifications

Dimensions

Cut-Out Width (in.)
0
Net-Free Area (Sq. In.)
1008
Product Depth (in.)
31.5
Product Height (in.)
9
Product Width (in.)
30.5

Details

Amperage (amps)
2.3
Color Family
Metallic
Color/Finish Family
White
Material
Galvanized Steel
Power Type
Electric Powered
Product Weight (lb.)
36lb
Recommended Sq. Ft.
2500
Returnable
90-Day
Voltage (volts)
120

Warranty / Certifications

Manufacturer Warranty
10-year Parts Limited Warranty 5-year Labor Limited Warranty

Questions & Answers

What is the material of the SHUTTER (plastic or aluminum. Thanks

What is the material of the SHUTTER (plastic or aluminum. Thanks
Asked by: Claude
The shutter material appears to be aluminum, powder coated. It is not plastic and it is not attracted to a magnet, so I'm pretty sure it's aluminum
Answered by: DocMotors
Date published: 2018-07-24

Can this fan be installed using a wall-mounted 2-speed switch instead of the pull chain?

Can this fan be installed using a wall-mounted 2-speed switch instead of the pull chain?
Asked by: roadrunner
Yes. This unit can be install with a switch. Switch is sold separately but is worth it
Answered by: Pat
Date published: 2018-08-12

Is this fan designed to open the shutter when it is turned on simply by the force of the air that...

Is this fan designed to open the shutter when it is turned on simply by the force of the air that is being sucked through the shutter?
Asked by: chris
Yes, turning the fan on low will open the shutter. The speed can then be adjusted. If you have any other inquiries about our Master Flow products please call Technical Services at 800-211-9612.
Answered by: Master Flow
Date published: 2018-02-19

Is this fan a ceiling mount or wall mount

Is this fan a ceiling mount or wall mount
Asked by: Bigpappa
It is ceiling mount, and let me tell you how well it works..with these hot days, I turn the air conditioning on in the late am and then in the early evening we open up and turn the whole house fan on.. (you just need to crack the windows about 3 inches). It pulls in so much cold air.. when it is 65 degrees in the house, we turn the fan off... repeat as needed..
Answered by: Rae
Date published: 2018-08-16
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Customer Reviews

4500 CFM 24 in. Direct Drive Whole House Fan with Shutter is rated 3.8 out of 5 by 132.
Rated 4 out of 5 by from Noisy.... Noisy.
Date published: 2018-10-03
Rated 4 out of 5 by from My only complaint would be that the installation instructions were... My only complaint would be that the installation instructions were not great. Kind of vague and cryptic. But the fan does a great job. It moves a lot of air! It’s loud in the hallway where it’s installed but you have to expect that when you’re moving that much air.
Date published: 2018-09-25
Rated 5 out of 5 by from easy to install and louvre cover easy to modify to... easy to install and louvre cover easy to modify to place fan in a wall instead of ceiling
Date published: 2018-09-11
Rated 2 out of 5 by from Had to return this item because I have a 24... Had to return this item because I have a 24 inch hole between rafters to fit it in, and the louvers open upwards into about a 28 inch square.
Date published: 2018-08-28
Rated 3 out of 5 by from Read the instructions to understand how this unit rests upon a ceiling joist. The fan is very noi... Read the instructions to understand how this unit rests upon a ceiling joist. The fan is very noisy, even after I built an air plenum extension as per some videos I viewed about installing these units. The videos state that the farther up into the attic the fan is mounted, the quieter they are..mine was still noisy...however...it DID lower the temps in the mornings and evenings if the outside air was about 10 degrees cooler than inside. We noticed a several degree change after about 30 minutes. We installed this fan ( for a 2500 square foot house ) in ours...a 3000 square foot house. We only opened the windows in the rooms near the fans intake..because they were the ones we were concerned with. The fan was installed in a bedroom hallway.
Date published: 2018-08-23
Rated 5 out of 5 by from Installed easily with some basic drywall, electrical, and framing knowledge. House now cools dow... Installed easily with some basic drywall, electrical, and framing knowledge. House now cools down quickly when outside air is colder than it is indoors. Took a few passes walking underneath it to not be nervous about me accidentally throwing my hang up into a massive metal fan spinning a couple of feet above. =)
Date published: 2018-08-21
Rated 4 out of 5 by from Nice fan, building a box around rafters was a little... Nice fan, building a box around rafters was a little more difficult. But turned out great. Shutters are nice.
Date published: 2018-08-21
Rated 1 out of 5 by from The motor worked for five days before dying. I’ll drive... The motor worked for five days before dying. I’ll drive 25 miles to the nearest Homedepot so that I can swap motors. For the inconvenience alone this product gets one star. However, when it was working, it was great lowering the temperature of the house 17-20 degrees. But we also use an attic fan.
Date published: 2018-08-08
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