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QuietCool AFR SLR-40 Roof Mount Solar Attic Fan - 40 Watt Adjustable Panel - Included AC/DC Inverter for 24/7 Runtime - Thermostat Controlled

4.4 4.4 out of 5 stars 246 ratings

Currently unavailable.
We don't know when or if this item will be back in stock.
Brand Quietcool
Color black
Electric fan design Exhaust Fan
Power Source Solar Powered
Style Roof Mount
Product Dimensions 13"D x 26"W x 13"H
Room Type Attic Ventliation
Special Feature Solar Attic Fan
Wattage 40 watts
Mounting Type
Roofmounted
Controller Type
thermostatically controlled
Material
Alloy Steel, Plastic
Number of Speeds
1

About this item

  • 40-watt Solar Panel, heavy-duty steel housing
  • Ultra-energy efficient DC motor, Preset thermostat (on at 88ºF)
  • Included AC/DC Inverter for 24/7 runtime
  • Fully adjustable solar panel - up to 60º tilt and 180º rotation
  • 20 foot power cord included for easy installation

Additional Details

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Product details

  • Package Dimensions ‏ : ‎ 25.5 x 25.5 x 13 inches; 42 Pounds
  • Item model number ‏ : ‎ AFR SLR-40
  • Date First Available ‏ : ‎ August 29, 2019
  • Manufacturer ‏ : ‎ QC Manufacturing, Inc.
  • ASIN ‏ : ‎ B07X4BRWLC
  • Customer Reviews:
    4.4 4.4 out of 5 stars 246 ratings

From the brand


Product Description

The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked.
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Cool & Ventilate Your Attic

Cool your attic by up to 30-50ºF and within 10ºF of outside temperature when properly sized.

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30% Less Energy

Save up to 30% on A/C usage and even more on preventative care that protects your attic, home, and A/C from costly damages.

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Easy Installation

QuietCool smart attic fans are easy to install for the skilled do-it-yourselfer and licensed contractor alike.

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Motor Technology

Ultra-Energy Efficient DC Motors is a revolutionary benefit that lets our fans push up to 10x more air while using less energy.

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Solar Tax Credit

Our solar-powered attic ventilation products may qualify for a Federal Tax Credit.

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Lower Attic Temperature 30-50º

Up to 10x more efficient, moving up to 2x more air than comparable attic fans. Efficiently cools and ventilates the attic by up to 30-50ºF.

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Extend the life of your roof

It helps lower humidity & temperature, inhibiting mold growth and minimizing thermal stress on roofing materials, thus extending the roof's lifespan.

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Avoid Attic Mold & Roof Damage

It helps lower humidity & temperature, inhibiting mold growth and minimizing thermal stress on roofing materials, thus extending the roof's lifespan.

Attic Fan Comparison

afrslr

AFR SLR-40

slr curb

SLR-CRB-2424

afg slr

AFG SLR-40

afrsmtpro3.0

AFR SMT PRO-2.0

afrsmtes

AFR SMT ES-2.0

afrsmtpro2.0

AFR SMT PRO-1.3

Customer Reviews
4.4 out of 5 stars
246
4.4 out of 5 stars
233
4.4 out of 5 stars
85
4.4 out of 5 stars
85
4.4 out of 5 stars
85
Price
$299.00 $299.00 $369.00 $269.00
Covers Up To
1,500 SQFT. -- 2,000 SQFT. 2,500 SQFT. 2,500 SQFT. 1,750 SQFT.
CFM
1,104 -- 1,653 1,922 1,950 1,266
Watts (As Low As)
25.6 -- 22.1 208 25 75.5
Motor Type
DC Motor -- DC Motor PSC Motor ECM Motor PSC Motor
Motor Speeds
1 -- 1 2 2 2
Roof Mount
Roof Pitch Compatibility
3:12 - 6:12 Pitch Less than 3:12 Pitch 3:12 - 6:12 Pitch 3:12-6:12 Pitch 3:12-6:12 Pitch 3:12-6:12 Pitch

What's in the box

  • QuietCool Solar Attic Fan, Solar Panel, Mounting Hardware, Owner's Guide
  • Product guides and documents

    Looking for specific info?

    Customer reviews

    4.4 out of 5 stars
    246 global ratings

    Review this product

    Share your thoughts with other customers

    Customers say

    Customers find the electric fan to work well and reduce attic temperature. They appreciate its easy installation with clear instructions and a thick plate. Many find it quiet and well-built, though opinions vary on leakage.

    AI-generated from the text of customer reviews

    23 customers mention "Works well"23 positive0 negative

    Customers like the fan. They say it works well, has a smooth motor, and a good solar panel that works even under partial shade. The fan is quiet and efficient.

    "This Solar Powered Attic Fan Does The Job Well , It was easy to install too. It’s very quiet and moves the heat out well ...." Read more

    "Fan works well, not powerful enough to keep up with rising temperatures past 85 ambient outside...." Read more

    "Works Great! Much, much better than my old one...." Read more

    "Pros: Thick plate. Smooth ecm motor. Very good solar panel that works even under partial shade. Hybrid power system. Very quiet...." Read more

    18 customers mention "A/c temperature"18 positive0 negative

    Customers appreciate the air conditioning temperature of the fan. They say it helps cool the second story of their home and reduces the temperature in the attic by 10 degrees. The thermostat is set to turn on at 75 degrees, so it won't run when it's cold outside.

    "...It’s very quiet and moves the heat out well . Great value too not having to rip up the roof ,Nor expensive electrical work needed ...." Read more

    "...The built-in thermostat ensures the fan turns on at around 80 degrees F. There is no way to adjust the thermostat nor force the fan on or off...." Read more

    "...It does cool down the attic, but it takes longer than advertised. I would suggest buying the non solar model with the highest cfm...." Read more

    "Works Great! Much, much better than my old one. It keeps the garage temperature the same as the outside temperature by sucking the hot air out..." Read more

    16 customers mention "Ease of installation"16 positive0 negative

    Customers find the installation easy. They say the instructions are clear and organized, and the base is easy to remove for installation.

    "This Solar Powered Attic Fan Does The Job Well , It was easy to install too. It’s very quiet and moves the heat out well ...." Read more

    "...Installation was easier than I expected. Check out the various online videos. I'm an experienced DIYer and have done reroofing repairs...." Read more

    "Was pretty easy to install, despite QuietCool's video and written instructions being pretty meager...." Read more

    "...The installation was relatively easy, as I have a composite shingle roof and new wiring." Read more

    10 customers mention "Quietness"10 positive0 negative

    Customers appreciate the quiet operation of the fan. They say it works well and they never hear it running.

    "...It’s very quiet and moves the heat out well . Great value too not having to rip up the roof ,Nor expensive electrical work needed ...." Read more

    "Fan is quiet enough. If you're on the roof or in the attic, you'll hear its hum but it's nothing overwhelming. Inside the house one can not hear it...." Read more

    "...Fan is very, very quiet...." Read more

    "...Relatively quiet, too, moving about 790 cubic feet of air per minute." Read more

    7 customers mention "Build quality"7 positive0 negative

    Customers appreciate the electric fan's build quality. They mention it's well-made, easy to install, and has a thick plate.

    "Pros: Thick plate. Smooth ecm motor. Very good solar panel that works even under partial shade. Hybrid power system. Very quiet...." Read more

    "...This product is built robust and tough. A few things I would have changed on the design but over all, good product. I found motor bracket was loose...." Read more

    "...It’s all metal and feels very sturdy. It’s great that it come with an AC plug that I can plug into the attic to run it during the nighttime...." Read more

    "Packaged well, easy install and quality unit." Read more

    7 customers mention "Leakage"3 positive4 negative

    Customers have different experiences with leakage. Some report no leaks around flashing or shingles, while others mention water coming in through the fan housing. The design seems to be poor.

    "...Easier to remove base for installation and properly sealing. Sealing the sides once installed is essential!!!..." Read more

    "Purchased fan and had it installed by a reputable roofer. The first rain the fan leaked and ruined my sheet rock...." Read more

    "...No leaks around flashing or shingles. Water is coming in through the fan housing. Poor design. Can’t believe people gave this thing a good rating." Read more

    "So excited for having this solar ventilation, but it leaks through the fan!..." Read more

    Happy so far
    5 out of 5 stars
    Happy so far
    Fan is quiet enough. If you're on the roof or in the attic, you'll hear its hum but it's nothing overwhelming. Inside the house one can not hear it. It can run on solar power alone. Depending on the sun's intensity, the motor can run at full speed or slower. The included 20V AC backup power ensures that the fan runs even on cloudy days. The built-in thermostat ensures the fan turns on at around 80 degrees F. There is no way to adjust the thermostat nor force the fan on or off. There is a bug / finger protection screen that faces the inside. The openings will keep out larger bugs and rodents but not flies, termites etc. Installation was easier than I expected. Check out the various online videos. I'm an experienced DIYer and have done reroofing repairs. You'll have to determine if it's something that you can handle yourself or have it installed.
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    Top reviews from the United States

    • Reviewed in the United States on August 13, 2024
      This Solar Powered Attic Fan Does The Job Well , It was easy to install too. It’s very quiet and moves the heat out well . Great value too not having to rip up the roof ,Nor expensive electrical work needed . Will buy again for my Garage Project next ⚒️
    • Reviewed in the United States on August 4, 2024
      The fan was only installed two days ago, but it started working immediately and within a day the attic was already cooler.
      Customer image
      Deb
      5.0 out of 5 stars Quietest Fan
      Reviewed in the United States on August 4, 2024
      The fan was only installed two days ago, but it started working immediately and within a day the attic was already cooler.
      Images in this review
      Customer image
      Customer image
      One person found this helpful
      Report
    • Reviewed in the United States on June 27, 2024
      Fan is quiet enough. If you're on the roof or in the attic, you'll hear its hum but it's nothing overwhelming. Inside the house one can not hear it. It can run on solar power alone. Depending on the sun's intensity, the motor can run at full speed or slower. The included 20V AC backup power ensures that the fan runs even on cloudy days. The built-in thermostat ensures the fan turns on at around 80 degrees F. There is no way to adjust the thermostat nor force the fan on or off. There is a bug / finger protection screen that faces the inside. The openings will keep out larger bugs and rodents but not flies, termites etc. Installation was easier than I expected. Check out the various online videos. I'm an experienced DIYer and have done reroofing repairs. You'll have to determine if it's something that you can handle yourself or have it installed.
      Customer image
      5.0 out of 5 stars Happy so far
      Reviewed in the United States on June 27, 2024
      Fan is quiet enough. If you're on the roof or in the attic, you'll hear its hum but it's nothing overwhelming. Inside the house one can not hear it. It can run on solar power alone. Depending on the sun's intensity, the motor can run at full speed or slower. The included 20V AC backup power ensures that the fan runs even on cloudy days. The built-in thermostat ensures the fan turns on at around 80 degrees F. There is no way to adjust the thermostat nor force the fan on or off. There is a bug / finger protection screen that faces the inside. The openings will keep out larger bugs and rodents but not flies, termites etc. Installation was easier than I expected. Check out the various online videos. I'm an experienced DIYer and have done reroofing repairs. You'll have to determine if it's something that you can handle yourself or have it installed.
      Images in this review
      Customer image
      Customer image
      9 people found this helpful
      Report
    • Reviewed in the United States on June 17, 2024
      Fan works well, not powerful enough to keep up with rising temperatures past 85 ambient outside. It does cool down the attic, but it takes longer than advertised. I would suggest buying the non solar model with the highest cfm. See attached picture.
      Customer image
      4.0 out of 5 stars Works well but not what they claim
      Reviewed in the United States on June 17, 2024
      Fan works well, not powerful enough to keep up with rising temperatures past 85 ambient outside. It does cool down the attic, but it takes longer than advertised. I would suggest buying the non solar model with the highest cfm. See attached picture.
      Images in this review
      Customer image
      Customer image
      8 people found this helpful
      Report
    • Reviewed in the United States on September 28, 2023
      Was pretty easy to install, despite QuietCool's video and written instructions being pretty meager. There's a few freelance installation videos on youtube, all with different details.

      Fan is very, very quiet. I can't hear it in the room beneath it, and actually thought it wasn't running until I climbed on the roof and checked.

      I noticed the difference in the interior temperature immediately. This house holds heat in the attic and then the entire house heats up and stays hot all night. Additionally, the AC ducting runs through the attic, and when the attic is up over 120 degrees, it takes more to keep that AC air cool in the ducts. I haven't had to run the AC since installing this fan. The house temp is about 9-10 degrees cooler with this fan in service. I do plan to run the included AC adapter to a plug and then to a switch down to the hallway so that I can run the fan when I want.

      Overall I'm really pleased with this solar powered attic fan. It's gonna lower my electric bill for sure.
      13 people found this helpful
      Report
    • Reviewed in the United States on December 14, 2024
      Purchased fan and had it installed by a reputable roofer. The first rain the fan leaked and ruined my sheet rock. Had the roofing company come back out. The fan was installed correctly so they added some more silicone. The fan still leaked. Ended up replacing the fan with another brand and have not had any leaks.
      I contacted Quite Cool company and explained what happened with the leaking fan. They have continued to give me the run around and have not returned any of my phone calls. Customer service is terrible. They will not stand by their products. The fan was still under warranty, but they did not provide a replacement fan.
    • Reviewed in the United States on December 30, 2024
      It’s on our roof and we are not able to go up there ourselves to take a photo of it
    • Reviewed in the United States on July 8, 2022
      Works Great! Much, much better than my old one. It keeps the garage temperature the same as the outside temperature by sucking the hot air out from the garage attic and bringing in fresh air through vents located low in my garage. The unit starts when the temperature gets above 88 degrees in the top of my garage and runs until the temperature gets down to 78 degrees at night and then shuts off. Recently, in July 2022, it has been turning on at about 10 AM and off at about Midnight. Relatively quiet, too, moving about 790 cubic feet of air per minute.
      10 people found this helpful
      Report