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Quietcool

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

  • Based on 259 reviews
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Availability: Only 8 left in stock, order soon!
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Arrives Sunday, Aug 2
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Features

  • 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

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


Recommended Uses For Product: Attic Ventliation


Mounting Type: Roofmounted


Power Source: Solar Powered


Room Type: Attic Ventliation


Special Features: Solar Attic Fan


Recommended Uses For Product: Attic Ventliation


Mounting Type: Roofmounted


Controller Type: thermostatically controlled


Number of Speeds: 1


Wattage: 40 watts


Number of Blades: 3


Air Flow Capacity: 1104 Cubic Feet Per Minute


Speed: 1 RPM


Voltage: 120


Indoor Outdoor Usage: Indoor


Control Method: Touch


Reusability: Reusable


Is Product Cordless: No


Number of Power Levels: 1


Main Power Connector Type: Standard Household Plug (Type A or Type B)


Connector Type: Standard Household Plug (Type A or Type B)


Material: Alloy Steel, Plastic


Blade Material: Plastic


Color: black


Electric Fan Design: Exhaust Fan


Style: Roof Mount


Finish Type: Unfinished


Form Factor: Roof-mounted


Theme: Energy Efficiency


Collection Name: Home


Item Dimensions D x W x H: 13"D x 26"W x 13"H


Size: 40 Watt


Brand Name: Quietcool


Included Components: QuietCool Solar Attic Fan, Solar Panel, Mounting Hardware, Owner's Guide


Model Name: AFR SLR-40


Model Number: AFR SLR-40


Manufacturer: QC Manufacturing, Inc.


Warranty Description: 15 Year Panel Warranty, 15 Year Warranty, 5 Year Motor Warranty


UPC: 811658021954


Global Trade Identification Number: 54


Part Number: AFR SLR-40


Item Type Name: Attic Fan


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Aug 2

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

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View our full returns policy here.

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Top Amazon Reviews

    • Awesome!!
I purchased this attic fan Jun 2023. Today is Aug 2025 so this review is a complete 2+ year review. Shipping great as expected, packaging was great as expected. I live in central Texas and we go through temperatures of 90 to 105+ degrees during our summers. My attic we'll surpasses that. Let me say this fan has worked flawless in the hottest summers the attic is noticeably cooler around the area where it's installed and during our summers it runs nonstop all day and won't stop until we'll in the mornings. It's quite and moves a lot of air and built like a tank. I will probably buy another 2 or 3 due to the size of my attic. Hands down we'll worth the money! ... show more
Reviewed in the United States on August 23, 2025 by Eddie F
    • Lower the temperature down the attic Lower the temperature down the attic
Review Image by Fnono28
Ease to install I just install May 2026 No noise very quiet Attic is better temperature now
Reviewed in the United States on May 5, 2026 Reviewed in the United States on May 5, 2026 by Fnono28
    • Add plenty of well placed vents and it works.
3 years of reliable operation on solar only, using no plug in power. Doesn’t run unless there’s direct sun on it but cranks up high when’s it’s really shining. Effective quiet and so far reliable. A brushless design at this cost point should work for many years, so far so good. Performance completely reliant on air vents to allow for storing air movement. We installed large soffit vents throughout so it works very well. Without ample air admittance any fan would be minimally effective and die a premature death. Don’t expect a product to defy the laws of physics people, the fan itself is only part of the solution. ... show more
Reviewed in the United States on October 6, 2025 by Florida Gators!
    • Works great, just one flaw. Works great, just one flaw.
Review Image by eric jones
I have 2 of the solar attic fans and they work great. They keep my attic 3-5 degrees of the outside temperature. Which if you know attics, they can reach 120-130 degrees. If you duct work attic furnace are located in the attic, your unit is going to work that much harder in the summer months. The only flaw is, which I notice that there are other reviews with the same issue and this is you can get water entering in where the fan exhaust the hot air. What I found out with my situation, it only happens when there is a very heavy wind, hard rain and with a steep pitched roof which I have. You can see the pitch of the roof and the flashing that roofer installed in the picture. The wind blows the rain horizontal, it bounces off the roof into the outlet of the fan. At first I thought it wasn’t installed correctly. Roofer came on 2 different occasions. Checked everything and the attic fan was installed correctly. So finally, one storm that we had with the right conditions I actually went into the attic and witnessed what was happening. So, called back the roofer who installed and explained to him what was happening and he basically said there is nothing he can do about it other then to remove it and put the roof back the way it was. I explained to him if you just put a flashing in front of the attic fan that would block the rain from coming in. Again he refused. With the benefit that these 2 attic fans installed, I was willing to try everything I could not to take them out. I called another roofer and explained to him what was happening and he has heard of this before, which the other roofer said he never seen this happen, and said he would install the flashing. Now we have had 2 storms with heavy wind and rain and no more water coming in. Hopefully this helps anyone else this this issue. Hopefully quiet cool can come up a solution for this issue. ... show more
Reviewed in the United States on April 20, 2025 Reviewed in the United States on April 20, 2025 by eric jones
    • Happy so far Happy so far
Review Image by Maria
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. ... show more
Reviewed in the United States on June 27, 2024 Reviewed in the United States on June 27, 2024 by Maria
    • Makes a big difference in interior house temperature
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. ... show more
Reviewed in the United States on September 28, 2023 by Gracee's Pa
    • Quality Product & Construction.
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 13, 2024 by John Celestre
    • LEAKS - Defective Design or failure to seal fan mount as supplied LEAKS - Defective Design or failure to seal fan mount as supplied
Review Image by Curmudgeon
Purchased 2 fans. We've had extreme drought until this weekend. First heavy rain since installation in roof. See video! READ OTHER SIMILAR REVIEWS!!! COMPANY SELLS A LEAKING FAN! - NO RESPONSE FROM QUIETCOOL!!!! QuietCool AFR SLR-40 Roof Mount Solar Attic Fan design is defective and deficient in that the fan motor columnar container, attached to the provided and pre-attached flashing does not have a grommet or other permanent sealant between the fan mount and the flashing. In Savannah, we’ve been in extreme drought since and before the fans were delivered and then installed. This past weekend, April 30th, 2 or more inches of rain finally fell with some amount of wind. The failure to have either sealant or grommet allowed free-flowing rain water to enter the attic and flood the ceiling of the room below. Video of this defect in design and deficiency in manufacturing is available to be published if there is not a responsible and effective response from the seller, Amazon, and the supplier, QuietCool. ... show more
Reviewed in the United States on May 4, 2026 Reviewed in the United States on May 4, 2026 by Curmudgeon

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