Search  for anything...
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 269 reviews
Condition: New
Checking for inventory...

Notify me when this product is back in stock

$405.00
Holiday Deal · 3% off was $415.99

Buy Now, Pay Later

As low as / mo
  • – Up to 36-month term if approved
  • – No impact on credit to apply
  • – Instant approval decision
  • – Secure and straightforward checkout

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Zip, Apple Pay, and Google Pay. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Free shipping on this product

FREE 30-day refund/replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

Availability: Unavailable
Fulfilled by Amazon

Available payment plans shown during checkout

Recently Viewed

At a glance

Condition
New
Model
AFR SLR-40
Dimensions
13"D x 26"W x 13"H
Color
black
Material
Alloy Steel
Electric fan design
Exhaust Fan
Power Source
Solar Powered
In the box
QuietCool Solar Attic FanSolar PanelMounting HardwareOwner's Guide
Warranty
15 Year Panel Warranty, 15 Year Warranty, 5 Year Motor Warranty

Features 5

  • 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

Description

Day & Night Operation - Each QuietCool Solar Attic Fan comes with an AC/DC Inverter that allows your Solar Attic Fan to transition from solar power to electric power as soon as the sun goes down. Lower Attic Temperature 30-50ºF - Our Solar Roof Mount Attic Fan is the most intelligent attic fan on the market today. This fan utilizes solar power to keep your home cool & safe throughout the day. Featuring an industry-leading design, including a vortex air funnel that distributes large quantities of air evenly throughout the roof mount housing, resulting in higher airflow and efficiency. The AFR SLR-40 offers exceptional versatility with its interchangeable flashing, accommodating various roof types seamlessly. Cool your attic by up to 30-50ºF and within 10ºF of outside temperature when properly sized. 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. QuietCool smart attic fans are easy to install for the skilled do-it-yourselfer and licensed contractor alike. Ultra-Energy Efficient DC Motors is a revolutionary benefit that lets our fans push up to 10x more air while using less energy. Utilizing a large solar panel, an AC/DC Inverter, weatherproof design, and revolutionary technology, this fan provides top-tier cooling. 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. It helps lower humidity & temperature, inhibiting mold growth and minimizing thermal stress on roofing materials, thus extending the roof's lifespan. It helps lower humidity & temperature, inhibiting mold growth and minimizing thermal stress on roofing materials, thus extending the roof's lifespan. AFR SLR-40 SLR-CRB-2424 AFG SLR-40 AFR SMT PRO-2.0 AFR SMT ES-2.0 AFR SMT PRO-1.3 1. Install your attic fan according to supplied instructions and plug it in. 2. Set the thermostat or use your smart control app to operate the fan. 3. Wait 24 hours & your attic will be cooled and maintained to within 10ºF of outside temperature. The key difference between a smart attic fan and a solar attic fan is the ability to easily control the fan's operation from the convenience of your smartphone. Adjusting the fan's speed, turning it on or off, and monitoring the temperature and humidity levels in your attic is a breeze with the custom seasonal presets available. The best system combines an attic fan and an Advanced Whole House Fan to cool, ventilate, and exhaust the entire home, day and night, and year-round.

Specs 39

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

Frequently asked questions

This product is currently out of stock. Please check back later for shipping info.

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

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • Zip Pay in 4
  • Financing through Apple Pay
  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

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
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 by Fnono28
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
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 by eric jones
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 will 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 well 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 well worth the money!.... UPDATE 8/19/2026- This thing is still humming along no issues working overtime! ... show more
Reviewed in the United States on August 23, 2025 by Eddie F
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 by Maria
Only runs when plugged in.
It only runs when plugged in. I thought the electric plug was for backup when there was no sunlight but it's not. With full sunlight it won't run unless plugged in. The solar panels probably just reduce the wattage draw but it will not run on solar alone. Also we have 2-3ft of blown in insulation in the attic and you can still hear very loudly in the bedroom beneath where it's installed. Very disappointed. Not Quietcool at all. This has no adjustment for temperature or humidity. So if you live in a high humidity region it's going to run 30-40 wartts 24/7. We tried to unplug it so it would only run on the solar during the day but even with bright direct sunlight it won't run at all not even on a low speed. That being said, we increased the intake vent and it does keep our attic cooler if you don't mind a small airplane engine running on your roof all summer. The seller did not offer any compensation for the misdleasing description. ... show more
Reviewed in the United States on July 9, 2025 by Joy
Good response from seller
This model doesn't come with an adjustable thermostat. It's built in to the solar, unlike my previous Quietcool40.
Reviewed in the United States on August 11, 2026 by Kevin Kasik
How it works
Checking for inventory...