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Roof Mount Solar Attic Fan With Included Inverter

24/7 Runtime - Day and Night Operation

Our AFR SLR-40 is the best roof mount solar attic fan on the market! This fan utilizes solar power to keep your home cool and ventilated throughout the day. Better yet, with the included AC/DC inverter, your fan can continue running during nighttime hours or when the sun is not out. Utilizing a large solar panel, an AC/DC Inverter, weatherproof design, and revolutionary technology, this fan provides eco-friendly cooling all year long. This fan features an ultra-energy efficient DC Motor that allows the fan to never stop protecting your attic.

Federal Tax Credit Solar

SOLAR TAX INCENTIVES

IRS SOLAR ENERGY TAX CREDIT

Our solar-powered attic ventilation products may qualify for a Federal Tax Credit. Refer to the “Residential Energy Efficient Property Credit (Part I)” and the “Nonbusiness Energy Property Credit (Part II)” of IRS Form 5695. Although attic ventilation products are not specifically listed they may qualify for a credit.

Please download IRS Form 5695 for additional details.

Product Diagram

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afr slr 30w attic fan roof combo

Solar Panel

Polycrystalline solar panel that is up to 2-4 times the output of the industry standard.

Built-in Preset Thermostat

A mechanical thermostat that determines when your fan turns on and off (72 ºF off 83 ºF on).

AC/DC Inverter

Allows your Solar Attic Fan to run on your electrical grid so your fan can operate 24/7 even after the sun goes down.

Roof Mount Housing/Cover

Powder-coated Steel Housing/cover that protects the fan from any outdoor elements.

Vortex Air Funnel

Aerodynamic funnel that distributes large quantities of air evenly throughout the Roof Mount Housing resulting in higher airflow and efficiency.

Inverter Plug-in Cord

20-foot cord that allows you to plug and play from anywhere in the attic.

Bug Screen

Industry-leading Brushless DC Motor that allows for a long lifespan with no maintenance.

Computer Balanced Fan Blades

High-performance fan blades that cut through the air in the most efficient and effective way possible.

Ultra-Energy Efficient DC Motor

Industry-leading Brushless DC Motor that allows for a long lifespan with no maintenance.

Flashing

Flashing that prevents water from entering the attic space.

afr slr 30w attic fan roof combo

Tilt/Rotation Adjustment Bracket

Up to 60º vertical tilt and 180º horizontal rotation for maximum sunlight exposure.

Solar Panel

Polycrystalline solar panel that is up to 2-4 times the output of the industry standard.

Built-in Preset Thermostat

A mechanical thermostat that determines when your fan turns on and off (72 ºF off 83 ºF on).

AC/DC Inverter

Allows your Solar Attic Fan to run on your electrical grid so your fan can operate 24/7 even after the sun goes down.

Roof Mount Housing/Cover

Powder-coated Steel Housing/cover that protects the fan from any outdoor elements.

Vortex Air Funnel

Aerodynamic funnel that distributes large quantities of air evenly throughout the Roof Mount Housing resulting in higher airflow and efficiency.

Inverter Plug-in Cord

20-foot cord that allows you to plug and play from anywhere in the attic.

Bug Screen

Industry-leading Brushless DC Motor that allows for a long lifespan with no maintenance.

Computer Balanced Fan Blades

High-performance fan blades that cut through the air in the most efficient and effective way possible.

Ultra-Energy Efficient DC Motor

Industry-leading Brushless DC Motor that allows for a long lifespan with no maintenance.

Flashing

Flashing that prevents water from entering the attic space.

Features

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Design

Industry Leading Design for Maximum Airflow and Efficiency

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 has best-in-class performance, often beating out competitors with larger solar panels.

Efficiency

Solar + Inverter = 24/7 Cooling

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. This innovative solution to nighttime cooling allows our fans to accomplish something other solar attic fans can not; the ability to keep your attic and home cool 24/7. Using the sun during the day and the grid during the night allows the most efficient operation year around.

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Efficiency

Ultra Energy-Efficient DC Motor

The Ultra Energy-Efficient DC motor is extremely efficient while also being extremely powerful. This motor is an industry-leader that allows for a long lifespan with no maintenance. This means you get everyday cooling at the fraction of the cost of other attic fans.

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Installation

Versatile Installation Options for Any Roof Type

Furthermore, the AFR SLR-40 offers exceptional versatility with its interchangeable flashing, accommodating various roof types seamlessly. The primary flashing is designed for easy installation on shingle roofs, while the optional curb flashing provides the option to curb mount the fan to a flat or low-pitch roof using the curb flashing, with no fabrication required.

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Installation

Works with a Variety of Different Roof Types

Experience the versatility and compatibility of the revolutionary AFR SLR-40, designed to effortlessly adapt to a wide range of roof types. Whether you have a flat or pitched roof, or maybe you have a metal, asphalt, clay or countless other materials, the AFR SLR-40 seamlessly integrates with them all. Its adaptive nature eliminates any concerns about compatibility, ensuring that you can enjoy the benefits of improved attic ventilation, regardless of your roof's unique characteristics. With the AFR SLR-40, the possibilities are limitless, making it the perfect choice for any roofing situation.

How Attic Fans Work

#1 Way To Improve Your Attic

Lower Attic Temperature

Lower Attic Temperature 30-50°F

Save up to 30% on A/C Usage

Keep the world Green

Help Keep the World Green

Prolong life of the roof

Prolong the life of the roof and home

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Sizing

Size is very important

A properly sized attic fan is very important to ensure the most effective and efficient ventilation of your attic.
We recommend sizing your attic fan at .5 CFM per square foot of attic space for every 2 feet of peak attic height. This formula gives a minimum of 15 complete air exchanges per hour.
This means for a 1500 SQFT attic with a peak attic height of 4 feet, you will need an attic fan that moves at least 1500 CFM. If the peak attic height is only 2 feet, you would need at least 750 CFM. If the peak attic height is 6 feet, you would need at least 2250 CFM, and so on.
This math formula will work every time, for any size attic, and as always the more airflow the better.
This sizing formula provides a minimum of 15 complete air exchanges per hour which is equivalent to the sizing formula we use for our whole house fans.

Note that this sizing formula is based on attic square footage, not the square footage of the home. While in some cases they may be the same value, such as with a single story home, multi-story homes will have a different attic square footage than the home.

If you need assistance with sizing an attic fan, use our Attic Fan System Builder below.

AFR SLR-40 Specs

AFR SLR-40

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Upgrade your attic today!

With the AFR SLR-40 you can transform your attic ventilation experience. Enjoy the best airflow in its class, unmatched efficiency, and easy installation. Say goodbye to discomfort and excess energy consumption - upgrade to the best solar attic fan available. Choose the AFR SLR-40 today and experience a new level of comfort and convenience in your home.