Frequently Asked Questions

We sell the fans for $200 each (minimum 2 fans per home). Installation is another $100 per fan, for a total installed cost of $300 each (plus HST). See our pricing page for more detail.

We recommend 2 fans for most homes. Larger homes with steeper roof slopes may need more.

Unfortunately, solar attic fans do not work on all homes. We won’t install an attic fan if it’s not right for your home. Homes with no attic spaces (such as flat roof homes or apartments, or homes with vaulted ceilings), homes with attic ridge vets (such as metal roofs), and homes with extensive shading (from large trees or other buildings) will not get any benefit from solar attic vents. We check all this out before we try to install anything.


There have been numerous studies that show solar attic fans can reduce your air-conditioning costs by about $150-$350 per year, but there are many details that make it hard to predict the savings for any given home, including size of home, efficiency of A/C unit, temperature setting, insulation levels, etc.    

·       Solar Panel: 19 Watts, 28 VOC.

·       Fan: 19 Watts, 24 Volts. Rated for 50,000 hours at up to 400 Cubic Feet per Minute (CFM).

·       Ventilation: Approx. 1,000 sq.ft. (Insulated attic area) at up to 400 (CFM).

·       CSA/ESA approval not required, as product is such low voltage.

During the cooling season, your central air conditioner uses electricity to keep your home at a comfortable temperature. How hard you’re A/C unit works depends on how much outside heat and humidity is transferred into your home. The insulation in your walls and attic resists heat transfer, but this insulation is more effective when the difference in temperature on either side of it is lower. The greenhouse effect can make your attic extremely hot in summer, putting  added pressure on your A/C unit. By venting the heat out of the attic using fans, the temperature difference is lower thereby allowing our A/C units to run less. Because these fans are solar powered, they use the free energy of the sun.

Typical attics are passively ventilated, relying on the tendency of warm air to rise to draw cooler air in the soffits while expelling hot air out the slope or ridge vents. Typically this is not sufficient to lower your cooling costs. Solar attic fans boost this process when it is needed most, during the summer when the sun is shining.

No. The solar attic fan is installed in the existing passive ventilation holes, using the existing flashing in place. This also prevents any damage to your roof and eliminates any potential for leaks.

The solar attic fans are installed from the outside and the roofer/installer only needs to have access to your roof.

Solar attic fans are small DC motor fans that are not very noisy, typically much quieter than your bathroom fans. That does not mean that they are silent or that you can’t hear them if you listen. So, if you work night shift, sleep in an upstairs bedroom during the day, and are easily awoken by noise, these fans may be an issue for you. For everyone else, you will likely never notice them.

We recommend 2 fans for most homes. Larger homes with steeper roof slopes may need more.

Solar panels can last a long time, more than 30 years, and the DC fans can last 10-15 years. So they will typically outlast your shingles.

All attics are designed to be ventilated and these solar powered vents simply add more ventilation during the summer months when the sun shines on your roof, making the attic hot. Without them, hot air builds up inside your attic and eventually impacts your home making your air conditioner have to work longer to cool it. Ventilating this heat out of your attic helps you use your air conditioner less and save you money.

Because the fans use no electricity, they cannot be Energy Star® rated.

The installers will orient the solar panels will be to maximize the summer sun. Our knowledgeable contractors will position the solar panel in a way to maximize and capture the sun’s rays to make the most of the fan when it is needed. They can be installed on any side of your roof, but the panels need to face south or south-west, at about 15 degrees off horizontal.

There are no batteries in the solar attic fan.  The unit operates solely from the solar panel that is powered by sunlight.

These solar attic fans work when needed most, when the summer sun is the hottest and shining down on your roof. In winter, the sun’s angle changes making the available power to the fan low, and as the sun sets at night, the fans will not run. This also helps extend the life of the motor, by limiting how many hours they run in a day.

The size of your home affects the number of fans needed to ventilate your attic. Typically homes should have two solar attic vents, but larger homes may benefit from as many as six. As a general rule, we recommend one attic fan for every 500 sq. feet attic space.

These fans are for sloped roofs with slope mounted attic vents. Typically this means asphalt shingle roofs. The solar panel can be angled to the position it will collect the most sunlight providing optimal venting performance on all roof slopes except flat ones.

Yes, as long as the homes have attics.  If row or townhomes do not have partition walls between the attic spaces (so the attic space is shared by all units), then we recommend installing fans above all units. This may mean talking to your neighbours.

These Solar Attic Fans require no ongoing maintenance. If a branch or leaf ends up on the panel, you should remove it.

Attic ventilation helps maintain a healthy, energy efficient home. It extends the life of your roofing shingles and underlayment and reduces moisture build up that can cause rot and mold. This is a low carbon energy saving measure that uses renewable energy.