Best solar attic fans

In the summer, houses can get incredibly hot. Especially if your house does not have any trees around to provide some shade. That is because it sits directly in the sun, obviously. People have discovered various ways to prevent over-heating, but very few solutions provide truly efficient results. So what choice do you have?

Natural Light 36 Watts Solar Attic Fan
Industry Leading 25-year limited warranty on entire unit
Highest quality materials in any Solar Attic Fan on the market.
Optional snap-on thermostat for use in colder climates
Brightwatts Solar Gable Attic Fan
Up to 1200 sq. ft. Venting Capacity
Rust Protected Galvanized Steel Construction
17 Volts * 2.0 Amps * 24 Watt and 15.25" in Diameter
Natural Light 24 Watts Solar Attic Fan
Optional snap-on thermostat for use in colder climates (sold separately)
superb quality
No wiring required - Easily Installed

Most houses in areas where summers are harsh are equipped with air conditioning systems. It’s the obvious solution, but when it’s too hot outside, these systems work overtime to bring the temperatures down. Do you know why that is? Because everybody wants their house cool, but almost nobody ever thinks to tackle the primary cause of overheating, which is the attic temperature.

During sunny days, the roof gets what’s worse of the outside temperature. Of course, it matters what the roof is made of, but no matter what material you choose, it will still get pretty hot. That transforms your attic into an oven. The air temperature can get so high up there, that you can’t even stand to go in your attic for five minutes. What is the best solution?

Solar attic fans are the way to go. They will bring down the temperature in your attic, so none of the high temperatures reaches the ground level(s). I think it’s a brilliant idea. Not only that your house will have a more than bearable temperature, but your power bill will also be lower.

The benefits of installing a solar attic fan

You can always go for an attic fan that is driven by your house’s power system, but then what’s the point? Your purpose is to save money, not to waste them. After all, all those burning sun rays must make themselves useful. That’s why is better to go solar. Here are the primary benefits.

  • ü Go green! Renewable energy is a trend nowadays. Not only because it’s cheaper than the alternative, but people are actively caring for the environment. You may say that a solar attic fan may not make a significant difference, but a little here, a little there, and it adds up somewhere. Imagine that there are another thousand people who decide to go green. Only then the difference is noticeable.
  • ü There are a lot of people who use the attic as a proper room, someone is living in it. But during the summer that space is not livable. You cannot possibly bear the temperatures. Put an AC unit there, and it will be like throwing money out the window. It will not handle the heat wave that’s coming from above. A solar attic fan will, no doubt about it. Combine it with an AC, and space will have the perfect temperature.
  • ü Smaller power costs. Since your attic will be cooler, the temperature in your house will already be lower. Your AC won’t have to work overtime to bring it to a comfortable level. I know that usually, the heat goes up. That’s just pure physics. But as I mentioned above, your house will become a huge oven. That’s how it works. The roof will become so heated, that space underneath is unbearable to sit in. It’s only natural that some of the heat be transferred to the lower levels.But if you place a solar attic fan, you will be surprised when you open that envelope. The savings are modest, but they are still there.
  • ü A solar attic fanis safer than a powered fan, mostly because the latter can lead to the occurrence of negative pressure zones. It increases the risk of pulling conditioned air from the house into the attic. There is a chance of pulling gasses from combustion appliancesback into the house, gasses like carbon monoxide. However, solar powered fans don’t draw so much air as regular fans, so these concerns disappear entirely.

How to choose the best solar attic fan?

If you take a look at the offer, you will see that there are hundreds of models of solar attic fans, each with its own advantages and disadvantages. But here is what you need to consider to make an informed purchase.

  • ü The airflow and speed rating – this value is measured in cubic feet per hour, and it represents the quantity of air that the unit is able to replace over time. Depending on your needs, you can purchase a faster or a slower unit.
  • ü What is the surface you need cooling? The bigger the number of square feet, the bigger the fan. If necessary, you may be required to purchase two solar attic fans, not one. Make the proper measurements before you decide on a model.
  • ü Do you need a low-profileunit or a high-profile one? The first is recommended for particularly windy areas, while the second is ideal for areas where it’s less likely to be buried by snowpack on the roof.
  • ü Maybe you should consider buying a tilted angle solar attic fan. Thanks to this simple feature you will be able to optimize the panel’s access to sunrays.
  • ü Check to see if the cord from the motor to the panel its long enough. That will come in handy if you want to place the panel where it can enjoy more solar exposure.
  • ü Pay attention to the wiring. The installation should be very easy, and it shouldn’t require extra wiring from your part. Choose a model that doesn’t have to be connected to your house’s power system.

Since the solar attic fan will only work while the sun is up, it will only work during the day, clearly. But there is a trick to change that. A lot of people do this. During the day the panel collects more energy than it needs to engage the fan. That is why it is recommended to buy an energy storage unit (battery). During the day, the sun will power the fan, but it will also fill the battery. And just like that, your attic fan will work during the night as well.

What are the best attic fans

Browsing through what’s on the market can drive you crazy. There are some many. So how can you decide which is the best solar attic fan? Just look for the criteria I mentioned earlier and filter through. Here are three examples.

Natural Light 36 Watts Solar Attic Fan

Natural Light is a leading company in solar energy powered products. They reached the top by providing high-quality, reliable products. Which is probably why this unit comes with a 25-year warranty. And not only for the fan, or just the solar panel, but the entire unit.

Once you get a hold of the attic fan, you can notice that it is made of superior quality materials. Few brands provide this sturdiness. It is very easy to install. It doesn’t require specialized knowledge. As long as you are good with your hands and are familiar with a bit of DIY, you should be able to complete the installation by yourself. There is no extra wiring. What you see is what you get. All the hardware you need for the setup will be provided for you.

You have the possibility of acquiring an optional snap-on thermostat. But that is recommended for cold locations. When it’s sunny and hot all year-round, you don’t really need it. The choice is yours.

Let’s get technical. This solar attic fan will be able to cool down an attic with a surface of up to 2625 square feet. Make the necessary measurements, and if your attic exceeds this surface, the manufacturer advises that you buy two such attic fans. There is no point in trying to make it work with just one. The fan has been tested, and 2625 is as high as it can get. The fan can move up to 1628 cubic feet per minute.

The DC motor is powered by a 36-watt solar panel. The panel is adjustable, from flat to a 45-degree angle. You can even detach and mount it in a place where there is a better sun exposure. However, this solar attic fan is not to be installed on a flat roof or mounted on side walls. As long as you use it as you’re supposed to, you will be very satisfied with it.

As a bonus, a part of the investment qualifies for tax credits in the Solar Energy Systems category under Photovoltaic Systems as defined in the Energy Improvement and Extension Act of 2008. Also, you may be eligible forlocalcredits. Click here to read more reviews and buy on Amazon.

Brightwatts Solar Gable Attic Fan

The Brightwattsunit comes with an only a10-year warranty, but that does not mean the quality is inferior. Quite the contrary, the Brushless DC motor is built to last. The construction is sturdy, and the galvanized steel that it’s made of is rust protected. You will enjoy it for quite some time.

Unlike the previous attic fan, this one can handle to cool down a surface up to 1250 square feet, and the fan can move up to 1000 cubic feet per minute. Apparently, it is designed for smaller attics, but I find it to be a good thing. Not everyone has a 2500 sq ft attic. What are you supposed to do? Buy a much too big fan for half the space it can actually handle? That’s just bad investment.

You should know that the motor is protected against overheating, which I believe it’s necessary. The fan is cooling down the attic, but what is cooling down the fan? It is very easy to install, you don’t need to do extra wiring.

The panel is made of high-quality polycrystalline cells. It will resist hail, ice, and even flying debris and impact winds. It produces 12.6 watts, just enough to keep the fan going all day long. You can even add another panel if you see fit. What I liked about this solar attic fan is that it comes with a built-in thermostat, which may prove to be very useful to people who live in colder regions. Click here to read more reviews and buy on Amazon.

Natural Light 24 Watts Solar Attic Fan

I’ve been looking at solar attic fans for a few days now, and honestly, it’s pretty difficult to top Natural Light products. Everywhere I looked, people only had nice words to say about them. No faults, easy installation, and the ventilation control is as efficient as advertised. And then I said to myself, why not recommend the same product? It’s not the very same, obviously. But people with smaller attics should be able to enjoy the quality that only Natural Lights can provide.

Basically, we are talking about the same product as the first, but this one is designed for smaller spaces. It can properly ventilate an attic with a surface up to 2100 square feet, and the fan moves up to 1339 cubic feet per minute. The panel can only provide 24 watts, as opposed to the bigger one which can provide 36. It fits all roof types, except the flat ones. Click here to read more reviews and buy on Amazon.

My recommendation

I think you can guess what my choice is. I would go for the Natural Lights Solar Attic Fan every day of the week. Whichever of the two. The fact that it can be installed on almost rooftops, the easy installation, no extra wiring, the federal tax perks, and the power of this unit make it the best solar attic fan on the market.


So, if your attic gets very hot during those scorching summer days, then a solar attic fan is precisely what you need. It will keep the attic temperatures down, it protects against mold and moisture, it will give a break to your AC unit downstairs, and last, but certainly not least, will lower your power bill. From where I stand, you only have to gain from making such an investment. Click here to buy on Amazon

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