Heatwaves are currently on the rise in some parts of the world. With this searing situation in mind, you might think about setting up a ventilation system or two to alleviate the temperature inside your house. If you have an attic at home, a powered ventilator is the best idea for minimizing this red hot summer heat.

However, before you decide to install a solar-powered attic vent, you should consider the elements that could determine whether your roof space is worth having such a system. Here are a few.

1. Your Attic’s Overall Structure

Many residential dwellings these days feature a passive built-in attic venting system. Low-temperature air moves through soffit vents in the eaves, and once the cool air is inside, it gradually heats up, ascends higher, and exits through the venting located at the roof’s gables. The air then passes through ridge vents carved into the apex of the roof or other holes in it.

attic fan types

Even if you believe that your attic has sufficient insulation, it’s still an excellent idea to inspect the entire structure of the loft so you can identify whether a powered fan is necessary.

2. How Attic Fans Works

It’s also vital that you initially familiarize yourself with the inner workings of a powered attic fan.

Generally, the device pushes out the torrid air from the roof space and brings in cool air from outdoors. This circulation blocks hot air seeping into your house and prevents the unwanted temperature rise in your living quarters. As a result, it decreases the load on your air conditioner significantly.

As per the Home Ventilating Institute (HVI), the standard for powered attic ventilators to move should be at least 700 CFM (cubic feet per minute) in an attic area measuring 1,000 square feet.

3. Which Type of Attic Fan to Use

Once you’ve finally agreed to have a fan built in the top-most part of your abode, you must also consider the type of device that best fits for long-term use.

Traditionally powered attic ventilators are usually wired directly to a thermostat. These devices can also be set up with switches while hardwired, giving you the option to control them at any time. You may also plug the fan into a nearby mounted power socket if applicable.

If a reduced charge on your electricity bill is your aim instead, a solar-powered attic fan is your ideal choice. Aside from a lowered utility bill charge, this environmentally friendly fan virtually doesn’t require wiring at all.

4. The Shortcomings of Attic Fans

Whether you’re aiming for a hardwired or solar-powered option, an attic fan is the most practical way to regulate the heat level in your home and help maintain a cool place. However, some detrimental factors could hinder the efficiency of the attic fan utility.

For example, residences with properly insulated lofts do not see a substantial decrease in their cooling load whenever they add attic fans. The insulation delays the movement of heat toward the living space, thus reducing the overall effectiveness of these devices. Attics that have nominal natural ventilation and R-19 ceiling insulation do not require powered vent fans, according to the Florida Solar Energy Center (University of Central Florida).

Houses without air-sealed roof spaces can waste an ample amount of their conditioned air from the fan’s suction, although the loss may vary on the availability of the soffit vent space.


Solar attic fans are highly effective and worth your investment only if some requirements are met. Before buying one, make sure to know the grade or level of the attic insulation and the presence of well-insulated and sealed HVAC equipment in the roof space first.

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