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Attic Ventilation Calculator

Which Attic Fan Do I Need?

If upstairs runs hotter than the rest of the house, what’s happening in your attic could be part of the reason. Answer a few questions about your home and we’ll size the right fan for it.

Let’s find the right Attic Breeze fan for your home.

See What My Attic Needs

What's Happening up There?

Could your attic be why your upstairs is hot?

What’s happening above your ceiling can show up in ways you might not expect. See if any of these sound familiar.

Sunlit upstairs bedroom with a ceiling fan and light streaming through the windows

Does your upstairs stay hotter than the rest of the house? 

THE HEAT MAY BE STARTING ABOVE YOU.

On a hot summer day, your attic can reach 150°F or more. With all that heat sitting above the ceiling, upstairs rooms can become harder to keep comfortable. 

Attic Breeze helps move that trapped heat out of the attic, giving your AC less heat to fight against.

Wall thermostat reading Cooling 74 with an indoor temperature of 78

Does your AC seem to run nonstop on hot days? 

Your system may be working harder than you think. 

If your attic gets extremely hot, that heat can make its way into your home, forcing your AC to run longer and work harder to keep up.

Attic Breeze helps remove excess heat from the attic, so your AC doesn’t have to.

Hallway with two open doorways, one to a sunlit bedroom and one to a green home office

Are some rooms comfortable while others never cool down? 

THE ATTIC COULD BE PART OF THE DIFFERENCE.

When some rooms are hotter than others, heat building in the attic can be part of the problem, especially in the rooms that take the most afternoon sun.

Attic Breeze helps move trapped heat out of the attic instead of letting it continue building overhead.

Dimly lit kitchen at night with a glass of water and a candle on the island

Does your house still feel hot after the sun goes down? 

Heat doesn't take the night off. 

Your roof and attic store heat all day long and release it slowly — even after the sun goes down. That stored heat keeps your home warmer, longer.

Attic Breeze helps clear out the heat your attic stored during the day so your home can cool off.

THERE'S A BETTER WAY

What if your home didn't have to fight all that heat?

Your attic can become one of the hottest spaces in your home. When that heat has nowhere to go, everything below it has to work around it.

Dark-sided two-story craftsman home at dusk with warm lit windows
Parent carrying a small child up a staircase

A second floor that's easier to cool

No more walking upstairs and immediately feeling the temperature change.

Three family members playing dominoes at a kitchen table

An AC that gets a break

Instead of running and running while you’re wondering why the house still isn’t comfortable.

Couple sitting on a patio sofa beside a lit fire pit at sunset

A home that settles down with the sun

Less heat stored overhead means you’re not still fighting the hottest part of the day hours later. 

Your home

Let’s size your attic

A few simple questions about your house. No measuring and no roofing know-how. If you don’t know an answer, say so and the calculator works it out with you.

Takes about two minutes. No sign-up and no email required.