Example 20 wide by 50 long attic.
Do attic fans have different sizes.
A normal sized one might only move 72 000 cfh of air through an attic.
Once a contractor knows the attic square footage the amount of necessary attic ventilation.
How much ventilation does an attic need.
Having a fan installed enables you to spend time in the attic without suffering a stifling or stuffy atmosphere.
Types of attic fans.
For a single story house this is usually the same as the square footage of the house itself plus any attached garage area.
This can enhance cooling in the home and can also help with air quality and if you choose a.
20 x 50 1 000 sq.
To determine the size of your attic multiply the width by the length of the attic floor in feet.
This means less energy is used for cooling which translates to reduced energy costs.
Attic fans are quite different.
Attic fans are a great way of cooling the attic.
Attic fans come with different models.
Some can have manual switches while others use a thermostat to turn them on and off automatically.
Also you place it on the roof top or gable mounted.
Attic power fans can also be installed on the side walls of attics but the result is the same.
A couple different fan styles can be used to help control the temperature of an attic space.
The effectiveness of an attic fan depends a lot on its type.
The starting point for any attic ventilation project is always what is the size of the attic space to be vented the international residential building code irc defines attic size in terms of its square footage length x width floor of the attic.
Usually the fan is hardwired directly into an electric circuit and is controlled by a thermostat most commonly ranging from 60 f 16 c to 120 f 49 c it may also be hardwired but controlled by a switch another popular method is to have the fan plugged into an electric socket mounted nearby.
They re installed up on a roof or through an exterior wall up in an attic.
Below are 3 common.
This unit has to be vented through the wall but its compact size helps it fit.
You can get ones.
The purpose of an attic fan is ventilation and hot air movement strictly in the attic and nowhere else.
Typically these devices are used in summer when the temperatures are high exceeding 49 degrees celsius.