Find Attic Area

Multiply the length of the attic times the width in feet to find the attic area then divide by 150 to find the total square feet of vent space needed.

Find attic area.

Determine the net free ventilating area the attic vents you plan to install. An attic sometimes referred to as a loft is a space found directly below the pitched roof of a house or other building. There is a 22 foot by 26 foot attached non heated garage. Read millions of reviews and get information about project costs.

An attic may also be called a sky parlor or a garret because attics fill the space between the ceiling of the top floor of a building and the slanted roof they are known for being awkwardly shaped spaces with exposed rafters and difficult to reach corners. Multiply step 1 and step 2 together to get the area of the attic floor. And having insulation in your attic keeps the area at a consistent temperature. For example if your length is 40 feet and your width is 20 feet then 40 20 800 square feet.

Ft divided by 150 equals 10 sq. Federal housing authority recommends a minimum of at least 1 square foot of attic ventilation evenly split between intake and exhaust for every 300 square feet of attic floor space. The house measures 30 feet by 50 feet. Ok to determine how much ventilation area you need for your house all you need to know is the square foot area of the attic to be ventilated.

A 50 x 30 attic would have a total area of 1 500 sq. Here are a few guidelines for choosing the right area and cutting an appropriate access hatch to your attic. Whether you plan on improving the ventilation in your attic or adding energy saving insulation you will need to accurately determine its actual size. Connect with the best attic fan repair contractors in your area who are experts in keeping your attic system running smoothly.

Of total vent space needed. Step 4 measure the height of your attic in feet. Square footage relates to the floor area only and does not factor in the height of the attic space. For example if your attic height is 10 feet and your attic area is 800 then 10 800 1 3.

Proper attic ventilation consists of a balance between air intake at your eaves soffits or fascias and air exhaust at or near your roof ridge. The nfva subtracts the dimensions of. Smaller spaces may be hard to access especially if you re carrying items to or from the attic. Attic ladder installation typically requires a space that is at least 25 inches by 55 inches.

Let s use the following simple ranch house for an example. Homeadvisor is the simplest way to find and book attic and whole house fan repair services near you. You want high quality insulation in your attic as it will ensure that the cool air from your air conditioner can t escape your home. Step 5 multiply step 3 by step 4 by 1 3.

Calculate the total vent area needed.