Calculating Attic Volume

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.

Calculating attic volume.

With a tape measure and some simple mathematical formulas you can easily calculate your attic s square footage. Calculate the two halves of the attic separately then add the spaces together. Click the button to calculate the depth in inches and pounds of total insulation required for this job. This calculator will help you estimate hip roof parameters including rafters and roof area person outline anton schedule 2011 08 29 17 53 20 one of users asked us to create calculator which will help him estimate hip roof parameters like rafter s lengths roof rise and roof area.

To calculate the volume or capacity of an item or space in cubic feet you will first need to measure its length width and height in either feet inches or a combo of both centimeters meters or yards. Step 1 create a rough sketch of your attic on a piece of paper. Input length width and desired r value of the area to be insulated. Once you have those measurements you apply some multiplication as follows.

For example if you have a cross gabled house with two wings split the attic into two parts where one wing joins the other. This attic ventilation calculator computes the size and number of solar powered attic fans to achieve the proper ventilation for your attic. This calculator is to be used as an estimating tool only. How to calculate cubic feet.

This will give you a visual representation of the dimensions of your attic for reference. Here s a rule of thumb to follow. Generally as the roof pitch increases the volume inside the attic also increases along with the amount of needed attic ventilation. This calculator is designed to arrive at a reasonable attic or ceiling crawl space ventilation fan air volume displacement rating for minimum normal and optimum outside heat conditions.

This vent fan removes heated air from inside that space and should be placed near the peak to effectively remove the hottest air. Let s use the following simple ranch house for an example. 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. Calculating ventilation area of attic kitchen ventilation text.

Cubic feet is a unit of volume. The house measures 30 feet by 50 feet. For more complex attic spaces draw a sketch of your space and divide the space into parts before performing the calculations.