How Many Square Feet Per Roof Turbine

Thus 6 66 divided by 2 3 33 square feet of attic ventilation for intake and 3 33 square feet of attic ventilation for exhaust.

How many square feet per roof turbine. This will give you square inches instead of square feet. Build your roof empowers you to select each layer and component that goes into your total protection roofing system so that you get the roof you want to protect your home. 2 200 2 1 100 square inches of exhaust net free area needed. A small 12 inch diameter turbine vent with a constant wind speed of 5 miles per hour mph can remove 347 cubic feet of air per minute cfm from the attic space.

The next step is to select a suitable exhaust vent and intake vent that fits the roof design for best performance and best aesthetics. Take this number and divide it by three hundred. We want to share those questions and answers with you. What are the building code requirements for ventilating a roof.

Thousands of cfm per hour. For example a 6 by 12 inch soffit vent has 72 square inches which when divided by 144 results in a 0 5 square. 1 square foot of ventilation for every 300 square feet of space for pitched roofs with vapor barriers. Although more vent is generally better replacing a turbine vent with a standard flat vent is acceptable as long the vent is big enough for the square footage of the attic space.

Say the contractor is standing in front of a house that has an attic with 2 200 square feet. The quotient is the amount of ventilation you will need for your attic. Because vents are rated in square inches you need to convert the square feet required to square inches. Now take the square footage number and multiply it by 144.

This is accomplished by taking the square feet recommended and multiplying by 144. First find out the square footage of your attic and sketch it onto the graph paper. 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. Flat roof vents have no moving parts to break or squeak but don t vent as much air as wind driven vents.

Thus if your attic is 450 square feet you need roof vents equaling 3 square feet. There are also gable and roof fans which actively pull the hot air out of the attic. 30 lineal feet required. Which roof vents are best based on roof type climate and budget for example.

1 100 square inches of intake net free area needed. Depending upon the diameter of the vents and the wind speed outdoors the turbines can expel vast quantities of humid air before it becomes a problem.