How Many Square Feet Per Roof Turbine

Say the contractor is standing in front of a house that has an attic with 2 200 square feet.

How many square feet per roof turbine. 50 intake 1 7 sq. And this guideline you ll need a minimum of. 1 000 divided by 300 3 33 total square feet. 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.

1 100 square inches of intake net free area needed. Take this number and divide it by three hundred. This will give you square inches instead of square feet. Furthermore this will ensure that a continuous supply of air moves through the desired space.

Now take the square footage number and multiply it by 144. Based on your 1100 sq. 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. 50 exhaust 1 7 sq.

Near ridge of the roof. 1 000 divided by 150 6 66 total square feet 50 intake 3 3 sq. Of vented area for every 300 sq. Thousands of cfm per hour.

50 exhaust 3 3 sq. 2 200 2 1 100 square inches of exhaust net free area needed. Ft of vent space half dedicated for air intake in the soffits and the other half for exhaust on the roof. They should be divided equally between inlet and outlet vents and they can be used in any combination that will work with your roof s design.

The quotient is the amount of ventilation you will need for your attic. 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. A largely arbitrary rule of thumb that s been adopted into most building codes calls for 1 sq. Thus if your attic is 450 square feet you need roof vents equaling 3 square feet.

Attic must have 5 sq. The next step is to select a suitable exhaust vent and intake vent that fits the roof design for best performance and best aesthetics. Then divide that calculation by 144 to convert the square inches to square feet. For example a 6 by 12 inch soffit vent has 72 square inches which when divided by 144 results in a 0 5 square.

Having the correct number of turbine vents will provide an effective and balanced system. How many turbine vents you will need depends on a number of factors including the size and type of building.