Attic Ventilation Calculator Ridge Vent

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.

Attic ventilation calculator ridge vent.

Our roof is 50 feet long so using a standard product we will get 900 square inches of ventilating space. So the ridge ventilation has exceeded the minimum requirement. All lomanco attic ventilation product requirements are based on the minimum standard 1 300 rule as set forth by the international building code ibc and the international residential code irc. Calculate the total vent area needed.

Ft divided by 150 equals 10 sq. Gaf ventilation calculator proper attic ventilation can help reduce the load on your air conditioner. Attic vent calculator for years we have been working with architects and specifiers to ensure affordable roof ventilation that upholds building code standards. To use this calculator first find the total square footage of the attic floor area.

Then look across to the number under the minimum length of ridge column. Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents. Standard ridge vent produces 18 square inches of ventilating area per lineal foot. Ventilation calculator let owens corning roofing help you calculate exactly how much ventilation you will need for a healthy and balanced attic with our 4 step ventilation calculator.

Our passive roof vents are ul certified and rated to withstand wind pressure in excess of 200 mph. 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. A 50 x 30 attic would have a total area of 1 500 sq. The first step is to check out this 60 second video and learn about the 300 1 rule the difference between intake and exhaust ventilation and why proper ventilation is so important to get right to help calculate your attic ventilation needs visit gaf ventilation calculator.

That tells you the total linear feet of ridge vent required using the 1 300 minimum code requirements. Nine hundred square inches equals 6 25 square feet. Intake vents located at the lowest part of the roof under the eaves allow cool. Vent calculator design your balanced ventilation system.

Of total vent space needed. How do you pick the right attic vent. 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.