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.
Attic venting for 1500sqft.
Of venting ideally about half placed high on the roof and half in the soffits.
Here s a closer look at attic ventilation options and recommendations for homeowners.
Attic will need 10 sq.
The house measures 30 feet by 50 feet.
Let s use the following simple ranch house for an example.
This in turn can help save money on your heating and cooling costs.
Calculate or enter the square footage of the attic or area to be vented.
Of venting technically net free vent area or nfva for each 150 sq.
For pricing and availability.
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.
Soffit vents allow outside air to.
The federal housing administration fha recommends one square foot of attic ventilation which includes both intake and exhaust for every 300 square feet of attic.
Venting a homes attic is a very important best building practices will say 50 at the ridge and 50 at the soffits unobstructed.
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.
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.
Proper air circulation through the attic space helps lower cooling bills and prolongs the life of roofing materials.
Do not use mechanical means electric attic fans.
It can efficiently remove a larger volume of hot and or humid air from your attic when compared to static ventilation.
As a certified licensed home inspector it is not correct to say too much ventilation is bad for an attic unless rain moisture is getting in.
Broan attic ventilation 14 in dia electric gable vent fan.
The master flow erv6 power roof vent is the master flow erv6 power roof vent is a great overall investment in attic ventilation.
There are several different types of attic vents to choose from.
Iliving iliving automatic gable mount attic ventilator fan with adjustable thermostat 3 10 amp.
How to determine the number of attic vents.
So a house with a 1 500 sq ft.
In some circumstances you can have less but we recommend the 1 150 ratio.