House Attic Ventilation Requirements

Attic ventilation fans whether hard wired or powered by their own solar panels seem like a low cost and effective way to help keep your house cool.

House attic ventilation requirements.

These fans may be controlled by a switch or a thermostat which detects heat build up in the attic space and automatically exhausts the attic space. The following are the requirements taken directly from the irc. I had new power vents installed they are more powerful move more air than previous ones. You can calculate attic ventilation requirements by determining the square footage of your attic.

Feet of attic space divided 50 50. The key to proper ventilation of your roof and attic is balance. 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. However the utility of attic ventilation fans is actually quite a controversial topic.

Good insulation reduces fan effectiveness. The ridge vent is installed on the peak with nails and shingled over for aesthetic purposes. Told that the 2 attic power vents are the only attic ventilation i have the house does have vented soffits every other soffit cover is vented. Other options to meet your attic ventilation needs are.

The amount of space you devote to intake must be equal to the amount you allow for exhaust and these must be calculated according to the size of your attic and slope of your roof. Attic ventilation requirements how many attic vents your roof needs industry standard for proper attic ventilation recommends for no vapor retarder type of attic insulation no paper plastic or aluminum layer between the attic floor and insulation layer 1 sq. Ridge vents are one of the easiest ways to meet roof venting requirements. Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents.

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. The ventilation amount and opening size requirements can be found in section 806 roof ventilation of chapter 8 roof ceiling construction. Intake vents located at the lowest part of the roof. Standard attic vents like af 50 s ventilation fans or solar powered attic fans.

Right after noticed house was considerably cooler and i contributed this to new fans. The majority of the requirements related to attic ventilation have not changed much from the previous editions. How attic ventilation works. The downside of attic ventilation fans.

Foot of ventilation for every 150 sq.