Intake Vents For Attics

The ideal amount of attic ventilation is one square foot of vent space for every 150 square feet of attic area.

Intake vents for attics.

So how much intake ventilation do i need. In this post we cover the intake ventilation. Ridge vents and gable vents serve dual purposes and operate as both intake and exahust vents. Soffit vents run the full length of a soffit the material underneath your eaves or are placed between the joists.

However if the attic has more exhaust than intake it is potentially problematic because the exhaust vents could become intake to compensate for the lack of balanced intake. Hot air exhaust vents located at the peak of the roof allow hot air to escape. In vent attic roof vent is an on the rooftop intake ventilation product that lets fresh air in when traditional soffit vents are out. This value is split evenly between intake and exhaust ventilation.

These are the most common intake vents. Of course there should be intake vents to ensure a balanced system. Intake vents located at the lowest part of the roof under the eaves allow cool air to enter the attic. One method is to use a powered attic vent with a humidistat thermostat located close to the ridge or top of the roof.

In vent is ideal for roofers and remodelers who need to add attic roof intake ventilation to balance their ridge vents but can t access the soffits or overhangs. The shutter will open when the electric gable vent is operating. Power gable vent shutter is automatic 20 in. Help protect your roof system from premature deterioration by installing a properly balanced attic ventilation system consisting of cobra exhaust vent at the ridge and adequate intake ventilation at or near the soffit areas of your roof.

Figure 7 mechanical ventilation used with a hip roof. Constructed of white aluminum that can be painted. Attic length x attic width 150 total vent space or net free area nfa. Power gable vent shutter is designed to be used with master flow egv pg series electric gable fans.

However if the attic has more exhaust than intake it potentially can cause the extra exhaust to pull its missing intake from itself if it s a ridge vent or from another nearby exhaust vent from one wind turbine to another or one roof louver to another which means possible weather ingestion. As a result the intake vents on the leeward side of the house will work with the exhaust vents to release air.