Most building codes require a ratio of 1 150 ventilation space to attic floor space.
Open vent in attic.
Ventilation of attic spaces is required by most building codes as well as by roofing material manufacturers and the national roofing contractors association nrca.
Power gable vent shutter is automatic 20 in.
Ridge vent must me installed per the manufactures instructions.
Ventilation can be accomplished using various products and techniques.
Intake vents located at the lowest part of the roof under the eaves allow cool air to enter the attic.
When installed as part of a properly balanced when installed as part of a properly balanced attic ventilation system gaf cobra exhaust vent is a shingle over exhaust vent installed at the roof ridge that helps exhaust excess heat and moisture from your attic.
Although air should circulate year round through the attic your house will probably be more comfortable if you cover the foundation vents in the winter.
It comes on an easy to install flexible mesh roll and is hand nailable with no complicated fitting wrapping nail gun adapters connectors or end plugs needed.
They are great to help increase airflow through your attic and to help vent out moisture and hot air especially if your home only has small vents on the roof.
Effective attic ventilation systems reduce damaging heat and moisture in your attic promote energy efficiency by helping to reduce the load on your air conditioner in the summer and also reduce the risk of ice dam formation on your roof.
Power gable vent shutter is designed to be used with master flow egv pg series electric gable fans.
These vents allow air inside the attic to exit through the lowest location of the soffit and provide incredible ventilation and air movement when they are used in conjunction with ridge vents that run the entire length of the roof.
This means for every 150 square feet of attic floor space there should be 1 square foot of net free area.
Before we explore how to ventilate an attic space it is prudent to understand how much ventilation is needed.
Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents.
The code minimum for attic ventilation in the 2012 irc section r806 roof ventilation 1 is as follows.
It can do both.
Of net free area for every 150 sq.
Best ventilation is open soffit venting to a open vented ridge vent.
The shutter will open when the electric gable vent is operating.
One last thought attic ventilation is not there to get rid of heat it is there to get rid of excess moisture accumulating from the home.
Constructed of white aluminum that can be painted.
Of attic floor space.
Insulation at least r 38 or more is there for heating and cooling.
