Proper ventilation necessitates that fresh air is able to find its way in the attic space while allowing stale air to get out.
Attic cornice vents.
2 let the hot air to get out during the hot season.
Roof and attic protection.
The breather vent allows for this moisture to escape while eliminating any moisture from entering.
2 breather vent one of the many problems with attic spaces is that they can hold a great deal of condensation.
In fact cornice vents help you in two ways.
Of net free area for every 150 sq.
This condensation is due to the heat loss from your home.
Power gable vent shutter is designed to be used with master flow egv pg series electric gable fans.
This means for every 150 square feet of attic floor space there should be 1 square foot of net free area.
This will reduce your house cooling bill.
R806 4 installation and weather protection ventilators shall be installed in accordance with manufacturer s instructions.
Where eave or cornice vents are installed insulation shall not block the free flow of air.
Of attic floor space.
1 eliminate condensation in the attic.
Not less than a 1 inch 25 mm space shall be provided between the insulation and the roof sheathing and at the location of the vent.
This is accomplished through the placement of ventilation near the bottom of the attic space at the soffits or eaves intake and at the top peak s or ridge s of your attic space exhaust.
Regardless of season cornice vents provide your attic ventilation.
The code minimum for attic ventilation in the 2012 irc section r806 roof ventilation 1 is as follows.
Constructed of white aluminum that can be painted.