In fact cornice vents help you in two ways.
Attic cornice vents.
Roof and attic protection.
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.
The code minimum for attic ventilation in the 2012 irc section r806 roof ventilation 1 is as follows.
2 let the hot air to get out during the hot season.
Of attic floor space.
Power gable vent shutter is designed to be used with master flow egv pg series electric gable fans.
The breather vent allows for this moisture to escape while eliminating any moisture from entering.
The shutter will open when the electric gable vent is operating.
R806 4 installation and weather protection ventilators shall be installed in accordance with manufacturer s instructions.
1 eliminate condensation in the attic.
The box of the vent covers the piping with a large cover to shield the vent from rain and snow.
This will reduce your house cooling bill.
Proper ventilation necessitates that fresh air is able to find its way in the attic space while allowing stale air to get out.
Where eave or cornice vents are installed insulation shall not block the free flow of air.
This condensation is due to the heat loss from your home.
Regardless of season cornice vents provide your attic ventilation.
Power gable vent shutter is automatic 20 in.
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 means for every 150 square feet of attic floor space there should be 1 square foot of net free area.