Most building codes require a ratio of 1 150 ventilation space to attic floor space.
Correct attic ventilation.
Attic fans are intended to cool hot attics by drawing in cooler outside air from attic vents.
About attic ventilation natural attic ventilation.
Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents.
Intake vents located at the lowest part of the roof under the eaves allow cool air to enter the attic.
Attic ventilation serves two main functions.
Ventilation of attic spaces is required by most building codes as well as by roofing material manufacturers and the national roofing contractors association nrca.
Lowering the temperature in the attic can help reduce air conditioning energy costs and roof deck temperature optimize the service life of a roof covering and minimize ice damming.
Hot air exhaust vents located at the peak of the roof allow hot air to escape.
At first it may seem odd to add insulation for warmth and then purposely allow cold air to.