Attic Ventilation Ach
Ventilation of attic spaces is required by most building codes as well as by roofing material manufacturers and the national roofing contractors association nrca.
Attic ventilation ach. Of persons in the. Fresh air or make up air requirements recommended air change rates ach for typical rooms and buildings auditoriums kitchens churches and more sponsored links the volume of fresh air make up air required for a proper ventilation of a space is determined of the size and the use of the space typical the no. You can also contact your local municipality to check on building code in your area. Most building codes require a ratio of 1 150 ventilation space to attic floor space.
Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents. In mixed climates ventilation serves either role depending on the season. Intake vents located at the lowest part of the roof under the eaves allow cool.