California Attic Ventilation

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California attic ventilation.

California title 24 part 6 references ashrae standard 62 2 2007 as california s state ventilation code with one exception. Authority for regulating ventilation in buildings is left up to each state and usually that authority is delegated to local jurisdictions counties and cities. To lower attic temperatures and to remove excess moisture. A code may require that a standard be met.

The insulation will resist heat transfer into the house. Table 402 1 minimum ventilation rates in breathing zone 1 2 4 ashrae 62 1. Attic ventilation serves two main functions. The uniform building code requires enclosed attic spaces enclosed rafter spaces and under floor areas to be ventilated by not less than 1 square foot for each 150 square feet of attic under floor area.

Vents attic and crawl space vents are incorporated into buildings to help remove excess moisture that can move into these spaces either from the soil in the case of a crawl space or from the living space in the case of attics and cathedral ceilings. In the summer natural air flow in a well vented attic moves super heated air out of the attic protecting roof shingles and removing moisture. Proper insulation and air sealing also keeps attics cold in winter by blocking the entry of heat and moist air from below. That is openings doors windows and louvers to the outside should create a natural flow of fresh.

Replacing your bathroom fan range hood or even installing a new fan. Attic ventilation estimating tool. Operable windows are excluded from the options for meeting whole building ventilation requirements. Proper attic ventilation can help reduce the load on your air conditioner.

Use this tool to estimate the ventilation needs for your attic and get a list of broan attic ventilation product that will meet your needs. The chart below represents the net minimum area in square inches required for proper ventilation. Get started indoor air quality iaq poor indoor air quality can have a negative effect on your home. If your attic is enclosed california s building code states it should have cross ventilation.