Fbc Attic Ventilaiton

Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents.

Fbc attic ventilaiton.

Opening fbcm 306 4 1 nec 210 70 fbcrm1305 1 3 1 j. Intake vents located at the lowest part of the roof under the eaves allow cool. Proper attic ventilation can help reduce the load on your air conditioner. Openings for ventilation having a least dimension of not less than 1 16 inch 1 6 mm and not more than 1 4 inch 6 4 mm shall be permitted.

Fbc section 1203 2 continued ventilation attic spaces. To calculate the amount of ventilation you need for your home visit gaf s ventilation calculator now. This air passes through the attic space where it displaces warm moisture laden air which in turn exits the attic via vents at or near the top of the space being vented. Exception 1 allows you to only ventilate 1 300 th of the attic area if 50 to 80 of the ventilation occurs at least 3 above eave or cornice vents.

A 120 volt receptacle outlet must be installed in the attic and within 25 of the equipment needing service fbcm 306 3 1 nec 210 63 k. The residential code combines all requirements for building mechanical fuel gas plumbing and electrical into one document. Uninhabited spaces such as crawl spaces and attics shall be provided with natural ventilation openings as required by the florida building code building or shall be provided with a mechanical exhaust and supply air system. Requiring service with the lighting outlet switch at the attic access.

A minimum 5 vent termination height above a gas fired air handler must be maintained. Exterior openings into the attic space of any building intended for human occupancy shall be protected to prevent the entry of birds squirrels rodents snakes and other similar creatures. Fbc section 1203 2 newer studies newer ashrae studies have found that the practice of attic ventilation to be detrimental to structures in warm humid climates. Ibc 1203 2 requires 1 150 th of the attic area to be ventilated but there is an exception that is commonly used instead.

In a balanced ventilation configuration ambient outside air enters into the attic space via soffit or eave vents. Calculate or enter the square footage of the attic or area to be vented. Let owens corning roofing help you calculate exactly how much ventilation you will need for a healthy and balanced attic with our 4 step ventilation calculator.