Sub Floor Ventilation Requirements In California

1999 timber framed buildings for uncovered ground.

Sub floor ventilation requirements in california. E2 as1 also provides additional detail on. If crossflow ventilation requirements cannot be met due to site conditions mechanical ventilation systems should be designed and implemented to meet the bca requirements. Australian standard 3660 specifies the minimum clearance requirements between the ground and the underside of a subfloor. All new residential construction.

The space between the bottom of the floor joists and the earth under any building except spaces occupied by a basement or cellar shall be provided with ventilation openings through foundation walls or exterior walls. California title 24 part 6 references ashrae standard 62 2 2007 as california s state ventilation code with one exception. Solution e2 as1 for subfloor ventilation of suspended timber floors. Where an alternative subfloor ventilation system is proposed as a open link in same page performance solution to that described in open link in same page part 3 4 1 that proposal must comply with.

Vent type l vent size l area per square mm. Australian standards and bca requirements. Terracotta 230mm x 150mm 6 200vent in situ. This standard is called termite management and it sets out a range of good building practices for avoiding termite attack and maintaining adequate subfloor ventilation.

Appropriate open link in same page performance requirements. 2007 california building code january 1 2009 supplement 1203 3 under floor ventilation. Squared nett ventilation per lineal metre on both external and internal walls. Of the australian standards a s.

What projects are required to meet ashrae standard 62 2 ventilation standards in california. In order to ventilate more effectively installing sub floor fans will enable you to extract moisture and damp stale air from the sub floor area and replace it with fresh air drawn from the outside by one or more sub floor fans. Operable windows are excluded from the options for meeting whole building ventilation requirements. Table 402 1 minimum ventilation rates in breathing zone 1 2 4 ashrae 62 1.

Ventilation air supply requirements for occupancies regulated by the california energy commission are found in the california energy code. Decking s verandahs and patios should not limit crossflow ventilation to sub floor space if ventilation is effected steps should be taken to achieve the correct bca requirements. Aleta 230mm x. 3600 specifies that the minimum requirement for sub floor ventilation should be one 1 ventilator of 8 400 mm.

Sometimes natural sub floor ventilation is sufficient however often nature will need a helping hand. This requires a minimum of 3 500 mm2 of net open area for every 1 m2 of the house plan floor area.