Rating System

LEED BD+C: New Construction, LEED BD+C: Schools, LEED ID+C: Commercial Interiors, LEED BD+C: Core and Shell, LEED O+M: Existing Buildings

Rating System Version

v2 - LEED 2.2, v2 - Schools 2007, v2 - LEED 2.0, v2 - LEED 2.0, v3 - LEED 2008

Inquiry

Our project team would like to clarify if the design of our building meets the natural ventilation requirement of ASHRAE Standard 62.1-2004. The project is a large factory building with the majority of the space not mechanically ventilated. The naturally ventilated space is 64,700 sq meters of floor space. The highest point in this space is the peak of the roof and it is at least 9.7 meters from floor to the bottom of the beams. There is a row of single story offices which are mechanically ventilated in the middle of this space but the area above and around the offices does not block or divide the ventilated space with any full height walls. The walls around the perimeter of the naturally ventilated space have operable louvers and the roof has large area of central roof ridge vents. The total opening area of the louvers and the roof vents is 5,673 sq meters, which is 8.8% of the net occupiable floor area. The ventilated space is a contiguous space and all of the openings are on the roof and walls, but some indoor space is not within 25 feet of any opening. The natural ventilation design of wall louvers and roof vent has got the approval from "Local Zoning Authorities" and "Occupational Safety and Hygiene Management Department" Does this constitute naturally ventilated space which complies with the requirement of ASHRAE 62.1?