Hi Nick,
We?ve used 10% as a standard proportion for meeting/conference spaces in a C&S office for LEED previously with no issues. We?ve had comments specifically targeting this as a requirement for 62.1 calculations in C&S buildings when you have a multi-zone VAV system ? or any other system where the fresh air is a variable proportion of the conditioned air. We produced a notional floor plan suggesting how it could be zoned, although the level of detail used was minimal. This seems sensible given that the building upon fit-out will have a variety of space types, which will usually follow a relatively predictable layout and the design should be capable of coping with this.
Hope that helps,
Edwin Wealend
Principal Engineer
Cundall Engineering Design Consulting (Shanghai) co., Ltd
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T +86 021 5836 6138
F +86 021 5836 6137
www.cundall.com.cn
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