HI,

We are working on a small soho office tower, about 28 floors tall with a GFA of around 20000m2. We want to use split type or VRV AC unit for the offices instead of doing a full blown chilled water system.

Reading off the LEED and ASHRAE manual, anything non-residential with more than 5 floors will need to use a chilled water system with VAV FCUs as the basecase for simulation, this will make our building impossible to achieve a 10% reduction in energy use.

Has anyone manage to do a LEED office tower with VRV or split unit AC and not use a chilled water system?

Cheers

Julian