Hi, we are working in a Gas station with three different type of spaces. 1) Individual offices with one or two employees, naturally ventilated.

Please guide on how to determine Ds - Percent design primary air flow for worst case condition?

Tristan-Have you ever seen a formal comparison done between Homes and New Construction (2009)?

I can't help but notice that the new credit is double the amount of documentation for the same number of points-- and arguably, the same amount of environmental benefit-- as LEED 2009.

The baseline U-values proposed by ASHRAE 90.1-2007 for a building with high thermal mass in climate zone 1 (see below extracted from table 5.5-1) seem to be too low-performing. Are these correct?

I think group certification would be a good option for my two identical (mirrored) buildings on the same property with the same owner.

Our project's parking goes beyond the LEED boundary, since it is a mixed used building with several towers and only one of them will apply for LEED certification.

For only 2" above the 42" sight line requirement do you think a special circumstance is viable for LEED to possibly award the credit or is it better to do the calculations for the standing occupant

If the proposed HVAC design has DOAS that delivers OA to all AHU's, should there be the same auto-sized capacity but the same air flow DOAS for the baseline?