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?

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?

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?

Has anyone experienced reviewers comments on Leveling Compounds or is the application more geared towards flooring systems?

The grade at our project drops considerably, allowing for conditioned space below a green roof and paved areas.

Hello all, my question is: when do i have to consider the exhaust air energy recovery in the baseline building’s AHU? The 90.1 User’s manual reports that exhaust air Energy recovery is required for

We are being challenged by the modification to IEQc8.1 Option 1 Simulation from May 9th, 2011, which replaced the entire section.