The fan power calculated by the formula presented in APPENDIX G3.1.2.9 of ASHREA90.1-2007 is the sum of all the fan power including supply fan,returen fan,exaust/relief fan.

Hello, My production line space in our project have an supply fan, exhaust fan and make-up fan to supply OA in conditioned space.

Is there a standard way the USGBC wants the R-value of a wall assembly to be calculated taking into account the framing factor or thermal bridging that occurs with metal studs?

According to ASHRAE 90.1 (2007) Table G3.1 - 10 c, "where no heating systems exist, HVAC system shall be assumed to be electric".

We are struggling with some definitions from Table 9.4.5 of 90.1-2007.

FYI This starts April 8th. http://www.usgbc.org/articles/usgbc-membership-approves-leed-2009-energy-update?kui=XTT9pgXOvaXJ97JrPRiCnQ

Hi, I am working on a building which includes DOAS units with energy recovery cores on the proposed systems. The baseline systems do not require energy recovery per ASHRAE 90.1-2007.

HI We have a workshop building targeting for LEED NC.

Dear all, I had a reviewer comment for my basecase walls and floors assemblies that were modeled with U-value higher than the appendix G values by a mistake, however, after correcting

The EAp2 worksheet requires Title 24 sheets PERF-1, ECON-1, and UTIL-1 when the energy modeling program is EnergyPro.