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.

Dear LEED Users, Does anybody know if the minimum HVAC equipment efficiencies listed in Tables 6.8.1 of Standard 90.1 apply to the generator (i.e chiller, boiler, heat pump) or to the whole HVAC

the building size is mandating to model the baseline with a water cooled chiller and I will compare the baseline with the design which is using HVAC that is (air cooled chiller + ice storage + dive

We are having trouble verifying the efficiency compliance of mini-split air conditioners available in Brazil. They are rated in COP where ASHRAE requirements are stated in SCOP.

I'm trying to understand baseline exterior lighting versus the proposed. My calculations show that my proposed is less than my baseline, is this okay?

Dear All:- Our project have ventilation spaces only (No A/c spaces) so how we model these building in energy model As per LEED Missing manual we follow below things "Assign HVAC systems as per Ap