Per Table 2.4 Building Performance Factors (BPF) for Complaicne with Standard 90.1-2016, if you have a mixed use building I assume that you would use the weighted averge (based on GSF) of each majo

Under ASHRAE 90.1 – G2.5, can we avoid to use a workaround to detail a HVAC system feature which could involve an energy saving, therefore avoid to do an exceptional calculation method, if we prefe

Dear All,

We got a comment back from USGBC that said this: 

I have courthouse project that involves two existing buildings being connected with a newly constructed third building.  Since one of the existing buildings connected to the third one is class

Our project is registered under the LEED v4, but we have substituted the EAc5 and EAc7 with the EA credit Renewable Energy from LEED v4.1, we intend to use the Tier 2 and purchase Green-e Energy ce

Since this is listed as an alternative compliance path for LEED v4 ID&C Thermal Comfort; if we meet the requirements for both IEQ credit Thermal Comfort and the requirements for the pilot credi

Hi Bill, Do you know how to account for exterior lighting that does not have published BUG ratings?

We are working on a small commercial office space whose staff have flexible work arrangements.