Hi,

Hi there, I have a question regarding VRF efficiencies. We have an office building that have VRF with heat pump systems that provide cooling and heating.

Hello,

If a proposed chiller (or boiler) meets the Tables 6.8.1A-J in 2007 or 2010, when tested with water at AHRI conditions but is designed to be used with glycol for freeze protection, then its actual

The prescriptive path under Option 3 still references the "Advanced Buildings Core Performance Guide".  However, this guide has been "sunset" by NBI and no longer exists.  Typic

Hi all, does anyone have any reference to USGBC guidance or experience in modeling CHP when it is electricity lead not thermal lead? 

i need to know what is required to be filled exactly in roof construction and whatis meant by building ID ??

We have a project space where the built up area is 2 lakh sqft out of which the conditioned space is 1000 sqft. Is energy modeling necessary in this scenario?

As we are outside of the USA, ASHRAE 90.1:2010 is a new requirement that came with v4 and our designers have no experience in interpreting and applying the mandatory requirements.

Has USGBC issued any equivalency for Title 24 (vs ASHRAE 90.1) in LEEDv4 EA credits yet? I've seen comments saying it can take a while. Just wondering if it is on the horizon for LEEDv4 or not?