Given a building with all conditioned spaces, what is recommended or required to determine the conditioned area square footage?  Do you take measurements from the exterior face of the exterior

Our cooling system does not use any water. Instead we are planning to use a R410-a refrigerant. Would this classify for full compliance with Option 2 or Option 3.

In Europe which parameters shall be considered to establish whether the site is non-attainment area for PM2.5?

Hello - We're looking into the Innovation credit for low/no mercury lamps for our CI renovation.  The innovation credit has the below notice:

What are the challenges in determining the environmental qualities and human health impacts of building materials or products in LEED v4 projects?

Hello

We are currently working in a location where there aren't any gypsum recycling plant within a 200 mi radius. We have been looking 

In USGBC's "Who can be a Cxa" document (https://www.usgbc.org/resources/who-can-be-cxa), an independent company, not a member

Hello,
We have an issue about how to perform an EPD project for a client.
Our client would like an EPD for their Insulated Metal Panels used for cold room system.

The credit requires to submeter at least 2 of the following subsystems: irrigation, indoor plumbing fixtures and fittings, domestic hot water, boiler, reclaimed water, and other process water.

Hi All,

Our project composed of several buildings which share a group of main central plants (including several chillers and cooling towers).

Does below approach correct?