Hi,

Option 1 energy simulation - I am in review of the LEED Interpretation ID# 10419 and I am unclear how I model the existing envelope of a ID+C tenant space.

My review of the ASHRAE rule set seems to indicate that modeling the existing envelope, with no planned changes, is the correct way to create a model under 90.1-2010 but the LEED Interpretation ID# 10419 has the following comment which appears to be in conflict:

The energy model must be modeled using the Title-24 new construction requirements for HVAC, DHW, lighting and envelope.

Is this interpretation just indicating the energy modeler must use the 2013 energy code ruleset for new buildings which would be the case for lighting and mechanical and envelope if it were new?

I am unclear on how to proceed.

thanks!

Kevin