Rating System

LEED BD+C: New Construction

Rating System Version

v2 - LEED 2.0

Inquiry

The State Legislative Building was originally built in 1927 and has not seen significant modernization since that time. It is listed on The National Register of Historic Places. As such, ASHRAE Standard 90.1-1999, Exceptions to 4.1.2.2 apply. This allows that a historic building "need not comply with these requirements otherwise applicable to such building or space that is being altered." This refers to an exception to bringing Envelope, HVAC, Service Water, Power, and Lighting Systems up to the ASHRAE Standard. We propose that in light of Exception to 4.1.2.2, the existing historic envelope and historic lighting systems become the "baseline" for our building simulation model to meet ASHRAE 90.1-1999. Because of their historic nature those building systems will remain basically unimproved. The HVAC system and some lighting in the office areas will be improved, therefore, we will not seek exception for those systems. Do you (USGBC) concur with the approach of setting the baseline of the building using the ASHRAE Exceptions where applicable?