by James A. D'Aloisio, P.E., SECB, LEED AP BD+C
On January 1, 2015, the new NYS Commercial Energy Code became effective, replacing the commercial portions of the 2010 Energy Conservation Construction Code of New York State (ECCCNYS). The residential portion of the ECCCNYS was not changed from 2010.
The new Code is based on the IECC 2012 and ASHRAE 90.1-2010. The Building Code Council has not yet provided the new Commercial Energy Code as one document. Rather, a "2014 Supplement" is available that identifies revisions to the ECCCNYS-2010 and the referenced IECC and ASHRAE 90.1 codes. So, to follow the new Code, one must cross-reference several documents.
The 2012 IECC and ASHRAE 90.1-2010 have very different prescriptive envelope requirements, with ASHRAE 90.1-2010 having similar requirements to the 2010 ECCCNYS that we have been using for the past four years, which was based on the 2009 IECC. The 2012 IECC requires significant increases, e.g. 25-50% increases in roof insulation above deck. Accordingly, on the surface, the ASHRAE 90.1 compliance path looks to be much easier to meet.
COMcheck is usable with the new code, but the envelope compliance path apparently uses the ASHRAE 90.1 Appendix C Trade-Off Option, regardless of which code is selected.
Air leakage control is still mandatory, regardless of the compliance path followed. Both paths have minor changes. Field-fabricated assemblies still do not need testing, and there are still the three methods of ensuring "compliance" - Materials, Assemblies, or Building Test.
See http://www.dos.ny.gov/dcea/energycode_code.html for more information.