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Load Calculations
Calculations to be performed by ACCA approved Rhvac computer program per Manual J Eighth edition Version 2 and ACCA Manual D. Equipment selection following ACCA Manual S procedures. Mass. BBRS 780 CMR Table 6105.1 Climate Zone Thermal Design Criteria.

Stretch Energy Code - Information The Stretch Energy Code was added to the building code on July 24, 2009 and is located in the code as Appendix 115 AA. It uses provisions of the International Energy Conservation Code 2009 (IECC 2009) but provides a more energy efficient alternative to the standard energy provisions of the code that a municipality may adopt.  

Note: Although the standard "non-stretch" energy provisions of the code will be based on the IECC 2012 as of July 1, 2014, the stretch code will continue to be based on amendments to the IECC2009 (and ASHRAE 90.1-2007 for large commercial buildings) until such a time as the stretch code is updated.
Useful Links
RESNET | Home Energy Audits and Ratings‏:
HVAC Design Support LLC. has excelled in consistently delivering low HERS index scores.
to view HERS Certificate
 2012 IECC:
 2015 IECC
to view Load Calculations.