Previous Codes: The original energy code for New Hampshire was enacted in response to PL-94-163. This enabling legislation was RSA 155:D, which applied to both residential and commercial buildings and was based on ASHRAE/IES Standard 90-75 and the National Conference of States on Building Codes and Standards "Code for Energy Conservation in New Building Construction" dated December 1977. RSA 155:C, which related to energy conservation in state-owned buildings, was later repealed. The residential standards and administrative sections of RSA 155:D were revised in 1986.
The standards for commercial buildings were revised in 1993 to reflect the EPAct requirement for compliance with ASHRAE/IESNA 90.1-1989. In 1998, MEC95 standards were adopted. The Building Code Review Board and the General Court adopted the 2000 IECC in 2002.
In 2007, New Hampshire adopted the 2006 IECC Zone 6 as its residential and commercial energy codes.
2009 IECC Update: After it approved the 2009 IECC and other 2009 I-Codes in May 2009, the New Hampshire State Building Code Review Board finalized the adoption process on December 11, 2009 as it reviewed several proposed amendments, rejecting most but approving an exemption for log homes.
Effective April 1, 2010, the New Hampshire State Building Code has been amended to reference the 2009 IECC [NOTE: the 2009 IRC requirements for automatic sprinkler systems in one- and two-family dwellings and townhouses will NOT take affect until April 1, 2012 unless required by local ordinance].
On June 18, 2012, New Hampshire Gov. John Lynch signed a bill (HB 137) into law ratifying a December 2009 rule promulgated by the New Hampshire State Building Code Review Board updating the New Hampshirte State Building Code. Since April 1, 2010, this state code has included the 2009 IECC. State law requires the New Hampshire Legislature to ratify regulatory agency rules within two years.
Local 2012 IECC Adoption: On January 24, 2011, the Town Council of Durham, New Hampshire approved legislation (Ordinance #2011-02), making the town of 15,000 one of the first jurisdictions to adopt the 2012 IECC. The ordinance specifies compliance with the 2012 IECC’s requirements for Climate Zone 6.
Information last updated August 8, 2012