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Climate Zones - DOE Building America Program This map layer depicts the climate zone designations used by the U S Department of Energy Building America Program by county boundaries (generalized)
Alignment in US Energy Conservation Codes ASHRAE 90. 1 and IECC - Glass In the 2016 version, ASHRAE 90 1 introduced a new climate zone map with shifting boundaries Likewise, the IECC updated the map in its 2021 version to align with the ASHRAE 90 1 standard Areas that changed are circled in Figure 1, below
Building Science-Based Climate Maps - Energy. gov The new climate zones were set along county boundaries, making it easier for builders to determine what climate zone applied to a specific building The 2004 IECC Supplement was the first model energy code to adopt this new climate zone map It first appeared in ASHRAE 90 1 in the 2004 edition
ASHRAE 90. 1 MB304 - Insulation Institute ASHRAE’s ultimate objective is to provide compliance criteria for the construction of net zero energy buildings by 2030 The Standard also provides criteria for determining compliance with these requirements
ArcGIS It first appeared in ASHRAE 90 1 in the 2004 edition The IECC map divided the United States into eight temperature-oriented climate zones These zones are further divided into three moisture regimes designated A, B, and C Thus the IECC map allows for up to 24 potential climate designations
90 Zone (R-90) Standard Method Development Standards. Section 4 4 8 Residential - 90 Zone (R-90) Standard Method Development Standards For Guidance Only Zone R-90 Residential, one-family, detached Area Requirement Minimum lot size 9,000 sq ft Maximum Coverage 30% including accessory buildings **See Page 2 for infill development lot coverage
Non-Residential Minimum R-Value Insulation Requirements Map sourced from Building America Solution Center, climate zones per the 2021 International Energy Conservation Code (IECC) See appropriate IECC codes and ASHRAE standards for county specific information