This newer database is different than the one used by the IECC. The data used in Standard 90.1 is published in ASHRAE Standard 169 (ASHRAE, 2013), which is based on a research project completed in 2009 (Thevenard, 2009). On the other hand, ASHRAE 90.1 presents the methodology related to climate data in Annex 1 of the standard. This work was presented to ASHRAE during the 2003 Chicago Winter Meeting. Department of Energy’s Pacific Northwest National Laboratory (Briggs, 2002). The standard states that much of the data is derived from work performed at the U.S. The IECC specifies climate zones in Section 3 - General Requirements. Is the IECC the code or is ASHRAE 90.1? A review of both standards shows nuanced differences between the compliance paths in each document however, for the most part, the obligations in both are similar. Demonstrating that the building energy cost is 85% of the standard reference design.Satisfying prescriptive requirements for Building Envelope Requirements (Section C402), Building Mechanical Systems (Section C403), Service Water Heater (Section C404), Electrical Power and Lighting Systems (Section C405), Additional Efficiency Package Options (Section C406), Total Building Performance (Section C407), and Maintenance Information and System Commissioning (Section C408) and.The compliance path for the IECC, found in Section C 401.2, requires that one of the following is met:

Everyone responsible for the design, maintenance, or ownership of a commercial building continually experiences energy code anxiety during these regular cycles of publication.Īs previously mentioned, most authorities having jurisdiction mandate compliance with the IECC. It includes significant changes affecting the built environment, including the requirement of system commissioning and limits on heated and cooled vestibules. On the other hand, the most recent version of the IECC was published last year (International Code Council, 2018). Next year, a new edition of ASHRAE 90.1 will be published, and the design community will again scramble to adapt to any changes. Within the mechanical section, changes include a mandate for monitoring of large, electric-driven chilled water plants for energy use and efficiency efficiency and rating requirements for dedicated outdoor air systems (DOAS) and performance monitoring for air economizers for air-cooled DX cooling units. This edition includes revisions to the building envelope, lighting, and mechanical directives. The most recent version of ASHRAE 90.1 was published in 2016 (ASHRAE, 2016).

Ashrae 90.1 2015