International. ASHRAE announced the release of an updated edition of ANSI/ASHRAE/IES Standard 90.2-2018 Energy Efficiency Design of Low-Rise Residential Buildings. The standard sets minimum building-wide energy performance requirements (design, construction and verification) for the energy performance of residential buildings.
The 2018 revision of Standard 90.2 outlines energy performance measures of cost-effective residential buildings that are at least 50 percent more efficient than those defined by the 2006 International Energy Building Code (IECC).
"Standard 90.2 provides a mechanism by which any residential building design can be easily evaluated based on performance targets," said Theresa Weston, chair of the Standard 90.2 committee. "This update to the standard offers better alignment between the requirements of this standard and the availability of products on the market, as well as some revisions to improve the clarity and internal consistency of the document."
The 2018 edition of Standard 90.2 provides:
- Clarification of modeling software requirements;
- Guidance on the use of international climate data presented in ASHRAE Standard 169;
- A new regulatory appendix on installation techniques suitable for critical thermal resistance construction components;
- Improving Prescriptive Envelope Performance Data Tables
- New performance specifications for ground-based heat pumps;
- Minimum lighting efficiency provisions for single-family, large, single-family and multi-family homes;
- Guidance on pool heater pilot lights, pump motor efficiency and outdoor de-icing systems; and
- Clarifications to air leak testing procedures in multi-zone buildings.
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