ASHRAE and the Illuminating Engineering Society (IES) are now accepting public input on revisions to ANSI/ASHRAE/IESNA Standard 100-2006, Energy Conservation in Existing Buildings.

Public input on the proposed changes is being sought until June 18. Last year, ASHRAE and IES announced that they were revising the standard to provide a more comprehensive approach to retrofits of these structures for increased energy efficiency. Currently, the standard provides requirements for the retrofitting of existing buildings and addresses major and minor modifications for both residential and commercial buildings, and single- and multiple-activity buildings with variable occupancy periods. It also currently identifies an approach for 53 building types in 16 climate zones and sub-zones.
 
The proposed changes include criteria for energy-use surveys and auditing, and requirements related to implementation and verification. Appendices are included for life-cycle cost-analysis procedures as well as identification of potential energy-conservation measures. The revised standard also identifies energy-efficiency requirements for buildings with and without energy targets and provides multiple levels of compliance.

For more information on how to comment, visit ASHRAE.