Eight proposed addenda to ANSI/ASHRAE/IESNA Standard 90.1-2004, "Energy Standard for Buildings Except Low-Rise Residential Buildings," are open for public comment until May 1.
Included is addendum ac, which would expand application coverage to address complex mechanical systems.
"The standard would more effectively address static pressure associated with complex HVAC systems requiring specialized equipment in return air or exhaust air systems, such as those in hospitals," said Larry Kouma, who heads the group that oversaw the proposed addendum. "Appropriate allowances for discharge and return air flow treatment equipment would be allowed, enabling a clear avenue for these systems to demonstrate compliance using the prescriptive compliance methods of the standard. Or, if required, users can still use the standard's energy cost budget method."
The addendum is also designed to improve compliance consistency and strengthen stringency for simple systems with an easy-to-use format and structure.
Other proposed addenda open for comment until May 1 are:
To obtain drafts of or comment on these proposed addenda, visit www.ashrae.org/standards.
Publication date: 04/17/2006