The American Society of Heating, Refrigerating, and Air-Conditioning Engineers is seeking comments for a first-publication public review of an addendum to ANSI/ASHRAE/IES Standard 90.1-2022, Energy Standard for Sites and Buildings Except Low-Rise Residential Buildings.
The addendum introduces rating requirements for two types of equipment, including direct expansion fin-and-tube coils (AHRI 410-2023) and exhaust energy recovery heat exchangers (AHRI 1060). These new rating requirements are not mandated for systems already rated under standard CSA C439-2018, or those that meet other recognized international standards. The 30-day public review period for this addendum runs through August 27.
Energy recovery systems like heat exchanges facilitate the recovery and reuse of heat wasted from exhaust air to preheat fresh incoming air. The new rating mandate is intended to boost energy efficiency by providing benchmarking guidelines, to assess the performance and efficacy of coils and exhaust energy recovery heat exchangers, in order to reduce heating and cooling loads on HVAC systems.
In a separate move, ASHRAE is calling for comments for a public review of an addendum to ANSI/ASHRAE/ICC/USGBC/IES Standard 189.1-2020, Standard for the Design of High-Performance Green Buildings Except Low-Rise Residential Buildings. This proposal discusses two issues that emerged from comments on Addendum Ag to ASHRAE Standard 189.1-2020.
ASHRAE stated that the current allowances for additional lighting power for decorative purposes are too broadly applied, as many spaces do not require such extra lighting when covered by base power allowances The association pointed to the possibility of more savings, if lighting were segmented on the basis of lamp type and luminaire type, with efficacies set for those segments in the residential lamp and luminaire market. The public review period for comments on the addendum to Standard 189.1-2020 is open through Sept. 11.
During the 30-day window ending August 27, ASHRAE is also seeking comments for the first-publication public review of addenda to ANSI/ASHRAE/IES Standard 90.2-2018, High Performance Energy Design of Residential Buildings, which includes establishing terminology for common spaces in accordance with recent scope changes that enable addressing high-rise residential buildings and modifications to Section 10, Normative References, as necessitated by the revision of multiple reference standards since the latest publication of 90.2.
Additionally, comments are open during this period for a second-publication public review of an addendum to ANSI/ASHRAE/IES Standard, High Performance Energy Design of Residential Buildings. This addendum proposes changes to the maximum allowable air leakage in the building thermal envelope and adjusts the required value from 3.6 ACH50 to 3.0 ACH50