The latest edition of International Standard ISO 5151, Non-Ducted Air Conditioners and Heat Pumps—Testing and Rating for Performance, was published in mid-June, replacing the 1994 edition. ISO 5151:2010 specifies the standard conditions for capacity and efficiency ratings of non-ducted air-cooled air conditioners and non-ducted air-to-air heat pumps. It is applicable to ducted units rated at less than 8 kw and intended to operate at an external static pressure of less than 25 Pascal. It also specifies test methods for determining capacity and efficiency ratings.

Two other standards, ISO 13253, Ducted Air Conditioners and Air-to-Air Heat Pumps—Testing and Rating for Performance, and ISO 15042, Multiple Split-System Air Conditioners and Air-to-Air Heat Pumps—Testing and Rating for Performance, are being prepared as final draft International standards and are expected to be issued for ballot in the coming weeks.

For more details, contact AHRI Director of Product Section Services Dave Delaquila at ddelaquila@ahrinet.org.