scope:

This Standard covers the installation requirements for unitary air-to-air heat pumps with cooling mode ratings up to 19 kW (65 000 Btu/h), normally used with electricity, oil, or gas as the supplementary heating source.

This Standard covers unitary air-to-air heat pumps for new installations and heat pumps installed as part of an existing heating system. 

This Standard includes system design, equipment selection, minimum installation requirements, and information to be provided to the purchaser.

When reference is made to other publications, such reference shall be considered to refer to the latest edition and any revisions thereto approved by the organization issuing that publication.