CSA C273.5-11

Abstract

This Standard covers the installation requirements for unitary air conditioners and air source heat pumps for residential applications with cooling ratings up to 19 kW (65 000 Btu/h). <br>This Standard covers installations in new construction and, where applicable, in installations that are part of an existing system. <br>This Standard covers equipment requirements, system design, equipment selection, minimum installation requirements, and information to be provided to the owner. <br>In CSA standards, "shall" is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; "should" is used to express a recommendation or that which is advised but not required; and "may" is used to express an option or that which is permissible within the limits of the standard. <br>Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material. <br>Notes to tables and figures are considered part of the table or figure and may be written as requirements. <br>Annexes are designated normative (mandatory) or informative (nonmandatory) to define their application. <br>The values given in SI (metric) units are the standard. The values given in parentheses are for information only.