1.1 The following covers the requirements for refrigerant heat recovery units which are intended for installation in conjunction with air conditioning or refrigerating systems to extract heat from the refrigerant for heating potable water. Generally these units include a heat exchanger and water temperature control components. They may include additional components such as hot water storage tanks and water circulating pumps.
1.2 The efficiency of the units, the feasibility of interconnection with air conditioning or refrigerating systems, and the effect of the units on the operation of the air conditioning and refrigerating systems are not part of the investigation for coverage of these units under Classification Service.