This is the harmonized CSA and UL standard for Heating and Cooling Equipment. It is the fourth edition of CSA-C22.2 No. 236 and the fourth edition of UL 1995. This edition of CSAC22.2 No. 236 and UL 1995 supersedes the previous editions published in 1995, 1990 and 2005.
These requirements apply to the following stationary equipment for use in nonhazardous locations rated 7200 V or less, single- or 3-phase, and remote control assemblies for such equipment: a) Heat pumps, for heating and cooling with or without factory, or field-installed electric resistance heaters, or hot water or steam heating coils. b) Air conditioners for cooling with or without factory, or field-installed electric resistance heaters, or hot water or steam heating coils. c) Cooling portion and associated components of combination heating and cooling equipment employing gas-, oil-, or gas-oil-fired heating means. However, the requirements for the construction and performance of the gas-, oil-, or gas-oil-fired heating means, and their associated components, are to conform to the particular standards covering such heating equipment and components. d) Liquid chillers and compressor-evaporator or liquid chiller assemblies intended for use with remote condensers. e) Condensing units intended for connection to a remote nonspecified evaporator and compressor units intended for connection to a remote nonspecified evaporator and condenser. f) Add-on heat pumps for comfort heating or heating and cooling. g) Heat pump water heaters and refrigerant desuperheaters, and packaged heat pump water heaters consisting of a heat pump water heater and an associated storage tank. h) Fan units and fan coil units for comfort heating and/or comfort cooling. i) Room fan heater units, central heating furnaces, and similar fixed electric space heating for comfort heating.