AS/NZS 60335.2.40:2025 deals with the safety of electric heat pumps, sanitary hot water heat pumps and air-conditioners, incorporating motor-compressors as well as hydronic fan coils units, dehumidifiers (with or without motor-compressors), thermoelectric heat pumps and partial units, their maximum rated voltage being not more than 300 V for single phase appliances and 600 V for other appliances including direct current (DC) supplied appliances and battery-operated appliances. This Standard supersedes AS/NZS 60335.2.40:2023 on 27 November 2028.