scope:

Establishes requirements for determining in accordance with a standardized procedure, the noise (parameter: sound power level) emitted into the surrounding air by air conditioners, heat pumps or dehumidifiers with electrically-driven compressors. The frequency range used in this pre standard is from 125 Hz to 4000 Hz. Three methods for determining the sound power levels are specified in order to avoid unduly restricting existing facilities and experience. The first method is based on reverberant room measurement (see EN 23741, EN 23742 and EN 23743-2); the second is based on measurements in an essentially free field over a reflecting plane (see EN 23744 and ISO 3745); and the third method is based on sound intensity measurement (see EN 29614-1). It is emphasized that this measurement standard only refers to airborne noise. This standard is applicable to air conditioners and/or heat pumps defined in accordance with EN 255 and EN 814, and for dehumidifiers in accordance with EN 810.