This standard specifies conditions for the low-noise design of water-carrying components of electric water heaters with a rated capacity up to 1000 litres.; It applies to both open and close thermal storage water heaters thermally controlled instantaneous heaters, non-thermal storage water heaters and vented open-outlet boilers.#,,#
DIN 44899-6:1986 history
1986DIN 44899-6:1986 Electrical water heaters; rated capacity up to 1000 litres; requirements for low-noice level design