The requirements according to this standard shall secure, that if substances endangering drinking water are used as heat exchanger medium the drinking water cannot be contaminated.#,,#
DIN 4753-11:1990 history
2011DIN 4753-1:2011 Water heaters, water heating installations and storage water heaters for drinking water - Part 1: Tanks with a capacity of over 1000 l
1990DIN 4753-11:1990 Water heaters and hot water systems for drinking and service water; indirect heat exchangers; requirements, testing and marking