This standard includes requirements and testing for mechanically actuated combustion air flaps. These flaps are destined to be installed in the combustion air outlets. They shut off the combustion air outlets during the standstill time of the heating. By this the cooling down of the room the heating is installed, is prevented.#,,#
DIN 32732:1989 history
1989DIN 32732:1989 Mechanically actuated combustion air flaps; safety requirements, testing and marking