Heat pumps; heat pump units with electrically driven compressors for heating or for heating and cooling; terms, definitions and designations; german version EN 255-1:1988— 4 стр.
Heat pumps; heat pump units equipment with electrically driven compressors, methods of measurement for installed water/water, air/water and brine/water heat pumps— 14 стр.
Heat pumps; heat pump units with electrically driven compressors for heating or for heating and cooling; terms, definitions and designations; german version EN 255-1:1988— 4 стр.