DIN EN 15879-1:2011-05 Testing and rating of direct exchange ground coupled heat pumps with electrically driven compressors for space heating and/or cooling - Part 1: Direct exchange-to-water heat pumps; German version EN 15879-1:2011
2011DIN EN 15879-1:2011-05 Testing and rating of direct exchange ground coupled heat pumps with electrically driven compressors for space heating and/or cooling - Part 1: Direct exchange-to-water heat pumps; German version EN 15879-1:2011
2011DIN EN 15879-1:2011 Testing and rating of direct exchange ground coupled heat pumps with electrically driven compressors for space heating and/or cooling - Part 1: Direct exchange-to-water heat pumps; German version EN 15879-1:2011