Division 3.7 Remarks related to non-electrically driven heat pumps

The heat pumps that do not use electricity, either use liquid or gaseous fuel to drive the compressor, or use an ad/absorption process (driven by combustion of liquid or gaseous fuel or by use of geothermal/solarthermal energy or waste heat) are delivering renewable energy as long as the ‘net seasonal primary energy ratio in active mode’ (SPER_net) is 115 % or larger than that value^f1.