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- Heat pumps @planning:building_services:heating_and_dhw:heating
- es:compact_hvac_systems:certification_and_primary_energy_balance_calculations_for_compact_heat_pumps|Certification and primary energy balance calculation for compact heat pumps]] [[p
- Experience with drain water heat recovery @planning:building_services:heating_and_dhw:experience_with_drain_water_heat_recovery
- ===== References ===== **[AKKP49]** Volume 49 "Energy-efficient hot water systems" of the proceedings o