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Experience with drain water heat recovery @planning:building_services:heating_and_dhw:experience_with_drain_water_heat_recovery

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ed savings in specific cases (see AkkP49).\\ The following points are particularly important:\\ * Savings

Sound generation, sound dispersion and sound proofing in heat pumps @planning:building_services:heating_and_dhw:heating:heat_pumps

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:heating:heat_pumps#literature|[VDI 3731] ]]. The following sections deal with the subject of the sound sourc