Manufacturer
Daikin Altherma units are built around low-temperature heating. If the house has radiator heating and the flow temperature is kept high, a large part of the unit's advantage is lost.
Altherma performs best at a flow temperature of 30–40 °C. If your system needs 50 °C, first check the radiator balancing and the rooms' actual heat demand rather than raising the setpoint.
Producing hot water during warmer parts of the day (or during a cheaper tariff period) reduces compressor load. We recommend avoiding hot water production during the coldest night hour, when outdoor air is coldest.
Typically 28–35 °C for underfloor heating, 40–48 °C with radiators. Every degree lower is estimated to reduce electricity consumption by 2–3%.
Yes, but the result depends on radiator surface area. If the flow temperature has to stay above 50 °C constantly, the savings are modest and we recommend reviewing the system.
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