How to effectively reduce power consumption in BWP and circulation line?

  • Erstellt am 2023-12-18 08:54:23

Gnadenpinsel

2023-12-18 08:54:23
  • #1
Hello,

the old hot water boiler of the oil heating system recently and suddenly broke down for us. Therefore, a domestic hot water heat pump (BWP) with 270 liters (4 persons) was newly installed a few days ago (recirculation mode) and connected to the available hot water circulation. The circulation is quite helpful because otherwise hot water sometimes takes quite a long time. A mechanical timer switch was installed, the circulation pump now does not run for 7 hours at night and is also interrupted for 3 hours during the day.

I have some general questions about this, perhaps you can give some tips:

1. How can the electricity consumption be reduced as effectively as possible when the BWP is connected to the circulation line (which is rather poorly insulated in the house)?

2. According to the energy saving regulation, the circulation pump must run at least 16 hours daily to keep the pipes free of germs. Is this really that important in practice?

3. What set temperature is generally recommended for the BWP itself? Legionella protection with 62°C takes place once a month according to the settings.

4. The boiler room where the BWP is located has only about 16 m³ volume. 20 m³ are recommended. Forced ventilation (ventilation grille with noticeable fresh air) is present due to the oil heating system. However, the room (normally about 20°C) cools down noticeably by up to 5-6°C (14-15°C) during the longer recirculation operation of the BWP. Afterwards, the temperature rises again. Is this still okay or should I discharge the exhaust air outside to increase the efficiency of the BWP?

Many thanks for your feedback.
 

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