Difference in purchase cost between gas pump or heat pump

  • Erstellt am 2019-12-14 15:33:02

ludwig88sta

2019-12-18 13:10:14
  • #1


Yes, the minimum temperatures really depend heavily on the latitude in Germany. In the south, you will probably need to choose an air-to-water heat pump with a lower bivalence point.

**Edit: Are there actually air-to-water heat pumps that switch on a small gas boiler when the bivalence point is reached? Instead of an electric heating spiral.**
 

guckuck2

2019-12-18 13:10:24
  • #2


You have that more or less with every air-water heat pump. The thing also freezes. There are also heating elements for automatic defrosting, etc.
 

Mycraft

2019-12-18 13:37:38
  • #3
That would render the whole system absurd. Because then you would need a LAS and gas connection again anyway. The costs would outweigh the benefits.
 

ludwig88sta

2019-12-18 13:46:01
  • #4


But if the gas connection is already on the property and you actually only pay for the gas that is consumed. For a duration of about 1-2% of the total operating time per year, during which the output is below the bivalence point. But sure, even heating with electricity (= heating element is on because below the bivalence point) is relatively expensive for the short time. It will still clearly be more economical than acquiring / maintaining a small extra gas boiler + LAS costs, etc. That's true.
 

ludwig88sta

2019-12-18 13:54:36
  • #5


I just quickly searched on DuckDuckGo and found articles that partly show significant minus temperatures in Bavaria in recent winters (the most extreme was Funtensee, 28.02.2018, -40.3 degrees). If I build in an area where it can sometimes get to -20 degrees and the heat pump switches off at -20 degrees. Then ideally I fuel the hopefully installed fireplace, right? Otherwise, you'd be sitting in a house that wasn't heated overnight?

But I do understand that -20 degrees are becoming increasingly rare / are rarer.
 

hegi___

2019-12-18 14:08:33
  • #6
There is a "Wärmepumpen Klimakarte" where you can read the relevant temperatures.

Where is the problem if the heating element turns on once a year? That's what it's there for.

When smartly controlled, you ideally only heat the house at midday anyway when the sun shines on your photovoltaic system.
 

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