Gas vs. Air-Water Heat Pump

  • Erstellt am 2019-12-29 16:34:21

michert

2020-01-02 09:41:08
  • #1
Sure? Isn't it enough to simply install one of the listed WPs?
 

hausbauer

2020-01-02 09:51:58
  • #2

Yes, sure. No, it is not enough.
 

hampshire

2020-01-02 09:52:21
  • #3
Preserve liquidity: gas heating
TCO: rather heat pump - depends on assumption parameters (energy carrier prices, service life, maintenance...)
Environmental protection: gas only if non-fossil, electricity only if renewable, electricity easier to buy sustainably - so heat pump
 

boxandroof

2020-01-02 10:14:01
  • #4

BAFA: Until now, it was required to prove it on paper. Location in Germany and the share of hot water influence the calculation. Calculating an annual performance factor of 4.5 with an air-water heat pump is not quite easy, but not impossible either. The heat pump must be listed in order to be eligible for calculation at all. With a horizontal collector or geothermal energy, the subsidy was certain.
I doubt that the calculation now shifts in favor of the heat pump solely because of the subsidy. The BAFA subsidy is not as well known as the KfW loans and, due to lack of self-interest, is also rarely advertised by providers. One has to know this and take care of it.

In addition to the TCO: the purchase price of the heat pump is likely to significantly influence the calculation. The margins are wide. Whether the heat pump pays off over time is mainly influenced by the performance factor and the quality of the planning of the heating surfaces and hydraulics. It does happen that both acquisition and operating costs of the heat pump are higher than with gas. This does not have to be the case (see post #3).
 

ludwig88sta

2020-01-04 13:19:38
  • #5
Currently, a lot is happening regarding heat pumps. I recently read a WeLTplus article that stated heat pumps could become the new hazardous waste in a few years. Additionally, in winter—if planning is poor and demand is high—heating with electricity can cause the price to really skyrocket (especially for homeowners who blindly trust the general contractor, because they care less about the future electricity consumption in winter).

On the other hand, the EGG surcharge for electricity for heat pumps is supposed to be removed soon, which could mean that one gets a separate electricity tariff for their heat pump that is then significantly cheaper than regular electricity at present, since it would be without the Renewable Energy Act surcharge.

A lot will certainly happen in the coming years. I don’t dare to say in which direction. I see it similarly to electric cars. One simply cannot say for sure whether the electric car will firmly establish itself (even though our government, overwhelmed by the energy transition, acts like it’s rock solid). The hydrogen topic. Similarly, hydrogen could play a major role in energy supply for single-family homes in the coming years (electricity storage over the seasons?). But since people tend not to know but only gamble—which can also be wrong—I will probably decide on a gas boiler (that has worked very well and cheaply in recent decades, and improvements toward less environmentally harmful gas can also happen). Sure, gas prices can also explode—just like electricity prices, but no one here truly knows.

Naturally, one should plan accordingly so that if heat pumps are the absolute number one in 10-15 years and not, as the article says, the new hazardous waste that consumes a lot of electricity over winter for many, one can also get one (low supply temperatures with underfloor heating and good heating loops < 100 m, etc.). Until then, the gas boiler with its low acquisition costs will have certainly served well!
 

michert

2020-01-04 13:33:48
  • #6
What is supposed to be hazardous waste about a heat pump if you pay attention to the appropriate refrigerant, e.g. propane?
 

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