Air-water heat pump: additional costs for eligible system justified

2020-06-22 10:41:05

Hello dear forum,

we are currently in the process of realizing our planned new construction project.
Now the heating engineer came and informed us about the eligibility for funding from Bafa for air-to-water heat pump systems.
Originally, we had planned an air-to-water heat pump for indoor installation (because we do not have an ideal location for a split unit due to the structural conditions).
We have underfloor heating planned throughout the house, heated floor area approx. 190m².

Now he comes with the information that in order to receive the subsidy, a system with corresponding values is required and that it only works with a split unit. And additionally, there are extra costs of about €5000, which, however, I will more than make up for through the subsidy of about €7000 in the end.
Originally planned was a Stiebel Eltron system for indoor installation, now it is supposed to be a Rotex with an additional cost of €5000.

Since I am an absolute layman when it comes to heating systems, I can hardly make sense of the statements and hope for your tips.
Now to my questions:
- Is it really the case that the eligible systems make such a big price difference?

- Are there really no eligible systems for indoor installation?

Many greetings
nick205

2020-06-22 11:29:12

Since I am an absolute layman when it comes to heating systems, I can make little sense of the statements and hope for your tips.
Now to my questions:
- Is it really true that the eligible systems cause such a high additional cost?

- Are there really no eligible systems for indoor installation?

Best regards
nick205

Hello Nick,

too little info to assess it precisely.

Basically:

- Additional cost sounds extremely high. But you don’t just have different systems, also different suppliers. So apples and oranges. Nevertheless, it sounds like a lot. -> more info

- Of course, there are systems for indoor installation that are eligible for funding. I’m getting an IDM ILM 2-7. We are getting the subsidy. Only he might not sell that one.

More info:

- Is there already a contract with the heating installer or could you possibly still switch to another one?

- NAT (standard outdoor temperature) at your location. If unknown, you can find it with a search engine. The system is “adjusted” to this value.

- Is there already a room-by-room heating load calculation? Or at least a building heating load?

- What flow/return temperatures does your heating installer calculate with?

With this info one could at least roughly estimate what is possible.

I suspect the installer is using the subsidy to take a bit more for himself.

Regarding the subsidy, there is a calculator on the internet. A few factors flow into it. The heat pump, of course. If that’s not enough, you can take a “better” one. But mostly it makes more sense to find out if it’s better not to operate, for example, with 35 degrees flow but with something tending toward 30. Maybe you need to lay the underfloor heating pipes a bit closer or add a wall heating in the bathroom. That doesn’t cost the world and above all, it really reduces your heating costs permanently.

2020-06-22 12:26:25

Hello Nick,

too little info to assess it precisely.

Basically:

- Additional cost sounds extremely high. But you don’t have just different systems, also different providers. So apples and oranges. Nevertheless, it sounds like a lot. -> more info

- Of course, there are indoor units that are eligible for funding. I am getting an IDM ILM 2-7. We get the funding. Only he might not sell that one.

More info:

- Is there already a contract with the heating installer or could you possibly still switch to another one?

- NAT (standard outdoor temperature) at your location. If unknown, you can find it using a search engine. The system is “aligned” according to this value.

- Is there already a room-by-room heating load calculation? Or at least a building heating load?

- With which flow/return temperatures does your heating installer calculate?

With this info, one could at least roughly estimate what is possible.

I suspect the heating installer is using the funding to grab a bit more for himself.

Regarding the funding, there is a calculator on the internet. A few factors are involved. The heat pump, of course. If it’s not enough, you can take a “better” one. But usually it makes more sense to find out whether it’s better not to run, for example, at 35 degrees flow temperature but something tending toward 30. Maybe you have to lay the underfloor heating a bit closer or add a wall heating in the bathroom. But that doesn’t cost the world and above all it actually permanently reduces your heating costs.

Thanks for the quick reply.

To me, despite being a layperson, it also seemed very high, so I wanted to inquire about it here.

Unfortunately, I currently have no further details since it is going through a developer. I will try to get more info about the two systems.

2020-06-22 12:39:57

Developer (purchase finished house including land from the same company)? Or contractor (purchase land from someone else and contractor only builds the house)?

Would you have the option to have the heating trade removed?

Did you receive my PM?

2020-06-22 12:51:45

The installer should confirm the amount of the subsidy to you in writing. If that does not happen, then he should cover the costs :-P

2020-06-22 12:55:52

Developer (buying a finished house including land from the same company)? Or contractor (buying land from someone else and the contractor only builds the house)?

Would you have the possibility to have the heating trade removed?

Did you get my PM?

The contractor is building the house, we already have the land.
We wanted to have the big parts done from one source, so awarding the heating separately is rather not an option.
No, I have not received a PM.

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Air-water heat pump: additional costs for eligible system justified

nick205

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nick205

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