External insulation: house construction with Poroton T7 MW

What exactly do you not like about today’s heat pumps? From my layman’s perspective, the technology can definitely be considered mature after several decades. I don’t suspect that there will be any significant potential to unlock in the foreseeable future. Completely different technologies might promise more in the future, but you want to build now and not in some distant future, right?

As far as I have informed myself, you have to reckon with about 20k for a heat pump. Furthermore, problems can occur during drilling that can increase the costs (e.g. concrete casing). With a heat pump alone, you save on gas, but of course there will be electricity consumption. Since the price for this rises more sharply than for gas, it only makes sense to also use a photovoltaic system and use the electricity from it. You can’t do it without a storage system either. With an 8kWp system, including an electricity storage, you are at about 25k. With the heat pump, you then reach 45k.

For 45k, I get a gas heating system with gas for many, many years (at 6000 mwh/a/m² we are at about 400 euros).

I am an absolute fan of heat pumps and photovoltaic systems, but if the compound interest effects are already higher than the investment in the gas heating system + gas, how is this ever supposed to pay off? Maybe it's better to wait a bit and retrofit this later?

If something is wrong with my calculation, I would appreciate criticism ;-).

Do you really believe that there will be significant progress in this area, and that these advances will be cost-neutral or even cost-reducing? See. :) That’s why I can understand that you are now going for gas/solar thermal system, also that you might want to switch to WP later, but not that you basically want to create a PH in installments.

Good day,

As far as I have informed myself, you have to calculate about 20k for a heat pump.

An air-to-water heat pump is roughly the same price as a gas condensing boiler with solar domestic hot water heating; a geothermal heat pump requires between EUR 9.5k and 13k in additional costs, depending on drilling risk.

With a heat pump alone, you save on gas, but of course electricity will be consumed.

Name me a heating system that works without electricity? Properly dimensioned—that is, designed for the overall situation—heat pumps consume hardly any electricity.

I am an absolute fan of heat pumps ...

In my opinion, it reads as if you have not yet had a really good consultation? Otherwise, statements like the above would not occur.

Rhineland regards

Good day, an air-water heat pump is roughly the same price as a gas condensing boiler with solar domestic water heating, .....

Hardly, unless there is an absolute supply distortion! ;-)

...a ground source heat pump requires additional costs between TEUR 9.5 and 13, depending on drilling risk....

How does one arrive at this when not even the actually required annual extraction energy for heating and domestic hot water, nor the respective required cooling extraction capacity, are known? ;-)

best regards