Geothermal energy or gas condensing boiler?

The connection costs for gas are already included, they are 1500 € for me. Such a GWTH is indeed quite cheap, you can easily get one for 3000 € (without solar), leaving 1500 € for the installation, which should already be generous. Please do not forget, we are only talking about the heating down in the basement, the actual underfloor heating is basically the same for all systems and therefore not shown here.


I have heard from our neighbors that maintenance costs can sometimes be significantly higher. Figures of up to 500 € every two years are circulating, so 250 € per year. If they have since become lower, that will certainly have an effect.
With a GWTH there are indeed costs for the chimney sweep, 85 euros every three years, so just under 30 € per year.

But of course, one can still discuss the values, whether all assumptions are correct, etc... The table is certainly not the last word in wisdom, but in my opinion shows a fairly clear tendency.

I only put it together for myself because several salespeople always wanted to convince me that a heat pump is definitely and always much cheaper. And I certainly don’t believe that anymore....

Best regards,

Andreas

I think that a shift in the final values with different connection costs can be left up to each individual, so that is already a great help. I just thought that with [Brennwert] the costs for installation/chimney (including all costs in the building) with acceptance might be a bit more expensive, but it doesn't have to be.

Good evening Andreas,

the connection costs for gas are already included, for me they are 1500 €. Such a GWTH is indeed quite cheap, you can easily get it for 3000 € (without solar)

A normal gas boiler with flow temperature; but not a proper gas condensing boiler, I simply don’t believe that ... sorry. A good Viessmann for example starts at €4.4k and we are not even talking about installation costs yet.

But of course one can still discuss the values, whether all assumptions are correct, etc... The table is certainly not the final word of wisdom, but in my opinion it shows a quite clear tendency.

This discussion is, in my opinion, pointless insofar as you won’t get far with "only" gas under the new energy saving regulation; it’s also not enough just to add solar for domestic hot water. That already doesn’t fit with the current energy saving regulation.

I just put it together myself because several sellers always wanted to make me believe that a heat pump is always and in any case much cheaper. And I no longer believe that at all....

That is always relative. If you keep in mind that the differences in purchase price between a gas condensing boiler and an air-water heat pump are comparatively small - you also save yourself the gas connection, for instance - the calculation looks quite different. The pure consumption costs gas versus air-water heat pump do not differ that much for a KfW 70 energy-efficient house. They are significantly cheaper when using a brine-water heat pump, but its initial investment is so high that it almost amounts to a hobby ... in new single-family house construction

Rhenish greetings

A normal gas boiler flow temperature.; but not a reasonable gas condensing boiler, I simply don't believe that ... sorry. A good Viessmann for example starts at €4.4 and then we're not even talking about installation costs.

link removed by mod

This discussion is, in my opinion, pointless, insofar as you won't get far with "only" gas under the new Energy Saving Ordinance; adding solar for domestic hot water is also not enough. That already doesn't fit with the current Energy Saving Ordinance.

According to information from our general contractors, "only gas" is often enough nowadays with controlled residential ventilation, it just has to be calculated. Why should gas not be possible under the new Energy Saving Ordinance?

That is always relative. If you consider that the differences in purchasing a gas condensing boiler and an air-to-water heat pump are comparatively small – you save, for example, the gas connection, then the calculation looks completely different again. The pure consumption costs gas ./. air-to-water heat pump also do not differ that much in a KfW 70 efficient house. They are significantly cheaper when using a brine-to-water heat pump, but its initial investment is so high that it almost comes down to a labor of love .... in a single-family house new build

4,500 EUR funding for the brine heat pump offset? I rather see it so that an air-to-water heat pump is not worth it at all. Either gas (possibly mandatory solar) or geothermal with BAFA funding.

You have been here long enough to know that advertising links are not allowed according to the terms and conditions.
If you do not want to adhere to this, the same thing will happen to you here as it did over there.

Advertising link? That was just a source, but fine as text:

Vitodens 200-W for 1,710 EUR. With installation accessories, storage connection, and exhaust package not even 2,300 EUR. For 4,400 EUR, there are two of them.