ᐅ Difference in Initial Costs: Gas System vs. Heat Pump

guckuck2 schrieb:

In addition, electricity costs should decrease due to the reduction of the Renewable Energy Act levy. This does not exclude the possibility that electricity tariffs based on fossil fuels will become more expensive, as CO2 charges will be applied there (either directly shown in the electricity price or included in the producer price).

That is clear. However, the Renewable Energy Act levy is included in every kWh of electricity, regardless of its source. Therefore, coal-generated electricity would also become cheaper—and that does not make sense.

ludwig88sta schrieb:

Are there any other factors besides low-temperature underfloor heating to consider when building a single-family house in 2020 with a planned gas heating system, so that it would be possible to switch to a heat pump in a few years if needed?

- Well-insulated building envelope
- Mechanical ventilation with heat recovery
- Plan the utility room accordingly (space for a heat pump and provision for an outdoor installation)

bernie schrieb:

- Plan the utility room accordingly (space for the heat pump and space for an outdoor installation)

@guckuck2 suggested a split heat pump, so plan the utility room in the basement, where there is space for the heat pump outside in the garden.
Okay, thanks!

bernie schrieb:

That’s clear. However, the Renewable Energy Act surcharge is included in every kWh of electricity, no matter the source. So coal-generated electricity also becomes cheaper – and that doesn't make sense.

The actual electricity mix at your socket is unknown. How could pricing regulation be based on that? The Renewable Energy Act surcharge applies equally to every kWh, regardless of whether the electricity at the socket is actually 100% coal, nuclear, or renewable. It doesn’t matter if you signed up for a tariff with a different energy mix. Therefore, the surcharge only goes “up for everyone” or “down for everyone.”
The Renewable Energy Act surcharge is meant to finance renewable energy sources. You pay it regardless of the electricity mix.
This doesn’t make coal power cheaper; on the contrary, the cost component for generating coal power is rather higher because the power plant operator emitting CO2 must pay for those emissions.

ludwig88sta schrieb:

@guckuck2 mentioned a split heat pump, so planning the technical room in the basement, with space outside in the garden for the heat pump unit.
Okay, thanks!

Yes, the building must be prepared to retrofit a heat pump. Usually, split systems are used, meaning refrigerant lines and power supply are needed to the location of the outdoor unit. The installation site should also be suitable, for example not on your own terrace or too close to a neighbor.
An air-source heat pump located inside is also possible but requires sufficient space in the room and two relatively large openings for supply and exhaust air.

I always like to say that the so-called Geisha air-to-water heat pump costs around 2500 euros as a monoblock unit. No gas line, no chimney, and an annual performance factor (COP) of 4 is quite achievable.
With some skill, installation can be done by yourself.
There are countless examples.

hegi___ schrieb:

I like to say again and again that the so-called Geisha air-to-water heat pump costs around 2,500 euros as a monoblock unit. No gas line, no chimney, and an annual performance factor of 4 is definitely achievable.
With some skill, installation can also be done DIY.
There are countless examples.

+ no maintenance, no chimney sweep, and the photovoltaic electricity can be used directly.

In my opinion, gas no longer makes any sense.