ᐅ Comparison of Different Heating Systems

kbt09 schrieb:

What’s supposed to be advantageous about this ... gas connection including the basic fee, just in case of bad weather?

In option 1, the photovoltaic support is logically missing ... instead of the solar thermal system from option 2.

In winter, for example, it’s hardly possible to reach 60°C (140°F) without additional heating.
A heat pump struggles to reach 60°C (140°F) at subzero temperatures anyway. Anything significantly below that is too risky due to bacterial growth.

This isn’t about me, but about concepts that make sense today.
With current interest rates, you could save the extra cost for underfloor heating and photovoltaic panels, heat the house with an air-to-air heat pump, and come up with a small traditional system for hot water.

How would the differences in operating costs compare?
Are there significant differences in heating costs between an air-to-water system with underfloor heating versus an air-to-air multi-split heat pump?

1. How do you arrive at 60 degrees? If we assume something like that, there is no point in discussing its practicality.
2. All significant differences are mentioned in the thread linked above.

Nutshell schrieb:

It’s not about me, but about concepts that make sense today.

There is a wide range nowadays. Even if we exclude unrenovated old buildings... from passive houses to renovated old buildings with, let’s say, 60 kWh/m² (approximately Efficiency House 100), you can’t apply the same approach. And even if you only consider new builds, the range from EH55 to passive houses still covers a lot of ground, with more or less suitable heating concepts accordingly.
If you want to avoid underfloor heating, you can use an air-to-air heat pump with electric heating elements integrated into the ventilation. Domestic hot water can then be provided by a water-to-water heat pump. It’s not likely to be so inefficient that you’d need a gas connection with the associated fees again. Alternatively, you can save money on the water-to-water heat pump by using a boiler with an electric heating element.

Nutshell schrieb:

... with 60 degrees. Anything significantly below that is too risky due to microbial growth.

Hello,
this general statement is obviously nonsense for a single-family home, which is what this forum mostly focuses on...

What incredible fees can you expect when connecting to the gas supply?

If you’re planning to install gas in your house anyway, go for a complete gas heating system combined with solar thermal technology.

Regarding the ban and so on: that won’t happen, and gas and oil prices won’t increase drastically. Otherwise, around 50% of the population simply wouldn’t be able to heat properly. Right now, we already have 21% support for the AfD in the polls...

This is often forgotten by heat pump enthusiasts. Yes, heat pumps make sense in new buildings. But at least 70% of the buildings in Germany are not suitable for them without additional measures.

So what should they heat with then? Hot air from forum users here?

Solar thermal is at least as useful as photovoltaic systems. Since May, we haven’t consumed a single kWh of gas. For that, 5m² (about 54 sq ft) of panels cost me around a thousand. Photovoltaics, however, is not a great investment at a 4% interest rate and still relatively high prices.

xMisterDx schrieb:

The ban and so on will not happen, and gas and oil prices will not rise sharply. Otherwise, easily 50% of the population simply wouldn't be able to heat adequately anymore. We already have 21% AfD in the polls...

This is often forgotten by the heat pump enthusiasts. Yes, it makes sense in new builds. But at least 70% of buildings in Germany are not suitable for heat pumps without additional measures.
So what are they supposed to heat with then? With the hot air from forum members here?

What do you think the whole, now Europe-wide, energy policy is about? The Building Energy Act, BEW, and "Fit for 55" set the framework, and this is non-negotiable.
The CO2 price will certainly rise to 200 €/t (or likely more). Currently, I think it is about 35 €/t.
This significantly increases the pressure on conventional energy producers.