ᐅ Still installing a gas heating system today?

Even though this is quite far from the original topic, if you really want to act ecologically, you shouldn’t have built at all.

I always find it strange to argue with ecology and environmental protection on one hand, and on the other hand put up a new building that inherently leaves a huge footprint.

Specki schrieb:

People are too ignorant to voluntarily spend more money on better environmental protection.

That is the core of the problem.

Specki schrieb:

prices need to change.

The problem is that right now the Russian is able to sell us gas at an unbeatable low price and is by far not yet at the pain threshold on the downside. On the other hand, costs are exploding for electricity grid operators due to the continuous expansion of market-distorting power generation. Power that is completely worthless on the market, as it is produced without regard to demand, must be paid to producers at exorbitant rates and sold abroad at negative prices to maintain grid stability. The spot electricity price will, of course, continue to fall. But grid fees will only go one way in the coming years: sharply upwards.

T_im_Norden schrieb:

If you really want to act ecologically, you shouldn’t have built at all.

Sorry, but that’s not a valid argument.

I could just as well say that if you want to produce as little CO2 as possible, you should simply die now.

This topic is not black and white. It doesn’t work that way!
Even renewable energies come with environmental impacts. Solar panels have to be manufactured, and yes, wind turbines do kill birds (although not as many as is often claimed).

I also want electricity from the outlet, not to wash my machine by hand in the nearest stream.

It’s always a matter of weighing options individually.

And a complete renovation of an old building doesn’t necessarily have a significantly lower environmental impact than an ecological new build.

As I said, everyone has to decide for themselves. Personally, I would no longer install a gas heating system in a new build nowadays. Mainly for environmental reasons, but also because I believe that over the long term, the costs won’t differ that much, and I prefer to invest in the more future-proof solution.

Specki schrieb:

And even a complete renovation of an old existing building does not have to be significantly better for the environment than an ecological new build.

Well, the shell alone contains about 2000 kWh/m² of embodied energy. In a KfW55 EPS bunker, you can expect a considerable additional amount. If you put in the effort, you can barely consume that much energy within a 35-year service life.
So yes: renovating existing buildings is more ecological than building new. And the proverbial energy invested in constructing your new building exceeds the heating energy demand you will have during its use phase.
That small amount of heating energy does not significantly increase the total energy demand of a new build, which is already quite high. But with green electricity, heat pumps, photovoltaics, and external thermal insulation composite systems (ETICS / EIFS), you can still do impressive greenwashing.

Heidi1965 schrieb:

For our new build, we originally planned to install an air-source heat pump and generate the electricity for it, as well as part of our other electricity needs, using our own photovoltaic system and battery storage. After receiving two quotes, we now have some concerns. The lowest quote for a heat pump with 5.08 kW, a photovoltaic system with 5.1 kWp, and a battery with 5.12 kWh is €33,000. Should we perhaps just opt for a conventional gas boiler instead? That would definitely be cheaper. Or is that completely outdated nowadays?

Do you have a cost comparison for us? There is already a lot of discussion about consumption, costs, ecology, etc.

1. What is the cost of a heat pump without photovoltaic?
2. What is the cost of a gas boiler without a heat pump, including gas connection and flue pipe?
3. What is the cost of a reasonable photovoltaic system (max. 9.9 kW without storage)?
4. Does the quote include underfloor heating with all necessary accessories?

After that, we can provide better answers.

An argument consists of a position and a justification.

Position: Those who truly act ecologically do not build new.
Justification: New construction creates a huge ecological footprint.

As you can see, this is indeed an argument, which you have not refuted.

I would ask you to refrain from rhetorical tricks.