Air-water heat pump current consumption and data

Energy mix a term? Switching everything to electricity will not be feasible. People still buy new cars with gasoline and diesel engines.

Looking soberly, gas heating initially has worse CO2 emissions, depending on which electricity powers the heat pump, it could be the other way around.

But a gas heating system combined with [Photovoltaik] and [Kollektoren] is certainly anything but climate-hostile. Operating a heat pump but flying overseas twice a year is hypocritical climate policy. Where do we start, where do we stop?

We will stop using diesel, gasoline, and gas heating first of all, because that is relatively easy and already possible. Everything will have to run on electricity; there is no alternative. And I fly neither saintly nor hypocritically overseas. These platitudes always come up at the end of such discussions anyway... And it is clear that the electricity for the heat pump must come from renewable sources. It already does so by 50%, quite automatically. The trend is rising. Those who want more can: use photovoltaics, if necessary storage, and buy green electricity. There is also genuine, one hundred percent renewable electricity on the market. If more people did that, we would have already made the switch long ago. So: willingness to change? Doing something for the children and grandchildren? Currently, there are good incentives. Or rather keep one’s horizons nicely limited? Everyone can consider that for themselves. But in the end, don’t complain if bans and enormously increased costs are the consequence.

Sorry, by the way, maybe a could move the side discussion? Bookstar and I probably got a bit carried away there... :-)

No, I probably wrote that. And I am also in favor of replacing fossil fuels as quickly as possible, where feasible. But there are scenarios that are absolutely realistic and make a heat pump look worse environmentally as well. One kWh of electricity still had over 460 g/kWh CO2 in 2018 (source: UBA) (gas 202 g/kWh). That will certainly decrease as the share of renewable electricity generation increases and the share of coal decreases, but to stabilize the power grid, fast-start gas power plants will still be needed in 2038, and coal will only be completely banned by 2038. So the CO2 share in the electricity mix will not drop to zero in the next 20 years (or even 50). On average, a poorly adjusted heat pump (seasonal performance factor 2) without a green electricity tariff can of course produce more CO2 than a gas condensing boiler. If you also consider that the poorly adjusted heat pump breaks down more often on average... Is that desirable – certainly not. But simply saying, use a heat pump, it is more environmentally friendly, just conceals half of the necessary prerequisites.

No.

Currently, we are at 400 watts with standard modules (1.7*1.0 m). I think that's quite decent.

, you seem to be quite deep into the subject. Do you have a concrete recommendation regarding the price/performance ratio specifically for the mentioned standard modules =< 1.7m*1.0 m? For me, it is the ideal size to best cover the roof. At the moment, however, I am getting used to the 340s from Axitec. If there are good 400s for an insignificant surcharge, that would be interesting.

One kWh of electricity still had over 460 g/kWh CO2 in 2018 (source: UBA) (gas 202g/kWh).

You really chose the worst numbers ever (three years old, annual performance factor of 2) and yet the two were already equal three years ago. So what exactly is your point again?