Newly built single-family house - gas or air heat pump + photovoltaics + storage?

Yep. The new parts are quiet. And above all, they comply with current noise emission limits. You might want to make sure you don't get sold a model that came out 10 years ago. About three or four years since market launch, modulating, and preferably (but there aren't many) with R290. And of course, it always helps if you don't direct the noise exhaust straight at the neighbor's bedroom. Rotating it by 90° already helps a lot.

Yep. The new units are quiet. And above all, they comply with applicable noise emission limits. You should maybe make sure you don’t get sold a model that came onto the market 10 years ago. About three, four years since market launch, modulating and ideally (but there are not many) with R290. And of course, it always helps if you don’t aim the noise emission direction directly at the neighbor’s bedroom. Rotating it by 90° already helps a lot.

Thank you! It will be a Vaillant Arotherm Plus. We would position the air-to-water heat pump so that it does not point directly at the neighbor’s house. In a straight line, it would be 8m from the air-to-water heat pump to the neighbor’s children’s room and 20m each to the other two neighbors, who are then in direct line of sight to the air-to-water heat pump, but I hope that is not a problem.

The general contractor (or the appointed heating engineer) only installs Vaillant. We are also getting the controlled residential ventilation from Vaillant. We have no key data such as heating load calculation yet; we would have to inquire or commission that.

So, the groundbreaking has not taken place yet? Stop: I just read that construction is already underway… Then the data should already be available…

I can hardly imagine that, because hydrogen requires completely different and significantly higher-grade materials. Neither existing pipes nor pipe connections are suitable for hydrogen, and presumably not the heating system itself either.

Thanks for the info. Honestly, I was just repeating something I read on the internet (among others from a company that manufactures gas condensing boilers) and haven’t looked into it in detail yet. A lignite power plant near us is supposed to be converted to hydrogen, so I was probably a bit too optimistic. For example, I also hope for hydrogen cars. And for gas, I also rely on biogas and such. The prices for biogas are reasonable.

The problem with hydrogen is the underground efficiency. You can probably buy it at some point and put it in the heating system or the car. You just have to expect that heating and driving will then be at least five times more expensive than with electricity. You just have to want that. The next problem is the "sometime". By the time it gets there, we have to have been CO2-neutral for a long time. The problem with biogas is the endless land consumption and the destruction of the environment. We are already cultivating energy crops on 2% of our national area to generate about 1 percent of our final energy with it. The same area for wind and photovoltaics and we would be done with the energy transition. For this reason and due to the high costs and in turn poor efficiency, biogas production has been declining for some time.

We will talk to the two neighbors to find out whether they would (potentially) be disturbed by an air-water heat pump or not.

In my view, a good idea. Please keep us updated. I am particularly interested because we chose our property, among other things, based on the fact that there are no heat pumps installed in the neighborhood.