ᐅ Installation of a Gas Heating System in New Construction 2023/2024

I can confirm that the maximum supply temperature of 48°C (118°F) is sufficient for an uninsulated building from the early 1970s; there is no need for 60°C (140°F). However, gas consumption remains unacceptably high.

Now, in the new construction with a heat pump and underfloor heating—designed probably for a supply temperature of around 35°C (95°F), a standard setup due to an uncooperative developer, reluctant plumber, and inexperienced HVAC planner—we have never set more than 25°C (77°F) supply temperature since January. The result: comfortably warm, pleasant heat, and no radiators in the way... Never going back to the old system. So even with a less-than-ideal system design, the full design supply temperature is not necessary.

xMisterDx schrieb:

Oh, storytime, I’m getting cookies.
...
So 37-40°C (99-104°F) is supposed to be enough for regular wall radiators? Better file that for a patent quickly—we’ve just discovered new physics!

One of our family houses (built in the post-war years) was recently equipped with new radiators to connect to the low-temperature circuit. It works perfectly. You can forget about your patent. Others are already far ahead of you.

K a t j a schrieb:

One of our family homes (built in the post-war years) was recently fitted with new radiators to connect them to the low-temperature heating circuit. It works perfectly. You can forget about your patent. Others are far ahead of you.

Interesting discussion, although it no longer relates directly to the original question, but that’s okay. I understand that as long as the law has not been passed, no one can say anything about its details. Understood.
However, despite the debate between the two “camps” here, I don’t understand: If this heat pump technology is so superior and suitable for virtually all buildings regardless of construction year, why is this law even necessary? It should sell like hotcakes on its own, right?!
PS: I have no idea how I’m supposed to maintain my hot tub at +40°C (104°F) with a supply temperature of just 25°C (77°F) when the outside temperature is -5°C (23°F).
Anyway – I won’t try it – gas simply burns hot. I believe in that and that’s what I’ll build.

Probigmac schrieb:

Why then this law? It should sell like hotcakes anyway?!

For what reason? A heat pump is three times as expensive as a gas boiler. The question is how long that will remain the case. I do have a few glass marbles here, but I’m afraid I lack the talent. 😉

Probigmac schrieb:

PS: How I’m supposed to keep my hot tub at +40°C (104°F) with a flow temperature of 25°C (77°F) when it’s -5°C (23°F) outside is beyond me.

Anyone who can afford something like that can also pay for the electricity. I recently heated my 300L (80 gallons) aquarium to 60°C (140°F) using immersion heaters to kill parasites. Just an idea... :p

K a t j a schrieb:

If you can afford something like that, you can also afford the electricity for it. Recently, I heated my 300L (79 gallons) aquarium with immersion heaters to 60°C (140°F) to kill parasites. Just an idea... :p

That I can afford it is unquestionable. But why should I waste expensive electricity on heating during winter when it’s much cheaper for me with gas and also heats up faster?
From what I’ve observed in the increasingly hysterical discussions in the media, it’s precisely about the economy: fewer people SHOULD be able to afford careless use of energy, especially fossil fuels. So, people are systematically drained of their money and made poorer. Some, unfortunately, have to reduce their covered swimming area by half to stay within budget. For many others, it will be even tougher: it means bundling up under a wool blanket in winter or investing a six-figure amount in insulation and a heat pump. Can’t afford that? Then just sell and move to a smaller apartment. Each of us also uses too much living space on average.

Probigmac schrieb:

It's obvious that I can afford it.

I wasn’t talking about being able to, but about having to. The idea of heating an outdoor pool in winter is no longer appropriate nowadays. And in my opinion, this also applies to your other energy concepts.

Probigmac schrieb:

But why should I waste expensive electricity in winter when gas is much cheaper and heats up faster?

CO2? Climate change?
Has all of that been forgotten again since page one? No wonder we aren’t making progress in this country. 🙄