Build a gas heater today?

We already pointed out the calculations on the first page

please read carefully. I said "doesn't have to be that much better" It is clear that renovation is usually better than new construction. Also, using things longer. Not a new bathroom every 15 years. A bathroom can also last 40 years if you take care of it.

What must not be forgotten either. You always compare heat pump vs. gas. But that with gas a solar thermal system also has to be included is often forgotten. It hardly brings any savings either, but costs a lot of money and basically forces you to have a larger buffer tank.

Complete renovation of an old existing building does not have to be so much better for the environment than an ecological new building.

It is clear that in general renovation is better than new construction.

These two statements completely contradict each other. Please don’t come now with "case-by-case considerations," those can be constructed arbitrarily.

You always only compare heat pump vs. gas.

I don’t compare anything, but question absurd theories and speculations.

It hardly brings savings either, but costs a lot of money and practically forces you to have a larger buffer storage.

A certain saving already comes from a sealed bellows meter reading between May and September, but of course you won’t recoup the ~8,000 € investment anytime soon that way. You do it because you have to, although there are probably ways to build in compliance with the ST Energy Saving Ordinance without ST.

An ideological question: What is “greener” now, the condensing boiler with biogas tariff or the heat pump with lignite tariff?

Even though it is already far from the original topic, if you really want to act ecologically, you should not have built. I always find it very strange to argue on the one hand with ecology and environmental protection, but on the other hand to put up a new building that already inherently leaves a huge footprint.

At this spot stood an old house, built in 1951, still with the original wiring, uninsulated, water in the basement, only kitchen, living room and bathroom as walk-through rooms downstairs, bedroom without bathroom upstairs. We wanted a senior-friendly house because we are already 55 and 61 years old. Therefore, demolition and new construction.

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

1. What does a heat pump cost without photovoltaic?
2. What does the gas boiler cost without heat pump including gas connection and exhaust pipe?
3. What does a decent photovoltaic system cost (max. 9.9 kW without storage)?
4. Is the offer including underfloor heating with all accessories?

After that, we can give better answers.

Regarding 1. The one with 5.08 kW costs €9,990 net. The one with 10.7 kW costs €15,975 net.
Regarding 2. Not yet requested.
Regarding 3. €9,671 net
Regarding 4. The components for underfloor heating are extra.

Underfloor heating