Gas with solar thermal? Or heat pump with photovoltaics? Consultation

And how does the pipe reach the roof? You don’t vent the exhaust gases on the ground floor. My Panasonic air-to-water heat pump costs 2500 euros and has an annual performance factor of 4.65 You just have to size it properly...

The pipe is simply led upwards through the roof; you don’t need a chimney for it. The Geisha was actually a good solution, but its successor supposedly has a slightly lower annual performance factor. If I wanted an air-to-water heat pump, I would have liked that one. But I am also considering a brine heat pump because of the size of our property (ring trench collector possible). What is your annual heat consumption?

Do you have any sources for this untrue claim? However, I know that the manufacturers design the systems for a maximum of 15 years, these air pumps often fail after 5 to 10 years. You can probably operate gas condensing boilers for 30 years without major repairs.

I don't believe in the heat pump, although I have one myself. By the way, it has already had a lot of defects.

In 2016, I dealt with this more extensively. If you have more accurate information that they are designed for 15 years, please feel free to share it with us. Stiebel itself officially states 15-20 years. For example, I was just recently at a birthday of acquaintances who bought a house from the 90s, where a heat pump has been running since then, not particularly efficient, but it runs. It then shouldn't even exist, since it is older than 20 years. Viessmann speaks of 2 million heating systems in Germany that are older than 25 years. I don't find that particularly many if a gas heating system can easily achieve that. There simply lack reliable figures and long-term experiences to have really more than feelings. Why did you decide on a heat pump if you don’t believe in it? There could have been alternatives like pellets, etc.

The pipe is simply routed upwards through the roof, no chimney is needed for it. The Geisha was actually a good solution, but the successor is probably somewhat worse in the annual performance factor. If I wanted an air-to-water heat pump, I would have liked that one. But I am also considering a brine heat pump due to the size of our plot (ring trench collector possible). How high is your annual heat consumption?

I myself am still building. I always refer to my brother's house, which I planned and executed the building services for the year before last. Approximately 7800 kWh/a, which means about €40/month heating costs including hot water. KFW55, 3 persons, controlled residential ventilation 90% including shower drain. What is often forgotten is that the heating demand is higher in the first years due to moisture. A ring trench collector in DIY work can already be worthwhile depending on the standard temperature... The difference to the old Geisha was, calculated, annual performance factor -0.05

For example, just recently at acquaintances’ birthday who bought a house from the ’90s, a heat pump has been running there ever since, not particularly efficient, but it's running.

I bet the heat pump was designed like a conventional heating system and therefore does not run efficiently...

Only no heating engineer offers something like that. Including makeshift solutions in the comparison has something of a hobby workshop. Even if the solutions are often good.

There are also other similar monoblock heat pumps that are somewhat more expensive and installed by companies.

For example, the piston pump from Grundstück Wärmesysteme. Provided you can negotiate properly...

Apart from that, the Geisha is not a makeshift solution...

By the way, the house in the previous post is 150m²

I compare something like that with the Chinese gas boiler from Shenzhen Industrialpark Heating Solutions. 500,- plus 5.95 shipping, possibly some customs duty may also apply.

I compare something like that with the Chinese gas boiler from Shenzhen Industrialpark Heating Solutions. 500,- plus 5.95 shipping, possibly some customs fees on top.

If I remember correctly, you are also a fan of Polish windows. So why be so skeptical when it gets even more eastern?

Apart from the fact that most heat pumps also come from regional manufacturers in the Far East. Whether development or production.