Air-water heat pump current consumption and data

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

I'm not really that deep into the module subject. But the 400 mark is currently being adopted by more and more companies. SunPower started it. LG is following suit. I've also heard something about Trina. And then a old German company will come back to the market in the middle of the year. But I would have to look it up again, I can't remember the name. In terms of price/performance, the 400s are not yet recommendable. You still pay almost double (SunPower), compared to, for example, Q-Cells 350s. So it only makes sense if you really "need" high performance on a small area. I have just recently decided on Solarfabrik 375 modules for my new systems. They are, I believe, quite well positioned under 200,- € at the sweet spot. If you want to build cheaply (yourself), you can also take 330 modules (from pretty much all manufacturers), you can often get them for 120,-€ each, practically as leftover stock.

I have just decided on Solarfabrik 375 modules for my new systems. I think they are quite well priced, just under €200, hitting the sweet spot.

Thanks! 375-watt with the same module size? Could you please provide the model name? I'll check it out when I get the chance...

So what exactly is your point again?

[...] simply saying, take a heat pump, it’s more environmentally friendly, just hides half of the necessary requirements.

Implicitly, my point was also that you can make the numbers look good or bad however you want. I don’t know how the ban is being implemented in Austria, but if, for example, all gas heaters had to be replaced at once, this would be worse for the environmental balance than letting the gas heaters run out their normal service life. The production of a new heat pump (which wouldn’t actually be needed yet) also has a negative impact.

My recommendation, if someone asked me: "What kind of heating/heating system should I choose to be as environmentally conscious as possible, with reasonably manageable costs?"
- "A heat pump will be the best alternative under the following conditions:
- Find a building services office (TGA-Büro) that calculates and plans your heating load under the specification of desired room temperatures together with the design of the heating system and hydraulics.
- Find a heating installer (HSLer) who knows about heat pumps and is willing to install according to an external plan (from the TGA office).
- Perform a thermal balancing during the first two heating periods. Probably do it yourself, because no heating installer will come by for 10 minutes on several consecutive days to do this.
- Choose a 100% green electricity tariff and/or get a photovoltaic system that can feed into the heat pump."

Where the first two points are almost more important than the final choice of the heating device. Because with proper design and execution, a gas condensing boiler will, of course, also run more efficiently and then can easily be replaced by a heat pump later on (requiring as low a supply temperature as possible).

Well summarized. Anyone who still wants to heat economically now uses the gas boiler and then upgrades in 20 years. Due to the lack of a gas connection, however, I also have a heat pump.

, 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*1.0m?
For me, it is the ideal size to cover the roof as best as possible. Currently, however, I am warming up to the 340s from Axitec.
If there are good 400s for a negligible extra cost, that would be interesting.

For me, the surcharge for 400s was about 2k€ compared to 340s for 20 modules. I don't think it paid off even after depreciation. And I can also multiply the saved 2k€ in other ways.

Look for an MEP office that calculates and plans your heating load under the specification of the desired room temperatures together with the design of the heating system and hydraulics.

That should always be done and not just left to the heating installer. Costs 150€.

find an HVAC technician who is familiar with heat pumps and is willing to install according to an external plan (from the MEP office).

They don’t have to do much more; the heating load plan for the entire building (= important for the size of the heat pump) and the installation plan for the underfloor heating will then be available. Actually, every heating installer can do that.

I would also have point 1 done for a gas heating system. It’s money well spent.