ᐅ Is a Separate Meter and Electricity Tariff for an Air-to-Water Heat Pump Beneficial?

I would say this is not really ideal, but still quite standard. If it had been possible to influence this and halve the spacing, perhaps an additional 10% in energy savings could have been achieved.

Smaller heat pump. In our case, this makes the difference between a 400V and a 230V device with the 7kW heat pump. Before anyone points out that this is still much too large: I KNOW! 😉 Detailed discussion from here: #86

Regarding this topic, I never really questioned it because I already have photovoltaic panels on the roof and want to use them for the heat pump as well. To my knowledge, this only works simply with a single meter.

Just for fun, I ran the comparison calculators. Here, I only save 2 cents per kWh in the heat pump tariff. Either I’m not using the calculators correctly, I’m a bit confused, or it simply would never be worthwhile here. Apparently, everything was planned correctly.

However, I will ask the electrician to install a proforma meter for the heat pump again, to make the calculations easier.

_Ugeen_ schrieb:

I would say the pipes were installed very close together.

This is the worst/most basic standard you can choose. 15cm (6 inches) is already borderline.

This is a tight installation – 5cm (2 inches)! But it also means triple the amount of piping.

Hmm, then I’m surprised that our construction supervisor approved everything. I considered him relatively competent, as he also identified several areas where the builder had to make corrections.

_Ugeen_ schrieb:

Hmm, then I’m surprised that our construction supervisor approved the whole thing.

No one is saying that it doesn’t work or is incorrect. In that respect, he can approve it without any concerns.
But better is always the enemy of good.

It is questionable whether it actually saves anything. The heating cost savings (10% was mentioned, which for us would be 40€ per year) have to be weighed against the investment costs for piping and labor, and the heating pump doesn’t circulate the fluid through the pipes for free either.