Cost Breakdown Heat Pump - Heat Pump with Ground Collectors

Hot water is practically negligible - if the drilling was calculated correctly, the Seine normally does not even freeze.

We drill 140m deep and the bottom will probably never freeze... unless Winter 78 comes again

By the way, I will also not use any heat pump electricity...

The costs for the additional connection eat up the savings from the night tariff again. The calculation is the thing... I calculated a heating load of 4.3 kW, the U-value gives 4.6 kW (35 kWh/m²a heating demand at 190 m² - just as a reference). The planner who created the energy saving regulation assumes a 6 kW heat pump. One heating engineer offered 6 kW, another 7.6 kW, and the one we decided on works with Vaillant and offered the VWS82/3 with a 6 kW drilling in the offer... PS: We once tried to request a heat load calculation from a TGA, but we were told that it would not make sense for a single-family house...

You can have an HLB done on the internet for a relatively small amount of money. For the low HL you expect, I would take a smaller heat pump, 8 kW is oversized and just cycles unnecessarily.

Yes, I don’t understand either - usually quite "active on the internet" with everything else, but you can’t find an HLB online?

Doing it yourself, you can forget it...

Do it and then also plan the drilling accordingly.

The difference between the Energy Saving Ordinance calculation and the real HLB was 1kW more... just as a reference.

The Energy Saving Ordinance does not yet contain any power calculation (kW), only work (kWh/m²a)... Why didn't you actually choose the Nibe F1255? It is better in every respect if you look at the datasheets – quieter, modulated, better COP and even better sCOP, costs less, more hot water. ... with us, I have probably still decided on the Vaillant with 5.3 kW but only because the heating installer is not familiar with Nibe.

Ours had a calculation of the heating load - but not according to DIN.

I simply like Vaillant - also as a German brand, good service, few known problems. And my heating technician is also a Vaillant partner, which was just a coincidence.

Modulating sounds great, but I believe it hardly makes a difference with a suitable and well-adjusted system.

And why more hot water? As I said, I would never buy that in combinations... that way we save even more.