Company Lüumel, trench collector

- which reads rather frightening...

Since the majority of this approx. 100m² upscale area only hit the lawn and was then evenly lifted, it sounds worse than it actually was. Since we only moved in in autumn 2014, nothing else had been planted or flower beds laid out yet.
Only the path behind the garage, where our garbage bins stand, was unfortunately affected. The stones were pushed apart first in one direction and then in the other due to the movement, and the foundation for the curbstones was thus destroyed. With about 1-2 cm stone gaps, the path is definitely permeable to water this year.

I don’t think we need to discuss my case any further. I actually just wanted to point out that a watertight superstructure should not be done and what consequences could arise from it.

On the website I haven’t read anything specific about the drainage collector regarding which heat pump it is. Only that Lüumel specializes in the DV. Why should they use a different one.

Principle of operation

The heat pump extracts the heat from the brine mixture of the earth absorber via the refrigerant and charges the combined-layer storage tank, in which heating and domestic hot water are generated.

Is a flat plate collector that is frozen like this incorrectly designed (hopefully it works with more refrigerant). After all, through the direct evaporator principle, it might be possible to achieve even better COP than with other technology.

Now my initial questions have led me to a completely different but quite important topic, electricity tariffs.

Hmm, actually I wanted to take advantage of the BAFA subsidy. Now I have learned that I necessarily need a second electricity meter for that....

The colleague of Lüumel. Heat meters and electricity meters are needed to prove efficiency.. No?

Who says that?

The BAFA states in its conditions that electricity and heat quantities must be measured separately. That’s how I read it a few days ago.

Luckily my heating does - but they are all analog meters anyway. I had overlooked the BAFA thing and instead thought of the grid operator. A second electricity meter wouldn't cost much either - 50-100 euros plus installation?