Wall heaters do not reach the desired temperature

2021-12-11 08:23:53

@TE: please show pictures of the underfloor heating installation and the HKV (all flow rates).

2021-12-11 15:55:17

But that's not how the deflection was calculated.

Well, it also depends somewhat on the circumstances. The Energy Saving Ordinance is not the same as KfW40.
I also have the Energy Saving Ordinance and 0.35 with a 21.5 room target. And that doesn't ruin me either.
But I also have a basement with recesses and projections in the thermal envelope that I am currently not heating, etc.

Yes, we also manage 21.5 in the bathroom with 0.35. I haven't yet tried if I could lower the heating curve as well.

Currently, I have the flow rates set back to the settings from the heating technician.

@edit:
Attached another picture of the bathroom.

2021-12-11 16:37:07

For a bathroom, I consider underfloor heating a "bad joke." That's never 10 cm VLA. Of course, you have to run it with >30 degrees supply temperature.

I can hardly see the flow rates, I'll have to take a closer look later.
I will upload a picture of our underfloor heating in the bathroom later - for comparison.

2021-12-11 17:02:36

I guess the bathroom also has an exterior wall? On the floor, maybe they should have gone down to 5cm, the area is really quite small after all.

Those are never 10 cm VLA.

Well, there are indeed 10-12 cm. You can see that quite well from the grid. But that doesn't change the fact that it's too little for a bathroom. The heat output is simply too low.

2021-12-11 17:08:35

Yes, the bathroom has two exterior walls. There is also a section of underfloor heating at the front and back. Unfortunately, I couldn't quickly find a picture. The grid is 10cm, so I think the VLA is approximately correct.

2021-12-11 18:26:56

Yes, the bathroom has two exterior walls. There is also a section of underfloor heating at the front and back. Unfortunately, I couldn’t find a picture quickly. The grid is 10cm, so I think the VLA is about right.

Exactly, just approximately.
You could have easily installed double the length / had to / should have, then you wouldn’t be here now.;)

Here from our "mini bathroom" (8.7 m² area, according to DIN 7 m²) from 2009.

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Wall heaters do not reach the desired temperature

driver55

EdelStoff

driver55

Mycraft

EdelStoff

driver55