Hello everyone,
I need your help. We have the problem that we can’t get our bathroom properly warm. Due to the small underfloor heating area in the bathroom, three additional wall heaters were installed. Still, we can’t get the temperature above about 21 degrees Celsius (70°F). The calculation was based on 24 degrees Celsius (75°F). I have already switched off the EER and set the flow rate to the maximum (3 liters per minute). All other rooms easily reach their target temperature and are sometimes already at the minimum flow rate.
Do you have any other ideas on what could be done?
Thank you very much and best regards
I need your help. We have the problem that we can’t get our bathroom properly warm. Due to the small underfloor heating area in the bathroom, three additional wall heaters were installed. Still, we can’t get the temperature above about 21 degrees Celsius (70°F). The calculation was based on 24 degrees Celsius (75°F). I have already switched off the EER and set the flow rate to the maximum (3 liters per minute). All other rooms easily reach their target temperature and are sometimes already at the minimum flow rate.
Do you have any other ideas on what could be done?
Thank you very much and best regards
E
EdelStoff11 Dec 2021 15:55face26 schrieb:
However, that’s not how the design was calculated.
Well, it really depends on the circumstances. The energy saving regulation (Energieeinsparverordnung) is not the same as KfW40.
I also follow the energy saving regulation, with 0.35 at a 21.5m (71 feet) room target. And that’s not driving me into financial trouble.
I also have offsets and recesses, plus a basement within the thermal envelope that I’m not currently heating, and so on. Yes, 21.5m (71 feet) in the bathroom is also achievable with 0.35. I just haven’t tried lowering the heating curve yet.
@TomTom @driver55
Currently, I have the flow rates set back to the installer’s settings.
@edit:
I’ve attached another picture from the bathroom.
For a bathroom, I consider underfloor heating to be a "bad joke." It can never be 10 cm (4 inches) VLA. Of course, you have to run it with a supply temperature above 30 degrees Celsius (86°F).
I can barely see any flow rates; I’ll have to take a closer look later.
I’ll upload a picture of our underfloor heating in the bathroom later for comparison.
I can barely see any flow rates; I’ll have to take a closer look later.
I’ll upload a picture of our underfloor heating in the bathroom later for comparison.
I guess the bathroom also has an exterior wall? On the floor, maybe it should have been 5cm (2 inches), since the area is quite limited.
driver55 schrieb:Well, it’s actually around 10-12cm (4-5 inches). You can quite clearly see it based on the grid. But that doesn’t change the fact that it’s too little for a bathroom. The heat output is simply too low.
That can never be 10 cm (4 inches) VLA.
E
EdelStoff11 Dec 2021 17:08Yes, the bathroom has two exterior walls. There is also some underfloor heating at the front and back. Unfortunately, I couldn’t find a picture quickly. The grid is 10cm (4 inches), so I think the VLA is approximately correct.
EdelStoff schrieb:
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 spacing is 10cm (4 inches), so I think the VLA is roughly correct.Exactly, just approximately. You could easily have installed twice the length, or needed to, and then you wouldn’t be in this situation now. 😉
Here is a picture from our “mini bathroom” (8.7 m² (94 sq ft) floor area, according to DIN standard 7 m² (75 sq ft)) from 2009.
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