In recent months, we have assumed that we would install an electric towel radiator (HTHK) with a heating cartridge in both bathrooms. Yesterday, we spoke with our heating installer for the first time. He said that the locations we had planned are very unfavorable. In the smaller bathroom, he anticipated problems with the towel radiator rusting. Essentially, he saw issues with having an electrical outlet in the splash zone. He had no concerns about towel radiators connected to our ground source heat pump, as the supply temperatures are relatively low. He mentioned that in summer, the supply temperature would be quite low, for example around 35°C (95°F), and higher in winter, for example around 45°C (113°F).
The entire house has underfloor heating.
Bathroom 1:
Towel radiator between the shower exit and bathtub
Bathroom 2:
Towel radiator opposite the shower
Now for my questions:
1. Can towel radiators be mounted upside down?
2. Is it possible to plug towel radiators (with appropriate wall penetration) into an electrical outlet in an adjacent room (utility room)?
3. Do towel radiators function properly at low supply temperatures?
4. Can towel radiators rust?
5. Are towel radiators necessary? The heating output from the underfloor heating surface is sufficient for both bathrooms. There is often talk about transition periods, but doesn’t my bathroom always maintain 23°C (73°F) when I set it to that?
6. Do towels dry adequately without a heating function?
The entire house has underfloor heating.
Bathroom 1:
Towel radiator between the shower exit and bathtub
Bathroom 2:
Towel radiator opposite the shower
Now for my questions:
1. Can towel radiators be mounted upside down?
2. Is it possible to plug towel radiators (with appropriate wall penetration) into an electrical outlet in an adjacent room (utility room)?
3. Do towel radiators function properly at low supply temperatures?
4. Can towel radiators rust?
5. Are towel radiators necessary? The heating output from the underfloor heating surface is sufficient for both bathrooms. There is often talk about transition periods, but doesn’t my bathroom always maintain 23°C (73°F) when I set it to that?
6. Do towels dry adequately without a heating function?
D
DragonyxXL26 Jan 2017 11:11ypg schrieb:
How many square meters are the bathrooms?You always forget something...Bathroom 1: 12m² (129 sq ft)
Bathroom 2: 7.6m² (82 sq ft)
DragonyxXL schrieb:
You always forget something...
Bathroom 1: 12m² (129 sq ft)
Bathroom 2: 7.6m² (82 sq ft)There should be no issues: the floor area in both rooms will be sufficiently large!
DragonyxXL schrieb:
No problem, he said, with underfloor heating circuits that are supplied by our ground source heat pump with accordingly low flow temperature. He mentioned that in summer it is quite low, for example 35°C (95°F), and in winter higher, for example 45°C (113°F).In my case, the flow temperatures in the underfloor heating system and thus also in the underfloor heating circuits range between 29 and 31°C (84 and 88°F), depending on how far below 0°C (32°F) the thermometer was.
Where does your heating system get 45°C (113°F) from? Is there a separate circuit for the underfloor heating circuits?
D
DragonyxXL26 Jan 2017 14:03Musketier schrieb:
So far, I have floor heating and, therefore, supply temperatures in the high-temperature heating circuit (HTHC) between 29 and 31°C (84 and 88°F), depending on how far below zero the thermometer was. Where does your heating system get 45°C (113°F) from? Is there a separate circuit for the HTHC? That was a very general statement from the installer. I still have no idea what temperature will actually be delivered since the heating system has not been installed yet. What would be the purpose of a separate circuit?
K
Knallkörper26 Jan 2017 14:18I would install the radiators and integrate them into the underfloor heating circuit. A heated towel rail is simply too practical as a towel holder to do without. You can manage with the lower temperature. In our old house, the heated towel rail is connected to the return flow of the underfloor heating system (!) and of course it doesn't get very warm, but it does provide some heat, and I also like it when the towels are slightly warmed.
DragonyxXL schrieb:
What would be the purpose of an additional circuit?It would have to be similar to mixing underfloor heating and regular radiators. Whether that would even work with a heat pump or only with gas, I’m not sure.
For us, towel radiators were necessary because of the size of the bathroom, and we connected them to the heat pump as well. Since I set the heat pump according to the supply temperature after the bathroom, the radiators always run at level 5. However, due to the low supply temperatures, you hardly notice that. I can’t say if the towels would be warmer hanging there because of this.
I find the towel radiator quite practical in the ground floor bathroom. That's where we hang the wet muddy or winter clothes and shoes of our little one to dry first.
What I find fascinating is how low the heating temperatures need to be in a new build with underfloor heating. Our heating installer made an error when refilling the refrigerant during the last maintenance in early January, so for over 1.5 weeks our heating could only supply up to 26°C (79°F) supply temperature despite outside temperatures ranging from -5 to -15°C (23 to 5°F). Even that was enough to keep the indoor temperature at 20-21°C (68-70°F). And our house is just KfW70 standard.
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