ᐅ Is an additional heater recommended in a bathroom with underfloor heating?
Created on: 30 Jul 2013 13:22
D
Doc.Schnaggls
Hello everyone,
We are currently planning our new house and have reached the point where we need to decide on an additional fast heating option for our bathroom, one that responds more quickly than the rather slow underfloor heating.
We are considering either a wall-mounted fan heater or an electric towel warmer. We understand that both options have their advantages and disadvantages, but this supplementary heater will only be used during transitional seasons when the underfloor heating is not yet running or has already been turned off.
The bathroom has a floor area of about 18 square meters (living area around 16 square meters (172 square feet) due to the sloping ceiling). The built-in heating system will be an air-to-water heat pump with a controlled ventilation system.
Personally, I’m leaning toward the towel warmer, mostly for aesthetic reasons.
What would you recommend?
Best regards,
Dirk
We are currently planning our new house and have reached the point where we need to decide on an additional fast heating option for our bathroom, one that responds more quickly than the rather slow underfloor heating.
We are considering either a wall-mounted fan heater or an electric towel warmer. We understand that both options have their advantages and disadvantages, but this supplementary heater will only be used during transitional seasons when the underfloor heating is not yet running or has already been turned off.
The bathroom has a floor area of about 18 square meters (living area around 16 square meters (172 square feet) due to the sloping ceiling). The built-in heating system will be an air-to-water heat pump with a controlled ventilation system.
Personally, I’m leaning toward the towel warmer, mostly for aesthetic reasons.
What would you recommend?
Best regards,
Dirk
Yes, Lex is right – let’s take our bathroom on the ground floor as an example:
Heat loss at -12°C (10°F) [W]: 140
Design temperature [°C]: 24
Heated area [m² (sq ft)]: 3.7
Theoretically required W/m²: 37.84
Pipe spacing at 30°/26°C (86°F/79°F) [cm (inches)]: 5 cm (2 inches) → results in 13 W/m² (cannot go higher)
Notes: Heated area → 4.7 m² (50.6 sq ft) minus shower
You should consider that 30/26°C (86/79°F) is extremely low for the calculation, and -12°C (10°F) occurs roughly once every 10 years. Furthermore, the 13 W assumes there is carpet on top and air cannot circulate freely.
In this case, the area simply isn’t sufficient – even with 5 cm (2 inches) pipe spacing.
Heat loss at -12°C (10°F) [W]: 140
Design temperature [°C]: 24
Heated area [m² (sq ft)]: 3.7
Theoretically required W/m²: 37.84
Pipe spacing at 30°/26°C (86°F/79°F) [cm (inches)]: 5 cm (2 inches) → results in 13 W/m² (cannot go higher)
Notes: Heated area → 4.7 m² (50.6 sq ft) minus shower
You should consider that 30/26°C (86/79°F) is extremely low for the calculation, and -12°C (10°F) occurs roughly once every 10 years. Furthermore, the 13 W assumes there is carpet on top and air cannot circulate freely.
In this case, the area simply isn’t sufficient – even with 5 cm (2 inches) pipe spacing.
Lexmaul79 schrieb:
You, Yvonne, probably have gas, right?Yes, we do.
Am I off topic at the moment? Is this about heat pumps? Would there be a difference then?
S
Sebastian7924 May 2015 11:46Yes, this thread is about a heat pump – and there you have a very big difference.
Lexmaul79 schrieb:
Yes, this thread is about a heat pump – so there is a significant difference there I just read the title
Supplemental heating in the bathroom with underfloor heating
and I don’t read every single post again in topics that have been running for 2 years
So, what exactly is the difference now?
Since with heat pumps the goal is to keep the supply temperatures as low as possible, because each additional degree increases costs by about 5%. With gas, this is not as critical. Therefore, I think with gas heating, you will never face the problem of not having enough heating surface.
Now you have the choice between wall heating, electric supplementary heating, towel radiators, etc.
Now you have the choice between wall heating, electric supplementary heating, towel radiators, etc.
... but that doesn’t change the fact that gas heating users don’t constantly adjust or manipulate their flow temperature. The flow temperature is generally set higher anyway, who really knows….
The towel radiator is basically not intended as a supplementary heater, regardless of which heating system you have.
I would rather recommend infrared heating in that case, as it is supposed to provide a pleasant radiant warmth.
The towel radiator is basically not intended as a supplementary heater, regardless of which heating system you have.
I would rather recommend infrared heating in that case, as it is supposed to provide a pleasant radiant warmth.
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