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
EdelStoff8 Dec 2021 21:26I appreciate any help.
Specifically, three additional wall heating elements of 2 sqm (21.5 sq ft) each have been installed. They have a flow rate of 1 liter per minute (0.26 gallons per minute). I changed the installation distance to 10 cm (4 inches). I just checked the design. The bathroom underfloor heating is 110 meters (360 feet) away from the wall heating elements; unfortunately, I don’t have the exact length for those. I read the flow rate at the manifold. The hot water storage tank adjacent to the bathroom is currently at 22 degrees Celsius (72°F); otherwise, there are no other rooms, only exterior walls.
This is roughly what it looks like, except the pipes for the wall heating are thinner and have a separate circuit:
Specifically, three additional wall heating elements of 2 sqm (21.5 sq ft) each have been installed. They have a flow rate of 1 liter per minute (0.26 gallons per minute). I changed the installation distance to 10 cm (4 inches). I just checked the design. The bathroom underfloor heating is 110 meters (360 feet) away from the wall heating elements; unfortunately, I don’t have the exact length for those. I read the flow rate at the manifold. The hot water storage tank adjacent to the bathroom is currently at 22 degrees Celsius (72°F); otherwise, there are no other rooms, only exterior walls.
This is roughly what it looks like, except the pipes for the wall heating are thinner and have a separate circuit:
What? Three separate circuits for the water heaters in the bathroom? I think that would be rather impractical. That would mean three short circuits.
Have you already tried increasing the flow rate of the water heaters?
As mentioned, the bathroom is usually the problem area. There is typically no piping under the shower or bathtub, but there is a lot of exterior wall area plus the roof.
What’s strange is that you have already considered the water heaters and apparently designed them for 24 degrees Celsius (75°F) as per calculation.
Are you running the temperatures (flow temperature) as assumed in the design calculation?
Have you already tried increasing the flow rate of the water heaters?
As mentioned, the bathroom is usually the problem area. There is typically no piping under the shower or bathtub, but there is a lot of exterior wall area plus the roof.
What’s strange is that you have already considered the water heaters and apparently designed them for 24 degrees Celsius (75°F) as per calculation.
Are you running the temperatures (flow temperature) as assumed in the design calculation?
E
EdelStoff8 Dec 2021 22:07No, all three water heaters are connected to the same circuit.
I can set the flow rate of the water heaters to maximum and monitor it.
In the calculation, I don’t find any heating curve or similar, only the maximum design temperature, which is 35°C (95°F) at an outdoor temperature of -11.6°C (11°F).
I can set the flow rate of the water heaters to maximum and monitor it.
In the calculation, I don’t find any heating curve or similar, only the maximum design temperature, which is 35°C (95°F) at an outdoor temperature of -11.6°C (11°F).
Hmm. So 24 degrees Celsius (75°F) in the bathroom is generally quite high. I wonder if you can actually achieve that.
Keep in mind that you need to wait 24 hours before you notice if it makes any difference.
If I were you, I would also start troubleshooting.
But in the end, it might turn out that it’s easier to just add an auxiliary heater in the bathroom. A small fan heater with a timer and/or remote control.
Usually, this is better than having to raise the whole system unnecessarily just for the bathroom.
Keep in mind that you need to wait 24 hours before you notice if it makes any difference.
If I were you, I would also start troubleshooting.
But in the end, it might turn out that it’s easier to just add an auxiliary heater in the bathroom. A small fan heater with a timer and/or remote control.
Usually, this is better than having to raise the whole system unnecessarily just for the bathroom.
I mean, I could also suggest installing a infrared heater, either freestanding or wall-mounted. But it’s not really the best solution. We have about 10 square meters (approximately 107 square feet), of which 7 (the numbers are approximate) are heated with underfloor heating, without any special requests regarding spacing. And it’s comfortably warm whenever we want it to be. Adding heating loops on the walls should also be enough to really warm up the bathroom. The flow is open… 😕
Similar topics