ᐅ Heating system, something isn’t working correctly here. The hallway is always at 22°C (about 72°F).
Created on: 6 Oct 2022 08:21
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chewbacca123
Good morning everyone, I have a question and hope you can help me. We have been living in our newly built house with underfloor heating for three years now. Our heating system is a heat pump.
Basically, the radiators in our hallway are turned off, yet the temperature in the hallway is constantly around 22°C (72°F). Our bathroom, on the other hand, only reaches about 20.5°C (69°F) at the current supply temperature, so we always have to turn on the towel radiator; otherwise, it’s too cold in the bathroom in the morning, especially with a baby.
I just can’t understand why our hallway is so warm. When someone visits and opens the front door, the first comment is always: “It’s really hot in your hallway.” I agree, but what could be causing this? If energy is being wasted here, that would be a serious issue.
The valves embedded in the walls for the hallway heating are set to a minimum, and the manual controls for each area are also turned down to zero. Still, the hallway is very warm. It’s driving me crazy… Do you have any ideas?
Other rooms where we have the controls turned down to zero are pleasantly cool as expected.
Thanks.
Basically, the radiators in our hallway are turned off, yet the temperature in the hallway is constantly around 22°C (72°F). Our bathroom, on the other hand, only reaches about 20.5°C (69°F) at the current supply temperature, so we always have to turn on the towel radiator; otherwise, it’s too cold in the bathroom in the morning, especially with a baby.
I just can’t understand why our hallway is so warm. When someone visits and opens the front door, the first comment is always: “It’s really hot in your hallway.” I agree, but what could be causing this? If energy is being wasted here, that would be a serious issue.
The valves embedded in the walls for the hallway heating are set to a minimum, and the manual controls for each area are also turned down to zero. Still, the hallway is very warm. It’s driving me crazy… Do you have any ideas?
Other rooms where we have the controls turned down to zero are pleasantly cool as expected.
Thanks.
chewbacca1236 Oct 2022 11:12driver55 schrieb:
Hallway, except for the front door, is probably completely internal. What do the respective flow rates on the thermostatic radiator valves look like? And what are the exact temperatures? Entering the hallway with a jacket on feels different than being in the bathroom in just underwear. Yes, that’s right, the hallway in our house is in the center, spanning two floors.
I have set the flow rates so that the bathrooms and living area have full flow (3 liters), while the hallways and bedrooms get 0.5 liters.
To have exact temperatures, I still need to place a thermometer in each room. For example, the hallway (about 19 sqm (204 sq ft)) consistently stays around 21.9–22°C (71.4–71.6°F). Our large bathroom, 15 sqm (161 sq ft), only reaches about 20.5°C (68.9°F), because the towel radiator switches on in the morning. The smaller bathroom, 6 sqm (65 sq ft), is around 21°C (69.8°F).
The living area currently has 22.5°C (72.5°F) across 50 sqm (538 sq ft).
I would expect this to be the case in any house, but I somehow feel this is unique to ours. No matter whose house I visit, the hallway is never as stuffy and warm as ours :-(
When you come in from outside, it really feels like hitting a wall. I then ventilate the hallways, which lets out the well-heated air that would be better off in other rooms. To me, this just doesn’t make any sense at all.
Troubleshooting from outside is naturally quite difficult. All previous contributors have mentioned possible factors.
I find it hard to consider 22 degrees Celsius (72°F) as "hot." Here, temperatures of 24 or 25 degrees Celsius (75–77°F) are common and are not even close to being described as hot.
Could it be that the sensor in the hallway is poorly positioned? If the floor in the hallway doesn’t feel noticeably warm, then the underfloor heating probably isn’t the cause.
What is the orientation of the hallway? Are there panoramic windows facing the south side?
Please upload the ground floor plan… or does the hallway receive warm daylight from above?
Try following the advice from [USER=58010]@Matthias45.
I find it hard to consider 22 degrees Celsius (72°F) as "hot." Here, temperatures of 24 or 25 degrees Celsius (75–77°F) are common and are not even close to being described as hot.
Could it be that the sensor in the hallway is poorly positioned? If the floor in the hallway doesn’t feel noticeably warm, then the underfloor heating probably isn’t the cause.
What is the orientation of the hallway? Are there panoramic windows facing the south side?
Please upload the ground floor plan… or does the hallway receive warm daylight from above?
Try following the advice from [USER=58010]@Matthias45.
chewbacca1236 Oct 2022 11:34The hallway is on the ground floor, with our front door facing north. In the basement, the large terrace door is on the south side, so it gets sunlight during the day. However, the temperature stays around 22°C (72°F) overnight and in the early morning when we get up, so a little sun exposure shouldn’t be a problem. Is the sensor installed inside the controller? See photo.
chewbacca123 schrieb:
The hallway on the ground floor, our front door faces north. In the basement, the large patio door faces south, so the sun shines on it during the day. Nevertheless, the temperature stays around 22°C (72°F) overnight and in the early morning when we get up, so it shouldn’t be a problem if the sun shines on it a little. Is the sensor built into the controller? See photo Unfortunately, I only understand parts of your post 😉
Basically, the sensors in the controllers are just rough estimates. One is placed on the exterior wall and one on the interior wall. So my first tip is to buy a thermometer and measure everything yourself. Be sure to measure at the same height and not directly on exterior walls.
I didn’t understand the part about the hallways. Is there one hallway facing north and another facing south? If you don’t shade the south-facing patio window, that will result in a significant heat gain. Since modern houses are well insulated, that warmth will be retained for a long time. The sun heats up the floor, for example.
Do you have any ventilation system?
As a first step, as suggested before, check if all the connections are correct. Incorrect connections do happen. Also, take accurate measurements of the actual temperatures present.
chewbacca1236 Oct 2022 13:25face26 schrieb:
Unfortunately.We do have a ventilation system, but the hallway is not connected to it.
I think I might have phrased it a bit unclearly earlier. We have a house built into a hillside, with a ground floor and a basement level.
The hallway on the ground floor has only one window, frosted glass, facing north, where the front door is located.
The hallway in the basement has the patio door, which faces south. The sun does shine strongly on it in the afternoons, that’s true. But could that be the cause of the warmth in the hallway in October? Even at night?
Yes, it seems the only solution is to measure everything carefully.
M
Matthias456 Oct 2022 13:40chewbacca123 schrieb:
The hallway is on the ground floor, and our front door faces north. In the basement, the large terrace door faces south, so sunlight comes in during the day. Still, it stays at 22°C (72°F) overnight and in the early morning when we get up, so it can’t be a problem if the sun shines on it occasionally. Is the sensor built into the controller? See photo. Your controller has a bimetal switch installed. For testing, turn it to the maximum setting and check over two days whether it gets warmer in the hallway or the bathroom.
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