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
C
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.
chewbacca1237 Oct 2022 11:41By "walking into a wall," I mean entering from outside, from the street. Yes, our hallway is connected by a staircase between the ground floor and the basement.
Next week, our plumber will come by to take a look since he needs to service some equipment anyway. I can’t explain the buildup of pressure during the heat at night — it makes sense during the day, but not at night.
I’m curious to see what I find; I’ll start measuring everywhere and then we’ll see what to do next.
Thank you all for your contributions.
Next week, our plumber will come by to take a look since he needs to service some equipment anyway. I can’t explain the buildup of pressure during the heat at night — it makes sense during the day, but not at night.
I’m curious to see what I find; I’ll start measuring everywhere and then we’ll see what to do next.
Thank you all for your contributions.
A
Alessandro7 Oct 2022 12:06try something simple first:
Check at the heating circuit distributor if the controller in the hallway really closes the corresponding valve at the heating circuit distributor (HCD).
You have sight glasses with a flow indicator at the HCD.
If the controller is set to MIN or OFF, the flow indicator on the hallway heating circuit should show "0".
Check at the heating circuit distributor if the controller in the hallway really closes the corresponding valve at the heating circuit distributor (HCD).
You have sight glasses with a flow indicator at the HCD.
If the controller is set to MIN or OFF, the flow indicator on the hallway heating circuit should show "0".
A
Alessandro7 Oct 2022 12:20Turn your heating circuit pump down by one level.
3 liters per minute in the bathroom and living area is way too much!
You probably have a very small temperature difference, so the heat cannot be transferred effectively into the room.
Where the "cold" return flow from the living area should normally come back, "warm" return flow is rushing through the hallway instead!
3 liters per minute in the bathroom and living area is way too much!
You probably have a very small temperature difference, so the heat cannot be transferred effectively into the room.
Where the "cold" return flow from the living area should normally come back, "warm" return flow is rushing through the hallway instead!
D
Daniel-Sp7 Oct 2022 14:21Hello,
before simply reducing the flow rate, you should first measure the actual temperature of the return flow at the heating circuit (HC) manifold.
@chewbacca123
You bought an IR thermometer back then, right? Just measure the return pipe during the heating cycle.
Always keep an eye on the total flow while turning it down. You have a large heat pump that requires a corresponding flow rate. If you reduce it too much, the heat pump won’t be able to release the heat and will go into error mode.
When the heating technician has been there, check if they reopened the bypass valve.
I’m curious whether the labeling on the HC manifold got mixed up.
Greetings from Hamburg
before simply reducing the flow rate, you should first measure the actual temperature of the return flow at the heating circuit (HC) manifold.
@chewbacca123
You bought an IR thermometer back then, right? Just measure the return pipe during the heating cycle.
Always keep an eye on the total flow while turning it down. You have a large heat pump that requires a corresponding flow rate. If you reduce it too much, the heat pump won’t be able to release the heat and will go into error mode.
When the heating technician has been there, check if they reopened the bypass valve.
I’m curious whether the labeling on the HC manifold got mixed up.
Greetings from Hamburg
D
Daniel-Sp7 Oct 2022 17:54Alessandro schrieb:
Try setting your heating circuit pump one level lower.
3 liters per minute in the bathroom and living area is way too much!
You probably have a very small temperature difference, so the heat cannot be optimally transferred to the room.
Where "cold" return flow from the living area should actually be coming back, you have "warm" return flow rushing through the hallway! Hi Alessandro,
I’ve been thinking about this for a while.
But it’s not only about the temperature difference; the volume of water circulated also determines the heat output. The critical factor for heat transfer from the underfloor heating to the room is actually the temperature difference between the floor surface and the room temperature. How the floor surface temperature is achieved shouldn’t really matter. Or am I missing something?
Could you share some references for your claim? I’m genuinely interested.
Best regards
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