Hello,
we are currently struggling with our heating system. It is warm everywhere in the house—both on the ground floor and in the heated basement room—around 21-22°C (70-72°F). However, the temperature in all rooms in the attic is noticeably lower, usually about 2°C (3.6°F) difference. This is problematic because a) it is too cold and b) it also affects the bathroom.
We have already tried various measures. We adjusted the heating curve, the manufacturer’s service performed a firmware update, and the hydraulic balancing was done again... but the problem remains the same. The attic stays consistently about 2°C (3.6°F) cooler than the other floors. The heating technician said this is normal because of the many windows and that it always tends to be cooler in the attic. He advised us to simply increase the supply water temperature. But that can’t be the solution, right? Although this raises the temperature in the attic, we then have to lower the temperature on the ground floor because otherwise it becomes too hot. The 2°C (3.6°F) difference always stays the same. We have solid ceilings and walls, underfloor heating everywhere, and the room thermostats turned up fully.
Is this really normal, or is the heating technician just trying to sell us that because he has no other ideas? What is your experience? Do you also have such temperature differences?
we are currently struggling with our heating system. It is warm everywhere in the house—both on the ground floor and in the heated basement room—around 21-22°C (70-72°F). However, the temperature in all rooms in the attic is noticeably lower, usually about 2°C (3.6°F) difference. This is problematic because a) it is too cold and b) it also affects the bathroom.
We have already tried various measures. We adjusted the heating curve, the manufacturer’s service performed a firmware update, and the hydraulic balancing was done again... but the problem remains the same. The attic stays consistently about 2°C (3.6°F) cooler than the other floors. The heating technician said this is normal because of the many windows and that it always tends to be cooler in the attic. He advised us to simply increase the supply water temperature. But that can’t be the solution, right? Although this raises the temperature in the attic, we then have to lower the temperature on the ground floor because otherwise it becomes too hot. The 2°C (3.6°F) difference always stays the same. We have solid ceilings and walls, underfloor heating everywhere, and the room thermostats turned up fully.
Is this really normal, or is the heating technician just trying to sell us that because he has no other ideas? What is your experience? Do you also have such temperature differences?
Yes, the doors were already closed. There are slight variations of 0.2–0.4 degrees. I can explain this by the different floor coverings.
I have not yet tried turning off the outdoor temperature control. I will try that. What has already been tried: increasing the mixing pump from level 1 to level 6 (maximum) → no effect.
I have not yet tried turning off the outdoor temperature control. I will try that. What has already been tried: increasing the mixing pump from level 1 to level 6 (maximum) → no effect.
Why generalize? The heating engineer was here yesterday and turned off each valve cap and adjusted the flow rates. And yes, every valve in each room...
By the way, I just checked the roof insulation... we have a U-value of 0.14, while the energy savings regulation requires 0.20. So poor insulation cannot be the cause.
By the way, I just checked the roof insulation... we have a U-value of 0.14, while the energy savings regulation requires 0.20. So poor insulation cannot be the cause.
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Peanuts7423 Mar 2017 12:23It is also strange that the floor temperature remains the same regardless of the supply and return temperatures. Possibly laminate flooring with an unfavorable insulating impact sound insulation?
No, unfortunately not.
The floor coverings in the attic (where the problem occurs) are carpet (fully glued down, suitable for underfloor heating) and tiles (bathroom).
In the bathroom with tiles, the temperature is 21.2 degrees Celsius (70.2°F), and in rooms with carpet, it is 20.9 degrees Celsius (69.6°F).
No changes occur with higher supply temperatures.
The floor coverings in the attic (where the problem occurs) are carpet (fully glued down, suitable for underfloor heating) and tiles (bathroom).
In the bathroom with tiles, the temperature is 21.2 degrees Celsius (70.2°F), and in rooms with carpet, it is 20.9 degrees Celsius (69.6°F).
No changes occur with higher supply temperatures.
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