ᐅ Underfloor heating with an air-to-water heat pump. House gets too warm when the sun is shining.
Created on: 4 Dec 2019 14:18
C
chewbacca123
Hello everyone,
I have a general question.
We moved into our new build four months ago. The living area on the ground floor has three large floor-to-ceiling windows facing south. We have underfloor heating and an air-to-water heat pump.
It provides a really comfortable temperature inside the house, but we have a problem – whenever the sun is shining in winter, even if it’s -2°C (28°F) outside, the temperature suddenly rises to 24°C (75°F) in the living room. It gets uncomfortably warm in here, and the underfloor heating can’t be turned down quickly.
Should we assume that the large floor-to-ceiling windows are responsible for the heat gain? A photo of the south-facing side of the house is attached.
What would you do – always lower all the blinds as soon as sunlight is forecast? That seems quite annoying...
We have motorized blinds controlled by Somfy. Would you consider buying a sensor that automatically lowers the blinds at a certain temperature?
Thanks in advance for your replies.
I have a general question.
We moved into our new build four months ago. The living area on the ground floor has three large floor-to-ceiling windows facing south. We have underfloor heating and an air-to-water heat pump.
It provides a really comfortable temperature inside the house, but we have a problem – whenever the sun is shining in winter, even if it’s -2°C (28°F) outside, the temperature suddenly rises to 24°C (75°F) in the living room. It gets uncomfortably warm in here, and the underfloor heating can’t be turned down quickly.
Should we assume that the large floor-to-ceiling windows are responsible for the heat gain? A photo of the south-facing side of the house is attached.
What would you do – always lower all the blinds as soon as sunlight is forecast? That seems quite annoying...
We have motorized blinds controlled by Somfy. Would you consider buying a sensor that automatically lowers the blinds at a certain temperature?
Thanks in advance for your replies.
D
Daniel-Sp13 Dec 2019 19:56Exactly.
I just noticed that in the bedroom walk-in closet, one heating circuit has no flow while the other has maximum flow—actually twice as much as the heating circuit in the bathroom. Heating circuits in the hallway should never be restricted either, because then the hallway has to be heated by other rooms, such as the bathroom. This reduces the heating output available to those rooms, forcing you to raise the heating curve unnecessarily and wasting efficiency. This cannot be called a proper hydraulic or optimized thermal balancing.
I just noticed that in the bedroom walk-in closet, one heating circuit has no flow while the other has maximum flow—actually twice as much as the heating circuit in the bathroom. Heating circuits in the hallway should never be restricted either, because then the hallway has to be heated by other rooms, such as the bathroom. This reduces the heating output available to those rooms, forcing you to raise the heating curve unnecessarily and wasting efficiency. This cannot be called a proper hydraulic or optimized thermal balancing.
D
Daniel-Sp13 Dec 2019 20:02@chewbacca123
Could you please list, in a table by floor,
Room – m² (sq ft) – Number of heating circuits – Current flow rate
Please include rooms without heating circuits if there are any.
This will help me get an overview more easily.
Do you have an infrared thermometer?
Thanks in advance
Could you please list, in a table by floor,
Room – m² (sq ft) – Number of heating circuits – Current flow rate
Please include rooms without heating circuits if there are any.
This will help me get an overview more easily.
Do you have an infrared thermometer?
Thanks in advance
D
Daniel-Sp13 Dec 2019 20:04Now I understand the house.
D
Daniel-Sp13 Dec 2019 20:05The exact model designation of the heat pump would still be important to look up the nominal volume flow.
chewbacca12313 Dec 2019 20:21Daniel-Sp schrieb:
The exact model designation of the heat pump would still be important to look up the nominal volumetric flow rate.Hi, we have the Novelan Lad9. I can't find a more specific model name. I just ordered a thermometer like the one you recommended.
I’ll prepare the table with room - square meters - volumetric flow rate for you tomorrow or later today if I get the chance.
Regarding the current flow settings, is it even possible to optimize them, or is it a lost cause?
chewbacca12313 Dec 2019 20:22Daniel-Sp schrieb:
The exact model designation of the heat pump would still be important to look up the nominal volumetric flow rate.Hey, so we have the Novelan Lad9. I can’t find a more precise model number. I just ordered a thermometer like the one you recommended.
I’ll prepare the table for room – square meters – volumetric flow for you tomorrow or later today if I manage to finish it.
Regarding the current flow rate settings, is it possible to optimize them, or is it hopeless?
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