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.
T_im_Norden schrieb:
Am I understanding this correctly:
Power heating minimum 60%?
Does that mean the minimum heating output is 60%?
If so, reduce it to around 20% or so. With a modulating pump, it actually has to be set to auto.
Unfortunately, the operating times are also quite poor. Do you have any data on hand?
Joedreck schrieb:
Did I read correctly that the heating element is still active? The last technician insisted on not turning it off completely. He said that could damage the system. This winter, the heating element ran for 3 hours; the 97 hours before that are from the initial commissioning.
Bookstar schrieb:
The last installer insisted on not turning it off completely. He said that could damage the system. This winter, the heating element ran for 3 hours, the 97 hours before that are from the initial startup.Ah, okay. I don’t really agree with that, but the 3 hours alone obviously don’t explain much. What heat source did you say again? Air?
A
Alessandro12 Jan 2021 11:52In post #686, your temperature differential is only 2.8K.
Can you adjust that somewhere?
A return temperature of 26.6°C (80°F) at an outdoor temperature of -3°C (27°F) also seems very low to me.
Can you adjust that somewhere?
A return temperature of 26.6°C (80°F) at an outdoor temperature of -3°C (27°F) also seems very low to me.