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.
chewbacca123 schrieb:
I’ve now turned it from four to five, slowly getting closerCould you share a picture of yours? Mine only has a scale up to 500 mBar (7.25 psi) and I’ve tried both extremes, but nothing changed.
chewbacca12327 Dec 2019 15:30Daniel-Sp schrieb:
Then please send a new DTA, let's see if anything changes. Will be sent by email shortly
chewbacca12327 Dec 2019 17:36M4rvin schrieb:
Could you share a picture of yours?
Mine only has a scale up to 500 mBar (7.25 psi), and I have tried both extremes, but nothing changed. See attached
D
Daniel-Sp27 Dec 2019 19:05so!!!!!!!!
This morning, chewbacca123 closed the bypass valve from setting 4 to 5, and
TADA, the return temperature now only rises after about 6 minutes. This means more heat is reaching the screed. The heat pump will now operate more efficiently. The heating curve needs to be adjusted; I would initially try 27-22-0. Otherwise, it will get too warm inside the house.
Here is the proof
Maybe more improvement is possible if the bypass valve is closed from 5 to 6 or even completely closed.
Here again for comparison, the previous state:
The heating cycles are also longer in the first trend:
Now, let’s be brave and move to the next step!
It remains interesting to see how the bathroom temperatures develop. So far, the flow rate has increased from initially 1.5 liters per minute to 2.9 liters per minute.
Looking forward to the results...
This morning, chewbacca123 closed the bypass valve from setting 4 to 5, and
TADA, the return temperature now only rises after about 6 minutes. This means more heat is reaching the screed. The heat pump will now operate more efficiently. The heating curve needs to be adjusted; I would initially try 27-22-0. Otherwise, it will get too warm inside the house.
Here is the proof
Maybe more improvement is possible if the bypass valve is closed from 5 to 6 or even completely closed.
Here again for comparison, the previous state:
The heating cycles are also longer in the first trend:
Now, let’s be brave and move to the next step!
It remains interesting to see how the bathroom temperatures develop. So far, the flow rate has increased from initially 1.5 liters per minute to 2.9 liters per minute.
Looking forward to the results...