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
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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.
lin0r87 schrieb:
Hi,
I have the same heating system and consumption issues.
Can I use the values from my Lad9 CSV file?I have the same heating system. Consumption values are too high, and the bathroom doesn’t get warmer than 21°C (70°F) because the flow rate in the upper floor doesn’t exceed 1 liter per minute (0.26 gallons per minute). Personally, I think the heating system isn’t controlling the pump properly. When it heats, the pump only runs at 800 liters per minute (210 gallons per minute) but could run at 1,500 liters per minute (395 gallons per minute). As a result, nothing reaches the upper floor.Now, if I close the rooms more on the ground floor so that more heat reaches the upper floor, this happens: during defrosting, the system no longer reaches the minimum flow of 1,300 liters per minute (343 gallons per minute) and triggers a fault. Then everything shuts down.
chewbacca1239 Jan 2021 21:29Bookstar schrieb:
I agree, same heating system. The consumption values are too high, and the bathroom doesn’t get warmer than 21°C (70°F) because the flow rate upstairs doesn’t exceed 1 liter per minute (0.26 gallons per minute). Personally, I think the heating system doesn’t control the pump properly. When it’s heating, the pump only runs at 800 liters per minute (211 gallons per minute) but could run at 1500 liters per minute (396 gallons per minute). So, nothing reaches the upper floor.
If I reduce the flow to rooms on the ground floor to get more flow upstairs, this happens: during defrosting, the system no longer reaches the minimum required flow rate of 1300 liters per minute (343 gallons per minute) and triggers an error. Then everything shuts down. Where exactly can you read the flow rate? I can’t seem to see it on mine. There is a menu on the display, but it always shows “0.”
D
Deliverer10 Jan 2021 09:29Bookstar schrieb:
I agree, same heating system. The consumption values are too high, and the bathroom doesn’t get warmer than 21°C (70°F) because the flow rate upstairs doesn’t exceed 1 liter per minute (0.26 gallons per minute). Personally, I think the heating system isn’t controlling the pump properly. When it heats, the pump only runs at 800 liters per hour (3.5 gallons per minute) but could run at 1500 liters per hour (6.6 gallons per minute). So nothing reaches the upper floor. How do these values come about? Or are we talking about liters per hour? For me, the pump usually decides at 35 liters per minute (9.2 gallons per minute) that it’s sufficient. Below 26 liters per minute (6.9 gallons per minute) it complains because the defrosting doesn’t proceed fast enough. I find it hard to imagine how anyone could push 50 times that amount through the pipes...
D
Daniel-Sp10 Jan 2021 09:42Once liters per minute, once liters per hour
chewbacca12310 Jan 2021 12:18Bookstar schrieb:
I think under settings, efficiency pumpUnfortunately, I can’t find anything on my end. Strange.Similar topics