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.
Smialbuddler schrieb:
How does this align with legionella prevention? I know (from the context of gas heating) the guideline of 60°C (140°F) in the storage tank, which is still easily found online. Are there other methods to prevent the growth of legionella?Ensure continuous flow or run a legionella control program, which heats the system once a week.
chewbacca1236 Dec 2019 20:13Bookstar schrieb:
That’s possible, but the heating engineer can’t just skip the complete initial operation and commissioning. You probably paid for that as well, right?No, he still wants to do it, but he’s so booked up that he never has time. It’s really frustrating. I spoke with our construction company again, and they said he will get in touch next week. Everything goes through our construction company, which is very reliable, but dealing with the plumbing is a nightmare.chewbacca1237 Dec 2019 16:46Bookstar schrieb:
My heat pump has been running for 5 hours:
Supply temperature: 23.7°C (74.7°F)
Return temperature: 24.3°C (75.7°F)
Target return temperature: 26.2°C (79.2°F)
Outdoor temperature: -3°C (27°F)Hey, I’ve analyzed the data now, take a look and let me know what you think:
D
Daniel-Sp7 Dec 2019 16:58Wow,
after just 4 months, nearly 4000 compressor starts. You should urgently optimize the heat pump settings, otherwise you’ll be buying a new heat pump in a few years!
Disassemble the ERR, open all heating circuits completely at first, close the bypass valve completely, set the domestic hot water hysteresis to 6°C (11°F), set the domestic hot water target temperature to 48°C (118°F), heating curve 28/22/0. And no, your installer won’t provide you with a properly adjusted system.
Regards, Daniel
after just 4 months, nearly 4000 compressor starts. You should urgently optimize the heat pump settings, otherwise you’ll be buying a new heat pump in a few years!
Disassemble the ERR, open all heating circuits completely at first, close the bypass valve completely, set the domestic hot water hysteresis to 6°C (11°F), set the domestic hot water target temperature to 48°C (118°F), heating curve 28/22/0. And no, your installer won’t provide you with a properly adjusted system.
Regards, Daniel
chewbacca1237 Dec 2019 17:07Thank you for your response. Our installer is coming on Monday, and I will discuss this with him then!
chewbacca1237 Dec 2019 17:11Oh, I should probably mention that our heating system has been installed and turned on since April, during the screed drying process. So it has been in use for more than 8 months.