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.
D
Daniel-Sp8 Jan 2021 18:19No, 48°C (118°F) setpoint with a 6K hysteresis means reheating from 42°C (108°F) up to 48°C (118°F) with Novelan (also with Alpha Innotec). The hysteresis is defined differently for domestic hot water production compared to heating mode.
D
Daniel-Sp8 Jan 2021 18:25chewbacca123 schrieb:
But then you have to run the water for about 1 minute before it gets warm, right? That's our experience. Basically a total waste of water.Either you waste water when the circulation is off, or you waste energy (electricity) when the circulation is on. I think energy is more expensive, and it also takes more startup cycles to heat up again. It’s an individual decision how much warm water comfort is worth to you.I’ll check the DTA log when the kids are asleep. Could you also send me a current CSV file?
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WilderSueden8 Jan 2021 18:27chewbacca123 schrieb:
But then you have to run the water for about a minute before it gets warm, right? That’s our experience. Honestly, such a waste of water. The heat is lost one way or another. With circulation, it’s lost continuously; without it, only when you use the water. And if you’re away for a few days...
Cold water is relatively cheap, heating in winter not so much.
edit:
someone actually posted the same comment faster...
chewbacca1238 Jan 2021 18:45Daniel-Sp schrieb:
Either you waste water when the circulation is off, or energy (electricity) when the circulation is on. I believe energy is more expensive, and it also requires more activation cycles for reheating. It’s an individual decision how much you value the comfort of having hot water readily available.
I’ll check the DTA log when the kids are asleep. Could you also send me an up-to-date CSV file by email?I’ll do it as soon as the little one is asleep.
chewbacca123 schrieb:
Hey, here are today’s data. The compressor hardly turns on anymore, great. But unfortunately, it’s still too cold in the bathroom; today with an outside temperature of -4°C (25°F), it’s only 20.7°C (69°F) in the bathroom. The heat exchanger is almost fully closed at 5.5 out of 6:
hi there,
I have the same heating system and similar consumption issues.
Can I use these values for my Lad9 csv file?
D
Daniel-Sp9 Jan 2021 19:34Since we do not know anything about your system (the heat pump is only one part of the entire system), the answer is clearly no.
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