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.
RotorMotor schrieb:
With gas, it’s pretty clear—where would any advantage come from?
It’s different with air-to-water heat pumps.
These benefit both from higher outdoor temperatures and, if available, from using your own photovoltaic electricity. The thing with photovoltaic is a bit tricky. Today (and also yesterday) looks great, but otherwise, for example, in the last 30 days, I haven’t produced even 20 kWh. I basically generated more in the last 1.5 days than throughout December (Valley of Darkness).
I estimate about 5 kWh of the 32 kWh was for the electric car to get to work today :-).
But as you can see, even a battery doesn’t help. When the heat pump needs power, that’s the end of it.
nordanney schrieb:
By now, you should almost be at the "setting" stage with the new build. It doesn’t cool down that quickly. Don’t underestimate it, the screed will definitely cool down by about 5°C (9°F) overnight, even in a new build.
nordanney schrieb:
With new construction, you’re probably almost at the stage of “turning it off.” It doesn’t cool down that quickly. I’m not sure what “turning it off” means for you. But for my heat pump, heating mode is considered “off” when the average temperature over two days is below 10°C (50°F) and a return flow temperature of 20°C (68°F) is required.
With a 2K (2°F) hysteresis, this “off” heating mode still means room temperatures of 13–14°C (55–57°F) if the thermostatic radiator valves (TRVs) are either fully open or removed.
In this state, I can’t completely turn off the heat pump unless I do it via the main fuse box or close the TRVs, right?
Guys, I’m shocked. I looked up Novelan and Alpha Innotec in a search engine. The reviews on Google are a complete disaster and exactly confirm my suspicion: these systems are total electronic junk, sold at very high prices.
Since online reviews can be tricky, I also checked other manufacturers like Buderus. Their ratings are excellent, around 4.5 stars with positive feedback.
I also know many people with Buderus or Viessmann systems, and everything seems to be running smoothly there. But I keep hearing about problems with those Novelan Chinese knockoffs from friends and acquaintances.
It seems I was sold extremely overpriced electronic trash 🙁
Since online reviews can be tricky, I also checked other manufacturers like Buderus. Their ratings are excellent, around 4.5 stars with positive feedback.
I also know many people with Buderus or Viessmann systems, and everything seems to be running smoothly there. But I keep hearing about problems with those Novelan Chinese knockoffs from friends and acquaintances.
It seems I was sold extremely overpriced electronic trash 🙁
D
Daniel-Sp11 Jan 2021 13:46Mine is working very well….
...and I can't say yet, as I will only be able to check the two heating cycles after work.
But if the temperature difference is correct and nothing else is malfunctioning, then, as shown in the screenshot excluding the house consumption, the heat pump consumption yesterday was 18 kWh.
However, I still don't fully trust the whole setup.
But if the temperature difference is correct and nothing else is malfunctioning, then, as shown in the screenshot excluding the house consumption, the heat pump consumption yesterday was 18 kWh.
However, I still don't fully trust the whole setup.
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