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.
chewbacca12323 Dec 2019 21:30Tina mit K schrieb:
I have to jump in here and say that @Daniel-Sp definitely deserves a pizza-sized cookie and a whole swarm of busy bees for all the hard work. It’s incredible how much help is being offered here. Absolutely! Outstanding advice, truly a big thank you.
chewbacca12323 Dec 2019 21:31Daniel-Sp schrieb:
Good move, the circulation pump should run as little as possible. For example, only in the evening when the kids are showering/bathing. As briefly as possible, but at least once a day!Seriously, what you have helped me with here is absolutely amazing. No technician would have explained it to me this way. Now I understand our heating system and the whole setup. Until two weeks ago, I had no clue—huge thanks to you. Honestly, I would like to send you a small payment via PayPal for your help. What is your address?
D
Daniel-Sp23 Dec 2019 22:02Alright, let it be, I’m enjoying this too!
I hope many readers following along will benefit as well. And you’re not done yet. After New Year’s, you’ll need to tackle the bypass valve to get the system running smoothly. Unfortunately, I can’t help with the bathroom; you’ll have to rely on the electric towel warmer there...
I hope many readers following along will benefit as well. And you’re not done yet. After New Year’s, you’ll need to tackle the bypass valve to get the system running smoothly. Unfortunately, I can’t help with the bathroom; you’ll have to rely on the electric towel warmer there...
chewbacca12324 Dec 2019 08:34Daniel-Sp schrieb:
Let it be, I’m actually enjoying this too!
I hope many readers can benefit as well. And you’re not done yet. After New Year, you’ll need to tackle the bypass valve to get the system running smoothly. Unfortunately, I can’t help with the bathroom since you have to rely on the electric towel warmer... Honestly, you’re doing such a great job, thank you so much for that.
You helped me a lot, and the fact that the bathroom isn’t getting any warmer isn’t your fault. (This morning at 8 a.m., it was 20.7°C (69.3°F)).
But I find it strange because the bathroom used to be quite warm before, so something can be done there. Back then, the heating curve was 40 - 20 - 0 and the individual room controllers were not open. During that time, we experienced many compressor starts. I’m staying on top of it and experimenting. I have now set the heating curve as follows: 29.5 - 22.5 - 0. Let’s see how that affects things.
According to the heating technician, most of the meters are installed in the bathroom. I expect to receive the documentation in the new year.
If only we could reach at least 21.3°C (70.3°F) in the bathroom, that would already be sufficient.
I wish you and everyone else here a Merry Christmas, relaxing days, and plenty of gifts.
chewbacca12325 Dec 2019 09:07Daniel-Sp schrieb:
Let it be, I enjoy it too!
I hope many readers benefit from this as well. And you’re not done yet. After New Year, you’ll need to tackle the bypass valve to get the system running smoothly. I can’t help with the bathroom though, you’ll unfortunately have to rely on the electric towel radiator there... Good morning, my compressor starts have significantly decreased; about two weeks ago, they were averaging every 14 minutes, but now it looks much better. Data from 23.12. to 25.12.:
It could probably only get better by modifying the bypass valve, but I’m not confident enough to do that yet. That should be done by the heating engineer.
The energy consumption in kWh over the last 24 hours is still 20. I thought the water settings would reduce that. What could be the reason? The water schedule is set for 6–10 a.m., 12–2 p.m., 5–10 p.m.
Regarding temperatures: the hallway is still at 22.8°C (73°F), although I have reduced the flow rate to 1 at the top and 0.75 at the bottom. The children’s room is too warm at 22.4°C (72°F) when the little rascal sleeps there starting next year. The flow rate there is set to 0.75. Should I reduce it further?
The large bathroom was at 21.0°C (70°F). I have now been able to set the full dosage volume to 2.9–3.0, maybe something will change by tomorrow. 21.3°C (70°F) would be great! If not, we’ll have to live with that.
Best regards