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.
chewbacca12318 Dec 2019 15:50Musketier schrieb:
Do you use the guest room regularly because you have a 2 there?
For me, that’s the room where I still have a dehumidifier running. The door is mostly closed and the dehumidifier is set to a low level. It only gets turned up when guests come over or when our child wants to set up their racetrack for a longer time.I dry laundry there, so it shouldn’t be too cold. I always monitor the humidity and temperature with a hygrometer. Otherwise, it’s rarely used; I think 1.5 meters (5 feet) is probably sufficient.D
Daniel-Sp18 Dec 2019 16:22The room temperatures are still fine.
You can reduce the parents’ zone to 0.75. Tomorrow, measure the return temperature while heating. Then adjust the return of the dressing room accordingly. Both heating circuits should have approximately the same return temperature.
Please measure the supply and return temperatures of the small bathroom, then check the current supply and return temperatures in the heat pump control and set both accordingly.
The return temperatures in the living area should also be roughly the same.
If you have bought the recommended thermometer, you can measure directly by placing it on the pipe, taking three readings for verification.
The base temperature of 21°C (70°F) is probably too low, we will see.
Show the heating technician the flow tube that is difficult to read; he should actually replace it...
You can reduce the parents’ zone to 0.75. Tomorrow, measure the return temperature while heating. Then adjust the return of the dressing room accordingly. Both heating circuits should have approximately the same return temperature.
Please measure the supply and return temperatures of the small bathroom, then check the current supply and return temperatures in the heat pump control and set both accordingly.
The return temperatures in the living area should also be roughly the same.
If you have bought the recommended thermometer, you can measure directly by placing it on the pipe, taking three readings for verification.
The base temperature of 21°C (70°F) is probably too low, we will see.
Show the heating technician the flow tube that is difficult to read; he should actually replace it...
chewbacca12318 Dec 2019 16:53Daniel-Sp schrieb:
The room temperatures are still fine.
You can reduce the supply temperature multiplier to 0.75. Tomorrow, measure the return temperature while heating, then adjust the return temperature for the dressing room accordingly. Both heating circuits should have roughly the same return temperature.
Please measure the flow and return temperatures of the small bathroom, then check the current supply and return temperatures in the heat pump control system and set both here.
The return temperature in the living area should also be roughly the same.
If you bought the recommended thermometer, you can place it directly and take three measurements for self-verification.
The base temperature of 21°C (70°F) is probably too low, we’ll see.
Show the heating technician the flow indicator tube that can’t be read properly; he should replace it. Alright, I will definitely do that tomorrow. I bought the thermometer you recommended (basetech Mini 1).
Yes, he should definitely replace that tube. It’s unacceptable that nothing can be read there. He should also check why the float in the main bathroom always sticks at the top, as if there was 0.0 volume present.
chewbacca12319 Dec 2019 09:17Daniel-Sp schrieb:
Good morning, here are the data from this morning. Nothing has changed again :-( total heat in the bedroom and hallways, but the bathroom is still only 20.8°C (69.4°F). I have now set the ERR to 2.5 while sleeping, I can’t leave it that hot, our baby wakes up every 2 hours (usually sleeps through the night).
Temperatures were measured at 5:30 am, at that time the controlled ventilation system was running at reduced power (from 10 pm to 7 am). I have adjusted the heating curve to 29-21-0 and set -0.5 on the main settings.
The pump has been off for 4 hours, so no data yet on supply/return temperatures.
The technician is coming this afternoon. He is supposed to boost heating in the bathroom and living area!
D
Daniel-Sp19 Dec 2019 09:38Hallway and bedroom each lowered by 0.4 meters (1 ft 4 in), small bathroom at 2 meters (6 ft 7 in). I am now on my way to Denmark, will check in again in the evening. Please also provide the supply and return temperatures for the small bathroom.