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.
tomtom79 schrieb:
13kW? For 180m2 (1937 square feet) plus basement? And at almost 1000 meters (3280 feet) elevation? What kind of heat pump is it: horizontal ground loop collector or brine system?
Could you also specify your type of heat pump for comparison? No, it’s a Tecalor thz504 air-to-water heat pump (integrated unit with controlled residential ventilation and heat recovery).
220m² (2368 ft²) heated floor area
Average outdoor temperature -3°C (27°F)
Air-to-water heat pump
Heating curve 28 22 0
Room temperature 22°C (72°F), bathroom 22°C (72°F), humidity ratio 1.5
Hot water 50°C (122°F), humidity ratio 7
Central controlled residential ventilation system
KfW55 standard
Current consumption about 28 kWh/day. I am very satisfied with this. Before my optimization, it was about 60 kWh/day. This means the consumption has been halved.
Average outdoor temperature -3°C (27°F)
Air-to-water heat pump
Heating curve 28 22 0
Room temperature 22°C (72°F), bathroom 22°C (72°F), humidity ratio 1.5
Hot water 50°C (122°F), humidity ratio 7
Central controlled residential ventilation system
KfW55 standard
Current consumption about 28 kWh/day. I am very satisfied with this. Before my optimization, it was about 60 kWh/day. This means the consumption has been halved.
chewbacca12322 Jan 2020 23:15tomtom79 schrieb:
Heating curve set to 25.5 22 0Oh, 25.5, is that enough heat-wise?
chewbacca12323 Jan 2020 06:02tomtom79 schrieb:
The solar heat gain and the heat we produce during the day are probably sufficient.That’s really great!H
Hans-Maulwurf23 Jan 2020 10:06Bookstar schrieb:
Heating curve 28 22 0Hello, a quick question. What do these values represent?
In my heating curve settings, I can adjust the base temperature (28°C (82°F)), the starting point of the heating curve (18°C (64°F)), the standard outdoor temperature (-12°C (10°F)), and the maximum flow temperature (40°C (104°F)). How can I translate these values to something like 28 22 0? And are my settings suitable for a new build with underfloor heating?
Thanks
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