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.
chewbacca12322 Jan 2020 09:06Ok, thanks.
We heat 190 m² (2,045 sq ft) of living space.
Our hot water is set to 47°C (117°F), with circulation from 6:45 to 10 a.m., 5 to 7 p.m., and 8 to 10 p.m.
We heat 190 m² (2,045 sq ft) of living space.
Our hot water is set to 47°C (117°F), with circulation from 6:45 to 10 a.m., 5 to 7 p.m., and 8 to 10 p.m.
chewbacca12322 Jan 2020 09:35halmi schrieb:
Yesterday, we used 24 kWh. The hot water cycle is set between 42-48°C (108-118°F). There is no circulation system. The average indoor temperature is between 21.5-22°C (71.7-71.6°F). The heated area is 219 m² (2357 ft²), KfW 55 standard with a primary energy demand of 18.9 kWh/(m²·a).We also set the hot water hysteresis to 6, so the temperature range is between 41-47°C (106-117°F).
- Last 7 days: 93 kWh
- Domestic hot water production continuously at 48°C (118°F)
- Circulation from 5:30 AM to 8 AM and 4 PM to 7 PM
- Heating curve slope 0.2 / parallel shift +2°C (3.6°F)
- Set temperature 22°C (72°F) / actual room temperature 22.5°C - 23°C (72.5°F - 73°F)
- Heated area 130 m² (1,400 sq ft)
Previous settings:
Parallel shift 0 and reduced flow (-20% pump)
Actual temperature 21°C (70°F)
Consumption week 15.01.–22.01.: 89 kWh
Consumption week 08.01.–15.01.: 108 kWh
Consumption week 01.01.–08.01.: 103 kWh
- Domestic hot water production continuously at 48°C (118°F)
- Circulation from 5:30 AM to 8 AM and 4 PM to 7 PM
- Heating curve slope 0.2 / parallel shift +2°C (3.6°F)
- Set temperature 22°C (72°F) / actual room temperature 22.5°C - 23°C (72.5°F - 73°F)
- Heated area 130 m² (1,400 sq ft)
Previous settings:
Parallel shift 0 and reduced flow (-20% pump)
Actual temperature 21°C (70°F)
Consumption week 15.01.–22.01.: 89 kWh
Consumption week 08.01.–15.01.: 108 kWh
Consumption week 01.01.–08.01.: 103 kWh
chewbacca12322 Jan 2020 09:41M4rvin schrieb:
- Last 7 days: 93 kWh
- Domestic hot water generation constantly at 48°C (118°F)
- Circulation from 5:30 AM to 8 AM and 4 PM to 7 PM
- Heating curve slope 0.2 / parallel shift +2°C (3.6°F)
- Set temperature 22°C (72°F) / actual room temperature 22.5°C - 23°C (72.5°F - 73.4°F)
- Heated area 130 m² (1,400 sq ft)
Previous settings were:
Parallel shift 0 and lower flow rate (-20% pump power)
Actual temperature 21°C (70°F)
Energy consumption week 01/15 – 01/22: 89 kWh
Energy consumption week 01/08 – 01/15: 108 kWh
Energy consumption week 01/01 – 01/08: 103 kWh Wow, such low kWh consumption! That’s great.
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