Hello,
I know there are many factors affecting electricity consumption, so it might be a bit of guesswork. Still, I want to give it a try.
We have a ground-source heat pump (deep drilling). We heat about 170 sqm (1,830 sq ft) with it and don’t have large electricity consumers like an aquarium, etc. Our house meets the KFW 55 standard.
Currently, we use roughly 30 kWh per day on average for everything (heating and regular electricity). We rarely have temperatures below freezing at night. When I calculate the consumption over 30 days, it comes to about €250 per month in winter. Of course, consumption is naturally lower in summer.
Does anyone have comparable numbers? We just moved in in October, and I’m wondering if the heating system is working properly (efficiently) and if the output from the ground loop is as expected.
Looking forward to your feedback.
Greetings from Lake Constance,
mading
I know there are many factors affecting electricity consumption, so it might be a bit of guesswork. Still, I want to give it a try.
We have a ground-source heat pump (deep drilling). We heat about 170 sqm (1,830 sq ft) with it and don’t have large electricity consumers like an aquarium, etc. Our house meets the KFW 55 standard.
Currently, we use roughly 30 kWh per day on average for everything (heating and regular electricity). We rarely have temperatures below freezing at night. When I calculate the consumption over 30 days, it comes to about €250 per month in winter. Of course, consumption is naturally lower in summer.
Does anyone have comparable numbers? We just moved in in October, and I’m wondering if the heating system is working properly (efficiently) and if the output from the ground loop is as expected.
Looking forward to your feedback.
Greetings from Lake Constance,
mading
blackm88 schrieb:
We have an air-to-water heat pump with controlled ventilation and heat recovery. Household consumption is about 175 kWh, heat pump total about 640 kWh. Malz1902 schrieb:
Living in the house since December, currently using about 30 kWh daily (household electricity + heat pump). Oh dear, with electricity consumption PER HOUR, it almost pays off to have your own power plant.
Now, something constructive:
Try googling heat pump consumption database or add a .de at the end... That will probably help you best to assess electricity consumption. I think the household electricity is within a reasonable range.
PhiTh schrieb:
Oh dear, with power consumption PER HOUR, it’s almost worth having your own power plantHahaha – yes, you’re right. But I’ve found the mistake or the reason why you came to that conclusion.
Nordmann schrieb:
The annual performance factor for hot water seems a bit low. What is your current brine temperature and what hot water setpoint temperature do you have?I checked: the inlet temperature averages around 5°C (41°F). Hot water temperature is set at 50°C (122°F). However, it also depends on where the sensor is located inside the boiler. The room setpoint temperature is 20°C (68°F).
Do you really need water that warm? I also started at 50°C (122°F) and have now lowered it to 48°C (118°F). This improved the annual performance factor (APF) by 0.2 and reduced compressor run times at higher load levels. So far, a 170-liter (45-gallon) tank has been sufficient. When four adults shower, it gets a bit tight.
The delta T of 5°C (9°F) is, of course, great; my baskets are currently delivering only 0.2°C (0.4°F) at the beginning of the cycle and drop to -4.0°C (7°F) during a combined heating and hot water cycle.
The delta T of 5°C (9°F) is, of course, great; my baskets are currently delivering only 0.2°C (0.4°F) at the beginning of the cycle and drop to -4.0°C (7°F) during a combined heating and hot water cycle.