Hello everyone,
Since I’m a bit unsure and our installer said everything is normal, I’m reaching out to you. We have been living in our newly built house since early 2021. It is a traditionally constructed house built to the KFW55 standard. The heated living area is about 140 m² (1507 sq ft).
We have underfloor heating throughout and a Dimplex air-to-water heat pump (LA 9S-TU). In 2021, the heat pump’s electricity consumption was 5715 kWh.
To be honest, we expected the electricity consumption to be somewhat lower. However, finding comparison values is quite difficult.
What are your experiences with the electricity consumption of your heat pump? Is this realistic?
Thanks very much for sharing your experience!
Best regards,
Michael
Since I’m a bit unsure and our installer said everything is normal, I’m reaching out to you. We have been living in our newly built house since early 2021. It is a traditionally constructed house built to the KFW55 standard. The heated living area is about 140 m² (1507 sq ft).
We have underfloor heating throughout and a Dimplex air-to-water heat pump (LA 9S-TU). In 2021, the heat pump’s electricity consumption was 5715 kWh.
To be honest, we expected the electricity consumption to be somewhat lower. However, finding comparison values is quite difficult.
What are your experiences with the electricity consumption of your heat pump? Is this realistic?
Thanks very much for sharing your experience!
Best regards,
Michael
W
WilderSueden13 Dec 2022 22:34Please break down the electricity and heat consumption into domestic hot water and heating. It sounds like quite a lot at first, but the heating demand should be roughly around 5000 kWh of heat = approximately 1500 kWh of electricity. Hot water is additional.
In new buildings, there is also a certain residual moisture present, which also increases the heating demand.
In new buildings, there is also a certain residual moisture present, which also increases the heating demand.
Does this consumption also include the screed heating phase? If not, I find a consumption of about 17 kW quite high for an estimated annual performance factor of 3.
We also built in 2016 (I think it was under the Energy Saving Ordinance 2014 at the time) and improved the insulation and exterior walls, among other things.
Consumption is around 10 kW with room temperatures of 22–24°C (72–75°F).
We also built in 2016 (I think it was under the Energy Saving Ordinance 2014 at the time) and improved the insulation and exterior walls, among other things.
Consumption is around 10 kW with room temperatures of 22–24°C (72–75°F).
B
Benutzer 100114 Dec 2022 00:01There is a database—try searching Google for "web-based heat pump consumption database."
However, something seems off regarding the house size and the consumption. Is the electric heating element running constantly?
However, something seems off regarding the house size and the consumption. Is the electric heating element running constantly?
X
xMisterDx14 Dec 2022 00:35It’s like saying, "I drive a Golf station wagon and use 8 liters of diesel per 100 kilometers (5 miles per gallon), is that normal?"
When was the heating turned on? How warm are your rooms? How often do you shower or take baths? How many people live in the house? What is the heating system’s design flow temperature?
Energy consumption for heating is higher in the first years because a lot of moisture still needs to be ventilated out.
By the way, the heating demand is calculated based on a room temperature of 19°C (66°F). Heating to 23°C (73°F) already increases consumption by 25%.
Then there’s long, frequent showers, plus a flow temperature of 40°C (104°F) because the heating pipes were installed far apart.
An acquaintance consumes 4,500 kWh per year in his 200 m² (2,150 sq ft) house with a ground source heat pump because he heats the place to 24°C (75°F).
An annual consumption of 5,000 kWh at move-in is not unrealistic at all.
When was the heating turned on? How warm are your rooms? How often do you shower or take baths? How many people live in the house? What is the heating system’s design flow temperature?
Energy consumption for heating is higher in the first years because a lot of moisture still needs to be ventilated out.
By the way, the heating demand is calculated based on a room temperature of 19°C (66°F). Heating to 23°C (73°F) already increases consumption by 25%.
Then there’s long, frequent showers, plus a flow temperature of 40°C (104°F) because the heating pipes were installed far apart.
An acquaintance consumes 4,500 kWh per year in his 200 m² (2,150 sq ft) house with a ground source heat pump because he heats the place to 24°C (75°F).
An annual consumption of 5,000 kWh at move-in is not unrealistic at all.
xMisterDx schrieb:
By the way, the heat demand calculation is done based on an indoor temperature of 19°C (66°F).That is not correct. According to DIN EN 12831, the indoor temperature is set at 20°C (68°F), and 24°C (75°F) for bathrooms. Otherwise, you are right—it depends.Similar topics