ᐅ Gas and electricity consumption in new construction

Created on: 13 Nov 2017 11:58
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sauerpeter
Hello everyone,

We are planning to switch our electricity and gas providers. To start: yes, I know you can’t generalize for every household, so I’m interested in average values. Here’s our situation:
- House size: 163 sqm (1755 sq ft)
- No basement
- 2 adults
- 1 child (1.5 years)
- Underfloor heating

For average electricity consumption, we are using local comparison websites. They suggest about 4250 kWh per year.
However, we’re having more trouble estimating gas usage. What values have you used, and how did that work out for you? Did you tend to underestimate or overestimate? The recommendations for gas vary widely. Some sources say 20,000 kWh for a single-family home with 4 people, others suggest 30,000 kWh for a single-family home with 2 people.

On the one hand, I don’t want to be unnecessarily financially burdened month to month, but on the other hand, I want to avoid a large additional payment after a year.
Does anyone have experience or advice on what is a reliable approach or good estimates to use?

I understand it depends on individual living situations—some like it cozy warm all year, others only turn the heating on when it’s at 0°C (32°F). I’m not looking for exact figures, but rather experiences regarding typical annual consumption.
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merlin83
14 Nov 2017 13:04
Interesting to hear about this. I thought it was normal. I have now contacted the manufacturer, and they are looking into the matter. Apparently, about 500 kWh is considered normal.

Thank you for the heads-up.
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SteffenBank
14 Nov 2017 13:37
4 people – 125m (410 feet)² – 23°C (73°F)
Gas: 11,036 kWh
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Bau-Schmidt
14 Nov 2017 23:00
merlin83 schrieb:
Whereas the ventilation alone is already between 900 and 1500 kWh.
That value seems a bit unrealistic. Depending on the ventilation unit, the average power consumption is approximately 60-90 watts.
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Alex85
15 Nov 2017 06:39
Have we already covered that?
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merlin83
30 Nov 2017 23:41
Quick update: The recorded kWh were apparently not the consumption but the calculated savings in heating output. I also measured the electricity consumption directly at the system and found it to be about 91 watts, which seems normal considering the piping network, the ventilated area, and the four-person household.

According to the manufacturer, the specifications rarely take into account the individual piping network with all pressure losses.

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