ᐅ Heat Pump Energy Consumption in 2019 on a Monthly Basis

Created on: 27 Nov 2019 10:44

I would like to start a new comparison thread and learn about your energy consumption. I am not completely satisfied with mine.

KFW55
Heated area 200 m2 (2,150 sq ft), underfloor heating
Standard rooms 19°C (66°F), living areas 22°C (72°F), bathroom 23°C (73°F)
Air-to-water heat pump with centralized controlled ventilation system
Domestic hot water temperature 50°C (122°F)

Data collection unfortunately only since April 2019:

April	407
May	347
June	109
July	131
August	144
September	198
October	356

I will update the table monthly. November will be included soon, with an estimated 650 kWh.

Bookstar1 Dec 2019 19:01

#79

That’s at least not a small amount. Hot water at 50 degrees Celsius (122°F) is fine, but reduce the hysteresis from 2K to at least 6K. I think the high consumption is more likely due to the flow temperature and the ERR.

Do you have a basement?

Lumpi_LE1 Dec 2019 19:30

#80

Sounds like a very high energy consumption at first for a KfW 40 house with 150sqm (1,615 sq ft). But it is located at a high altitude and the supply temperature is in the forest area.

Bookstar6 Dec 2019 14:11

#81

After my optimizations, my daily consumption has decreased from 60 kWh to about 30 kWh. However, I still find this too high. The goal would be 20 to 25 kWh at minus 3 degrees Celsius (27°F). That would be reasonable compared to others. At the moment, I’m not sure what else I can adjust.

Lumpi_LE6 Dec 2019 14:25

#82

20-25 is acceptable; if you use less with the same house, you might have large south-facing windows, lower indoor temperatures, slightly higher flow temperature, better insulation, less ventilation... and so on.

guckuck26 Dec 2019 14:58

#83

I think 30 for the building size is not entirely unrealistic. It also varies from day to day.

What settings have you settled on now?

Lumpi_LE6 Dec 2019 15:16

#84

Oh, I see, "the goal would be," sorry, misread that.

ᐅ Heat Pump Energy Consumption in 2019 on a Monthly Basis

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