ᐅ Air-to-Water Heat Pump: Current Consumption and Data

And please record the temperatures every 2-3 minutes when a heating cycle starts; during the first 15 minutes, there should be no increase in the temperature of the return flow.

90 kWh is, in my opinion, too much at 1 degree Celsius (34°F) outdoor temperature.

At -8 degrees Celsius (18°F), I had 60 kWh.

T_im_Norden schrieb:

In my opinion, 90 kWh is too high at an outside temperature of 1°C (34°F).

I had 60 kWh at -8°C (17.6°F).

The house is very well insulated, airtight, and dry. Everything has been verified according to the KFW55 standard. So, there should be no issues with the building envelope. Ventilation behavior is normal to very low, due to the use of a controlled mechanical ventilation system.

The house is freestanding and it’s quite windy, etc. But does that make that much of a difference? I’m not sure.

Do you have any ideas?

Create a new thread.

In it, write the following:
Current supply/return temperatures
Room temperature in the rooms
Floor heating design according to the heating installer
Heating load according to the heating installer
Number of control valves
Number and length of heating circuits
Controller active or not
Heating circuit settings/flow rates
Buffer tank yes/no
Circulation yes/no
Daily heating runtimes in hours and number of starts (please no charts)

Whether you have already performed a hydraulic balancing, and if so, what your numbers were before.

24h heating: 4.86 kWh electricity for 28.1 kWh heat output, whatever that is supposed to mean.
24h domestic hot water: 0.8 kWh electricity

24h total household consumption: 17.1 kWh

I think your house is built on a hot lava field. It can't be anything else 😀.

Unfortunately, none of the numbers add up.