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

Residential building at the foot of the Swabian Jura.

There are colder spots, but it already belongs to the cooler regions. NAT -11.49

KfW55, 165m² (1776 sq ft) + basement, single-family house (room temperature approx. 22-24°C (72-75°F))
Location BW, 940m (3084 ft) above sea level
Average temperature in January 2021 at 2m (6.6 ft): -2.3°C (27.9°F) (20 ice days, 27 frost days)
Heat pump consumption: 506 kWh

@face26
How far along are you with the hydraulic balancing?

Personally, I would try to adjust the flow rates so that all rooms reach the desired temperatures.

face26 schrieb:

If anyone has any insights on this, I’d be interested to hear.

In January, the internal meter shows 2606 kWh of heat energy used for heating and hot water.
Electricity according to the internal meter is 542 kWh (only one household meter, no separate one for the heat pump; I might add one later).
Total electricity for the house in January was 920 kWh.

Single-family house, moved in November. 140 m² (1507 sq ft) of living space, plus 78 m² (840 sq ft) of basement within the thermal envelope. About half of the basement is heated to around 18°C (64°F). The building complies with energy saving regulations and its insulation values are roughly equivalent to KfW55 standard.
I have no idea what to compare this to or how to assess it. At least it’s not a total disaster, I think...

This is a good example. The size and standard are very similar. I don’t heat the 32 m² (344 sq ft) of my 71 m² (764 sq ft) basement. I wrote that last week already. If the return sensor had been calibrated by the end of December, the total electricity would have been about 750 kWh on the meter yesterday. This is our second winter.

Heat energy since January 13th is 1027 kWh.

T_im_Norden schrieb:

How far along are you with the hydraulic balancing?

Still in the middle of it. That would be my approach as well. At the moment, it’s working pretty well despite some rooms being partially turned off. The rooms that are cooler now don’t need to be warmer since their flow rate is currently zero. However, they are probably being warmed by the adjacent rooms, which are partly set to around 18°C (64°F). The question now is whether to leave it as is or slightly open the cooler rooms and then lower the temperature a bit in the others.

Zaba12 schrieb:

This is a good example. Size and standards are very similar. I don’t heat my 32sqm (344 sq ft) out of 71sqm (764 sq ft) basement. I already mentioned that last week. If the return sensor had been calibrated by the end of December, the total electricity consumption on the meter would have been about 750 kWh yesterday. This is our second winter.

Heat output since 13.01.: 1027 kWh

Yes, and I saw the excerpt from your energy certificate... Your values are clearly better than mine. Your insulation values are more in the KfW40 range, if I can put it that way.
Therefore, I think it’s reasonable with some room for improvement plus the first-winter effect.

Edit: Anyone interested and who has the data at hand can add values from the energy certificate:

Final energy demand 17 kWh/(sqm·a), primary energy demand 30.6 kWh/(sqm·a), Ht 0.282