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

In the last 24 hours, the heat pump has consumed 40 kWh.
AT = -10°C (14°F)

Bookstar schrieb:

For the AT, I have 32 degrees and 28 degrees. So my heating curve seems to be a bit steeper. Let’s see how the temperatures look tomorrow morning. I think your consumption is really good.

How large was your house?

The heated area is 218m² (2,346 ft²). Last night it was really cold... my heat pump lets the return flow drop quite a bit. Compared to 9:00 pm yesterday evening, the indoor temperature is also slightly cooler.

tomtom79 schrieb:

Phew, you have a modulating one! Then it would make sense to increase the runtime, first set the hysteresis back to 2 degrees, and then lower the heating curve; this way it should run longer.

I will do that today.

Final result after 24 hours: 160 kWh heat output and 47 kWh electricity consumption. Seasonal performance factor 3.5

Positive: trouble-free operation, which is already very good. Indoor temperatures around 21 - 22°C (70 - 72°F), just as we want them.

Now the consumption would still need to go down by about 20% to be ideal. But it seems to be more due to the high heat demand than to the efficiency of the pump.

The air exchange rate looks quite good now for the temperatures; I think it will only improve if you manage to get your heat pump running continuously.

I will try increasing the hysteresis from 1.5 to 2, that should help somewhat. I don't want to lower the heating curve right now, as the bathroom would become too cold.

The only thing left is to find out where the heat is diffusing to. Today, I will reduce the ventilation by one level. The new hydraulic balancing also needs at least 2 days before it starts to have any effect.

So, I'm looking for faults and found condensation on the window, but there's a new thread about that. Stay tuned! 🙂