- Oct 8, 2022
The compressor doesn’t run at max all the time. Min is 2.6kW so somewhere in between.https://www.vaillant.co.uk/downloads/aproducts/renewables-1/flexotherm/flexotherm-230-v-tech-spec-1-2-web-1057063.pdf
This is a data sheet for a valiant set of heat pumps
If you look at the 11Kw system you’ll see that it is made up of a compressor that uses a maximum of 4.1KW and an additional electric heater which is 5.5KW do a bit of maths around the current use, the rest of the electronics uses another ~2Kw That’s where the 11KW comes from it is the energy the actual heat pump uses, that is not the energy it is extracting from the ground
I don’t see why the auxiliary heater would be needed if there is a decent hot water storage that the house can draw from.
Generally you can reckon of around 1 kW in to 3 kW out perhaps a little more depending on temperatures.