If anybody was wandering about actual performance, we are now in the house and on a couple of cold days the heating was working fabulously! Although 21 degrees is not really warm for me so had to rack the thermostat up.
Shame on you Mek. You're supposed to do your bit for the environment and put up with 21 degrees. Only Matt is allowed to ramp it up to 28 degrees in winter.
I only turn it up to 25!