oh it is much too early to heat the house yet but I am much happier with slow and steady. As mine is at 18 for 24/7, I expect the warm water will just trickle through and the condenser will work properly. 18 in the bedroom is minimum safe temperature for oldies and I am lucky in that I have some savings to support this
I am happy with the hot water temperature too, now adjusted down to 46 ( only safe if using a combi, not a cylinder for storage )
I did have the thermostats off and had a reality check to see the higher temperatures last year only 2-3 degrees higher but 18 will, I think, feel cool