I doubt if it's worth having a gas boiler and a heat pump in our climate. I might have tried 18 degrees, but herself feels the cold and there's no question of having it any cooler than she's happy with. TBH I'm a bit nesh as well. Living room stat's set at 22-23. Temp at sitting down level settles at around 20-21. Bed and bathrooms a bit cooler but not much, so that could account for what looks like a chunky cost. I've already forecast £3,000 of electric this year and looks as if half of that will fall in Dec-Feb. We do have a high phantom load here as well, what with cameras, ventilation system, alarm, outside lights
Some people we know locally have their heating at 14C. I don't think they are hard up, they have just got obsessed with energy saving. They seem to be OK, but I think they are quite likely to have damp problems at that temperature.
We've been using the log burner in the evenings. I've been buying logs for convenience, I can get through maybe £2-3 worth in an evening. I have more or less got the hang of the stove but I find I have to give it quite a bit of attention to keep it in the zone of usefulness - i.e. not smouldering low, or infernally hot.
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