I would suggest to re-phrase the question: " How much are we willing to pay for comfort? " It's not really a matter of health or survival to have a warm room for breakfast etc., or a pre-warmed bed in the evening, is it?
As an example, our solar thermal system is now three years old. During the first two years I kept the backup boiler on all summer, and when the thermal store wasn't at 50°C in the evening, the boiler would top it up. This meant the boiler came on for maybe 20% of the days.
This year, I switched the boiler off in April, and only turned it manually back on for about four days in 5 months. Yes, we did have the odd tepid shower, and once or twice delayed showering to the next eve: no real hardship.
It'd be interesting to see how much gas etc. people of the "CH always on" group have used over summer?
Klaus
Klaus
indeed. I do keep my ASHP hot water backup on permanently. Over the summer it is the only item on the E7 heating circuit so easy to monitor. It used on average about 0.9kWh per day in June, July and August and has increased to about 1.6kWh per day in September. The cost therefore is not great
Poll
