I normally just have the radiator on in my main living room and have all the others off, I have heating on full for about 10 mins to warm up quick, then turn down to a quarter just to keep it 'snug', but I was chatting to a builder today who said it doesn't make any real difference how many rads you have on as the once they're working up to temp, the boiler doesn't really use more gas to keep them all up to temp.
I always thought it used more gas?
Is he talking bollox or sense?
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