We're going away for a couple of days. The boiler is in the loft and has a froststat in it that will fire it up if it goes as low as 4C in there (IIRC). The programmer/timer in the hallway has a factory-set default min temp of 13C (but can be adjusted) and normally doesn't have any timed events over the weekend - we just do the heating manually at weekends because we never know what time we'll get out of bed or whatever.
I don't want to waste gas while the house is empty but neither do I want burst pipes or some other disaster to happen while we're away. Does the 13C sound about right? Should it be lower/higher?
Cheers