I've recently moved house into one with a Megaflo hot water system. The last few houses I've lived in have had Combi boilers and therefore hot water on demand. What I'm not clear about is how often I need to set the hot water to come on for. If it comes on for say an hour in the morning will there be enough hot water for showers etc? What happens with hot water for say washing your hands etc during the day, does the water not used stay hot? Do I have to set it to come on again in the evening for baths? How long does it take to heat, so if someone wants a bath in the middle of the day? Help, please??