Often with combi boilers, if you turn off the water it takes a solid 30s to a minute for the water to come up to temperature again, sometimes longer if you acco

Often with combi boilers, if you turn off the water it takes a solid 30s to a minute for the water to come up to temperature again, sometimes longer if you account for the water in the pipes and the thermostat reaching equilibrium. Obviously newer/better boilers come up to temperature quicker but you don't always have the luxury of choosing your boiler.