hot water - what's cheaper ?

[EdT]

We've got a traditional boiler (not a combi) that is set to come on for an hour in the morning, and an hour in the evening. Wondering if cheaper to simply leave it on for good. What we think?

[Drop Test b3nxj]

I have found that if you over insulate your copper tank you can keep your water hot for a few days.

[Tuna]

Tank has to be very thoroughly insulated, in which case it shouldn't matter when it comes on. If there's not enough insulation, then leaving it on all the time will just be heating your house up (expensively). Without spending money, you're not going to save that much on daily costs.

[EdT]

Drop Test b3nxj said:

I have found that if you over insulate your copper tank you can keep your water hot for a few days.

Then presumably leaving the water always on would make little difference to your bill , if the thermostat is working properly?