back boiler question

format

Hi there, signed up to ask the forums advice on efficiently operating a back boiler. Just moved home and it has a big immersion heater tank in an upstairs cupboard and a back boiler behind a gas fire in what was once a chimney flue in the kitchen. Boiler has an old but digital control panel to pre-set programmes. I have an electric shower in the only bathroom and have no need for heating as it's a very warm house so only need it to heat water for washing dishes. I'm only occupant. What would be the most efficient way of heating dishwater ? I can pretty much guarantee i'll only do dishes on an evening so i was gonna try putting it on for a half hour in afternoon but some have mentioned leaving it on constant in low-use (no baths) situations can be better, or should i even skip the whole thing entirely and use a couple of kettle-fulls ? cheers for any insights -Dave

tacpot12

I would have thought that for one person's washing up, boiling a kettle would be the most efficient. The back boiler will either heat the entire hot water tank or just raise it to a lukewarm temperature if you don't run the boiler long enough.