G & E usage

sweetpa

If my gas boiler is on to heat hot water, would I use any more energy if I put the central heating on at the same time? My supplier has told me that I won't but I should welcome other views and perhaps even a definitive answer.

victor2

Yes you would, because you'll be heating the water being pumped around the radiators as well as the water in the tank.

macman

Your supplier needs to be sent for 'retraining'.

Pincher

sweetpa wrote: »

My supplier has told me that I won't but I should welcome other views and perhaps even a definitive answer.

It's TRUE, in India, where the call centre must be based, if you set the thermostat to 20 degrees, and turn the central heating on, it will NOT use any more energy. Because it's already 30 degrees!

SYNERGY

sweetpa wrote: »

If my gas boiler is on to heat hot water, would I use any more energy if I put the central heating on at the same time? My supplier has told me that I won't but I should welcome other views and perhaps even a definitive answer.

It depends on the type of boiler and your boiler / central heating / hot water set up.

Presuming you have an average combi boiler.

If, as above, you have an average combi boiler, you are say running a bath, then you switch on the central heating whilst running the bath, the boiler will not use any more gas, neither will it supply any heat to the central heating system at the same time.

The reason being that the boilers are designed to give priority to domestic hot water over central heating.

On the other hand, say you have the central heating on, you start to run a bath, the output of the boiler will be to hot water only, there will be no heat supplied to the central heating system.

So in this respect your supplier is correct.

macman

But it seems that the OP has a conventional boiler, not a combi. If I understand 'on to heat hot water' correctly...