Gas or Economy 7 for water.

mikemaple

I'm sure someones bound to have asked already (i can't find it) - But Economy 7 3KW immersion on timer - or gas for heating water ?

In case in makes a difference boiler is Baxi wm 51 3rs.

Cardew

3 unknowns! and type of boiler makes a huge difference.

A. Price you get E7 electricity

B. Price you get gas

C. Efficiency of your boiler.

Gas ranges between 2p to 2.5p/kWh; boiler efficiency between 50% and 95%

So using those figures, gas will cost between 2.1p/kWh and 5p/kWh

For most people there is little advantage either way; with a modern condensing boiler gas wins, an old boiler E7.

Bear in mind that you have E7 you are paying a lot more for all your daytime electricity; and most people with gas CH find it difficult to make E7 a worthwhile proposition.

SwanJon

Also depends on how much hot water you use each day and the insulation on your tank.
If you find you are topping up the tank a lot during the day, the benefit moves towards gas.
Use a little with a well insulated tank, and it can lean towards E7