Kw rating of an immersion??

kelbal

Hi. Trying to figure out if its more economical to run my Triton electric shower for 5 or 6 minutes - or heat the immersion for 30 minutes to get the same 6 minute shower.
The electric shower, at 10Kw, run for 6 minutes would use up 1Kwh.
So I guess to beat the electric shower, the immersion would need to use less than 1Kwh, so run for 30 minutes its rating would need to be at most 2Kw.

Are my assumptions correct?

So - what is the rating of a typical immersion? Mine is about 4 years old, bought in Heat Merchants.

Thanks

lomb

3kw I think.
Thing is the immersion provides all taps so more utility value and dont forget if the water is warm the next time its used less electric is needed. Best solution if possible is night rate water heating on a superlagged cylinder and piping.

If thats not possible then of course the instant shower will be cheaper as nothing is 'wasted'

Remember though that night rate makes the day rate dearer so I dont think its cost effective unless storage heating or running electrical consumers at night ie washing /dishwashing etc.

kelbal

grand, thanks for the info

heinbloed

Storage losses have to be avoided.
Therefore the direct electric heating is more economical than storage electrical heating.
In the OP's cases the loss of distribution is to be taken into account as well.