how much difference in pressure electric showers?

paul4798

I have bought a 9kw shower and just telephoned a installation company and they advised me it would have been £100 cheaper to install an 8.5kw shower.

I am thinking of flogging my 9.0kw shower and buying a 8.5kw but worry if i do that the pressure will be a lot less.

The question is is it?

thanks

Paul

grumbler

Difference in flow will be very small (about 5.5%). I do not understand why 9Kw is £100 more expensive to install. The only difference could be that it needs thicker cable. It is more likely to be the difference between showers price.

robowen

grumbler wrote:

Difference in flow will be very small (about 5.5%). I do not understand why 9Kw is £100 more expensive to install. The only difference could be that it needs thicker cable. It is more likely to be the difference between showers price.

Go and get a price for 10mm Tw+earth cable and you'll understand why.

grumbler

robowen wrote:

Go and get a price for 10mm Tw+earth cable and you'll understand why.

6242Y 10.0 Harmonised Core Colours 25M - 9.75kg - £31.99

Malestrom

10mm T&E is recommended for anything over 7.5Kw anyway, so can't see that this would be the cause in price increase.

bestyman

On a short run with exposed cable 6mm is sometimes ok for a 8.5kw shower so maybe this explains why.

Why an electric shower anyhow?

If you have a cylinder you could get a power shower with a brilliant flow. If you have a combi of mains heater you could just buy a mixing valve and IMHO get a shower flow better than that of a 9kw electric shower . No need to run wires this way ( ok apart from small supply to power shower pump) so savings made there .

Find out where the hot water comes from then have a re think.

Mark