The flow rate of the new shower is not fantastic considering the large amount of rewiring that was done. I measured the following flow rates at different temperates.
mains water temp = 12.6 C
setting temp temp-increase lits/min 0 12.6 C 0 C 10.0
4 34.7 C 22.1 C 5.5 7 39.0 C 26.4 C 4.7 8 41.2 C 28.6 C 4.3 9 42.7 C 30.1 C 4.2 10 43.8 C 31.2 C 4.0Does the 9kW unit seem to be working at full capacity?
From what I remember of my school days, there's some way of using the specific heat capacity of water to actually calculate how much energy the water has gained based on the increase in temperature.
I think a 9kW shower should provide 9,000 joules of electrical energy per second. There's also something about calories in the calculation but I'm not sure where! :-(
From my figures, does anyone know how to calculate if 9kW power is actually getting supplied to the water?