OP
Engineer54
E54 - in my experience, every place we've ever taken our mutt to has used an electric shower unit, and that's loads of places as they forever seem to open under false hope and bad research and close six months later!
If you take guidance from the regs with regards to livestock, then there is very much a case to treat this as no different from any other 701/702 location as animals are more susceptible than we are.
Besides, with RCBO's being so cheap these days its hardly worth the bother of not doing it.
I think i'll stick with my original thinking and stay with an immersion heater for this setup. I'm thinking this way because i can't see how you can get sufficient luke warm spray from a standard instantaneous electric shower. I maybe wrong and willing to be convinced otherwise. Anyway, an immersion type heater will be far cheaper to run, especially if this dog parlour lasts more than 6 months...lol!!
Think you'll find that those regulations would relate more to a farming environment where the animals will be walking on bare concrete floors, that would be getting regular hose downs. I would hope that wouldn't be the case in a dog grooming parlour, where you would expect some sort of PVC based floor covering. but the point is well placed/made, and should be taken note of by the OP.