They make a nice clicking sound.
Why is everyone so keen on having switches anyway?
Why is everyone so keen on having switches anyway?
don't bat an eyelid at putting 240V actually inside the shower cubicle behind just a flimsy plastic cover.

I can't see why anyone would want to use one in preference to plumbing in a good mixer shower from the main hot-water system.
Which one(s)?Because they are required by the regs.
How do they do that?They are for preventing death or injury
Which one(s)?Because they are required by the regs.
Because the plastic cover is not flimsy, (unless you buy a cheap import from down the pub), and designed in a manner which, when installed correctly, prevents the ingress of moisture.
Hence, one of the requirements for it being notifiable. It MUST be installed correctly.
There are a lot of people that don't want to have a cylinder full of hot water, either because of the standing losses or simply because they don't use any hot water other than for showering. Dishwashers, washing machines etc. all run from cold these days...
Heres the thing. The combi boiler, whilst being cheaper per kw to run, is very wasteful compared to the shower can.Many of the newer "combi" units don't maintain a big cylinder full of hot water all the time but heat pretty much on demand.
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