Instant handwashers.

T i m · 2020-04-15T12:02:40+00:00

Years ago I nearly commissioned a conventional stored HW / CH systemhere but at the last knocking replaced the BF boiler with a BFmultipoint water heater.The only issue because of that path is that the hot supply from MPWHto downstairs bathroom basin / bath is in 22mm copper and so has agreater volume than had it just been 15mm.This means that if you add the warm up time of the heater you arelooking at around 30 seconds from cold to starting to get reasonablyhot water though (after that it's continuous of course).Not an issue if running a bath, a bit of an issue (time, water usageetc [1]) if running a basin of hot washing water but quite an issue ifrepeatedly wanting to wash your hands of Covid-19 in reasonably hotwater and reasonably quickly.A mate has just had a little (size and power consumption) Triton T30iinstant water heater that he says provides suitably hot water in about5-6 seconds so that would be a vast improvement. I also have very goodaccess to a mains water pipe and utility room ring main.I also have reasonable access to the cable that feeds the Triton T80electric shower but would prefer not to tap into that, even if it wasadvisable (what about the unlikely event of running the shower andhand washer at the same time (as they are in the same room etc)).But the thing that I haven't decided is if it would be worth going forone of the automatic, instant hand washing units and the question isreally how practical are they in use?eg, If you have to wave your hand in front of them, do you get enoughwater, long enough to wash your hands 'properly' (so 20+ seconds of'hot') and how likely is it they would trigger unnecessarily, like ifgoing to the std basin taps or the bathroom cabinet past it on theback wall (said water heater would be on the lhs wall).The storage type water heaters (under / over sink), whilst allowingthe use of the std hot tap, do have to store the hot water (morelosses?) and the hot becomes diluted quickly as the cold comes in (aproblem if...

Apr 15, 2020 Last reply: 6 years ago 21 Replies

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RJH 6 years ago

How much do they cost to run in (say) a 24 hour period?

A lot, I'd guess. It looks too small to have decent insulation . . .

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T i m 6 years ago

Understood.

It would, or the under-sink one set lower. ;-)

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Cheers, T i m

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