Hot water in the shed - long term project.

I have a mains feed to the shed protected by a 40A RCBO. So full chat at 220 * 40 = 8.8 kW. Or pushing it, 250 * 40 = 10 kW.
I also have mains water and main drainage.
Looking at electric showers, I guess I could run something like <https://www.screwfix.com/p/triton-enrich-white-8-5kw-manual-electric- shower/52753> if I didn't have anything else major running apart from a light or two.
I was considering a hot water tank and an immersion heater for more total heat over a slower period but that seems to run to over £200 for a basic set up.
For hand washing there are what look like shower units without the shower which makes me wonder if there is a way to divert the shower to the hand basin and use the same unit.
However this seems to get good ratings <https://www.screwfix.com/p/redring-ms6-undersink-stored-water- heater-1-5kw-6ltr/5314p> and also looks to be an easy install. At the price it seems to be easier than messing about with a shower.
Any other strategies?
Basic requirements for the shed will be toilet, shower and hand basin (or possibly larger sink for washing stuff).
Cheers
Dave R
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AMD FX-6300 in GA-990X-Gaming SLI-CF running Windows 7 Pro x64

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On Tue, 13 Aug 2019 19:38:48 +0000, David wrote:
<snip>
The Redring water heater above says there must be at least 1.7m of 15mm cold feed between the heater and the next cold draw off to allow for expansion. Less in 22 mm.
Otherwise an expansion vessel and non-return valve must be fitted.
An expansion vessel and non-return valve seems to cost more than the heater; £67.99 for the heater and £79.95 for the expansion vessel.
<https://www.screwfix.com/p/redring-ms6-undersink-stored-water- heater-1-5kw-6ltr/5314p>
<https://www.screwfix.com/p/zip-expansion-vessel-check-valve-247- x-127mm/4309t>
I'm now wondering why you wouldn't just run an extra bit of 22mm cold pipe.
Also wondering if that part is over kill.
Cheers
Dave R
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David explained :

If all you want is hand washing, the usual fix is an instant over sink 3kw water heater.
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On 13/08/2019 21:32, Harry Bloomfield wrote:

That sounds like the answer to me. Cheapest from a quick search is the Triton T30i 3kW from Amazon for £40 although there are under sink ones for £50.
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Doesn't work for the shower.
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newshound pretended :

I think I have a brand new one in a box in my garage you could have for a tenner, if you can collect extreme east of west Yorks?
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On Wed, 14 Aug 2019 12:45:11 +0100, Harry Bloomfield, Esq. wrote:

Where is that in relation to Leeds?
Cheers
Dave R
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David formulated on Wednesday :

About 10 miles east.
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On Thu, 15 Aug 2019 08:23:06 +0100, Harry Bloomfield, Esq. wrote:

Thanks. Remind me to get back to you the next time I visit my son. :-)
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Look at "tankless lpg water heater" or "tankless propane water heater"...
Run off a bottle: gas in, fumes out, cold water in, hot water out. Power is off two D cells. Certification is likely not compliant...
Thomas Prufer
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On Wed, 14 Aug 2019 08:12:44 +0200, Thomas Prufer wrote:

AFAIK Propane costs about the same as electricity; that is, a lot more than natural gas from the mains.
As I have mains electricity I'm not sure of the benefit of using bottled gas.
Cheers
Dave R
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24 kW or 28 kW, and corresponding water output, for around 100 quid.
It would be overkill if it's just warm water for hand washing, or a low-volume shower.
Thomas Prufer
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On Wednesday, 14 August 2019 19:59:10 UTC+1, Thomas Prufer wrote:

If it were just handwashing I'd consider a diy solar setup on the roof.
NT
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On Tuesday, 13 August 2019 20:38:50 UTC+1, David WE Roberts (Google) wrote :

asic

Unless you get a second hand one from someone upgrading to unvented hot wat er. Of course in a shed frost-proofing a header tank might be more difficul t.

Electric showers really aren't supposed to have any valve or possible restr iction on the output, and some can be very fussy about the spray if not sup plied by the manufacturer.
However multipoint electric instantaneous heaters are available.
https://www.stiebel-eltron.co.uk/en/products-solutions/dhw/instantaneous_wa terheater/all-products.html?_charset_=utf-8&enabledFilterName=refcode_S F004051&enabledFilterValue=::|SF004051::x|SF004052::x|SF004053::x|SF00405 4::x|SF004055::x|SF004056::x|SF004179::x|SF004180::x|SF004181::x&refcode_SF 004051=SF004179::x&sort=by_relevance&result-counterA%20products%20m atch%20to%20your%20selection.&page=1
Owain
Owain
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