I'm thinking of doing away with the immersion heater
in my bathroom, and getting a power-shower in its place.
I'll also have to get a small heater for the wash-basin.

I'm wondering if the power supply to the immersion heater
will be suitable, or if this will have to be replaced?
It is on its own circuit-breaker.

Any views on the merits of this?
The main reason is to give more space,
perhaps for a separate shower.

--
Timothy Murphy
gayleard /at/ eircom.net
School of Mathematics, Trinity College, Dublin

It depends on the size of cable, isolators and the circuit breaker. Most immersion circuits I have seen have used 2.5 T&E with 20A switches and 15/16A circuit breakers, as long as your instantaneous heater current draw does not exceed these parameters then I cannot see a problem. In the UK this installation is probably notifiable as the bathroom is considered a special place - do you have Part P in Ireland?

Richard

On 24/07/2015 16:49, Tricky Dicky wrote:
It depends on the size of cable, isolators and the circuit breaker. Most immersion circuits I have seen have used 2.5 T&E with 20A switches and 15/16A circuit breakers, as long as your instantaneous heater current draw does not exceed these parameters then I cannot see a problem. In the UK this installation is probably notifiable as the bathroom is considered a special place - do you have Part P in Ireland?

Richard

20A is only ~5kW, which isn't nearly enough for a shower. 7kW is about
the smallest you can get IIRC, but that's a bit of a dribble. A 10kW
(40A) shower is more reasonable.

Cheers
--
Syd

Timothy Murphy wrote:
I'm thinking of doing away with the immersion heater
in my bathroom, and getting a power-shower in its place.
I'll also have to get a small heater for the wash-basin.

I'm wondering if the power supply to the immersion heater
will be suitable, or if this will have to be replaced?
It is on its own circuit-breaker.

Unless you want to wash under one of those tiny heaters that dribbles warm
water over your hands, you present wiring will be completely inadequate.
Existing immersion is probably around 3KW. For an instantaneous heater, 7KW
will sort of work in summer but be miserable in winter.


Any views on the merits of this?

If an immersion heater is your only source of hot water, it's going to be
expensive to upgrade. Lots of new wiring needed.

The main reason is to give more space,
perhaps for a separate shower.

if you have gas, a combi boiler would probably be a better bet for you.

Tim

Syd the OP is talking about running an instant heater for a wash basin not a shower. Mind you the current draw could be similar to an electric shower hence the comment about current draw and cable sizes etc.

Richard

On 24/07/2015 17:13, Tricky Dicky wrote:
Syd the OP is talking about running an instant heater for a wash basin not a shower. Mind you the current draw could be similar to an electric shower hence the comment about current draw and cable sizes etc.

Richard


OP
I'm thinking of doing away with the immersion heater
in my bathroom, and getting a power-shower in its place.
I'll also have to get a small heater for the wash-basin.
/OP

I think you misread it and by 'power-shower' I think the OP meant
instant heat electric shower. But you may be right.

Cheers
--
Syd

On 24/07/2015 16:33, Timothy Murphy wrote:
I'm thinking of doing away with the immersion heater
in my bathroom, and getting a power-shower in its place.
I'll also have to get a small heater for the wash-basin.

I'm wondering if the power supply to the immersion heater
will be suitable, or if this will have to be replaced?
It is on its own circuit-breaker.

Any views on the merits of this?
The main reason is to give more space,
perhaps for a separate shower.


Judging by the answers received so far, I think we're all a bit confused
by the terminology you have used - and are unclear as to what you
*actually* want to do.

I'm not sure whether by "immersion heater" you mean that literally, or
the hot tank which it heats. Similarly, I'm not sure whether by "power
shower" you mean a shower booster pump for stored hot water, or
something which heats the water as it passes through. The questions
below should help to clarify the situation.

Do you:
a) want to get rid of your hot cylinder - heated by an immersion heater
- and install an electric shower which takes mains cold water and heats
it in "real time", or
b) want to retain your hot cylinder - heated by some other means (gas?)
- and simply use the existing immersion heater wiring to power a booster
pump to give you more flow to the shower?

If the answer is (b), there shouldn't be a problem. However, if the
answer is (a), it's extremely unlikely that a circuit designed for a
(3kW?) immersion heater will be adequate for a (10kW?) electric shower.

If your motivation is to create extra space, I rather suspect that the
answer is (a)!
--
Cheers,
Roger
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On Friday, 24 July 2015 16:33:05 UTC+1, Timothy Murphy wrote:
I'm thinking of doing away with the immersion heater
in my bathroom, and getting a power-shower in its place.
I'll also have to get a small heater for the wash-basin.

I'm wondering if the power supply to the immersion heater
will be suitable, or if this will have to be replaced?
It is on its own circuit-breaker.

for a hot tap water heater, yes.
to power an electric shower, debateable but probably no.

Any views on the merits of this?
The main reason is to give more space,
perhaps for a separate shower.


NT

wrote in news:b709006c-2a46-442d-83dc-
:

On Friday, 24 July 2015 16:33:05 UTC+1, Timothy Murphy wrote:
I'm thinking of doing away with the immersion heater
in my bathroom, and getting a power-shower in its place.
I'll also have to get a small heater for the wash-basin.

I'm wondering if the power supply to the immersion heater
will be suitable, or if this will have to be replaced?
It is on its own circuit-breaker.

for a hot tap water heater, yes.
to power an electric shower, debateable but probably no.

Any views on the merits of this?
The main reason is to give more space,
perhaps for a separate shower.


NT

Power Shower is the accepted term for a pump to give additional flow to an
existing hot mixed with cold water supply.

On 7/24/2015 4:33 PM, Timothy Murphy wrote:

I'm thinking of doing away with the immersion heater
in my bathroom, and getting a power-shower in its place.

I take it you mean an electric shower rather than a power shower (the
latter does not heat the water, just pumps it for greater pressure /
flow rate)?

I'll also have to get a small heater for the wash-basin.

You could use the immersion heater feed for that.

I'm wondering if the power supply to the immersion heater
will be suitable,

Nope, not a chance.

or if this will have to be replaced?
It is on its own circuit-breaker.

Added to, you will need the exiting feed for your inline basin heater...

Any views on the merits of this?
The main reason is to give more space,
perhaps for a separate shower.

Could you cite the cylinder somewhere else? (loft even)

Could you use a combination boiler?


--
Cheers,

John.

/================================================== ===============\
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|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/

On 24/07/2015 19:22, DerbyBorn wrote:
wrote in news:b709006c-2a46-442d-83dc-
:

On Friday, 24 July 2015 16:33:05 UTC+1, Timothy Murphy wrote:
I'm thinking of doing away with the immersion heater
in my bathroom, and getting a power-shower in its place.
I'll also have to get a small heater for the wash-basin.

I'm wondering if the power supply to the immersion heater
will be suitable, or if this will have to be replaced?
It is on its own circuit-breaker.

for a hot tap water heater, yes.
to power an electric shower, debateable but probably no.

Any views on the merits of this?
The main reason is to give more space,
perhaps for a separate shower.


NT

Power Shower is the accepted term for a pump to give additional flow to an
existing hot mixed with cold water supply.

Indeed. And Immersion Heater is the accepted term for the electrical
element which fits inside a hot water cylinder to heat the water.

But I suspect that the OP is talking about an electrically heated shower
and a hot water cylinder. [See my earlier post seeking clarification].
--
Cheers,
Roger
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On Fri, 24 Jul 2015 17:22:48 +0100, Syd Rumpo
wrote:

On 24/07/2015 17:13, Tricky Dicky wrote:
Syd the OP is talking about running an instant heater for a wash basin not a shower. Mind you the current draw could be similar to an electric shower hence the comment about current draw and cable sizes etc.

Richard


OP
I'm thinking of doing away with the immersion heater
in my bathroom, and getting a power-shower in its place.
I'll also have to get a small heater for the wash-basin.
/OP

I think you misread it and by 'power-shower' I think the OP meant
instant heat electric shower. But you may be right.

Cheers

If he has hot water storage for the pumped shower why can't he use the
same source (un-pumped) for the basin hot tap?

Unless he *does* mean an electric shower after all, in which case he
will need a new cable to the CU.

Over to you OP.





--

Graham.

%Profound_observation%

On Friday, 24 July 2015 16:33:05 UTC+1, Timothy Murphy wrote:
I'm thinking of doing away with the immersion heater
in my bathroom, and getting a power-shower in its place.
I'll also have to get a small heater for the wash-basin.

You could use something like this which will do a shower and a basin:

http://www.fastlec.co.uk/redring-pow...eater-45793201

Not 'warrantied' for baths or 'large kitchen sinks'.

Owain

Tricky Dicky wrote:

do you have Part P in Ireland?

It's not called Part P but I think it is more or less equivalent:
"It is illegal for anyone other than a Registered Electrical Contractor
(REC) to carry out electrical work in your home.
Minor electrical works such as changing switches, sockets or light fittings
are not covered by this legislation."


--
Timothy Murphy
gayleard /at/ eircom.net
School of Mathematics, Trinity College, Dublin

Syd Rumpo wrote:

I think you misread it and by 'power-shower' I think the OP meant
instant heat electric shower.

That is what I meant.
I guess that would mean a new wire back to the CU,
which would be rather expensive in my case.


--
Timothy Murphy
gayleard /at/ eircom.net
School of Mathematics, Trinity College, Dublin

On Friday, 24 July 2015 23:50:53 UTC+1, Timothy Murphy wrote:
Syd Rumpo wrote:

I think you misread it and by 'power-shower' I think the OP meant
instant heat electric shower.

That is what I meant.
I guess that would mean a new wire back to the CU,
which would be rather expensive in my case.

Yes, unless you can use a low power unit. Last shower I measured was using 3kW in summer, 4kW in winter, and that should be no problem on an immersion feed. I don't know if you'd need to look at non-shower heaters for that.


NT

On Friday, 24 July 2015 19:22:05 UTC+1, DerbyBorn wrote:
nt wrote in news:b709006c-2a46-442d-83dc-
:

On Friday, 24 July 2015 16:33:05 UTC+1, Timothy Murphy wrote:
I'm thinking of doing away with the immersion heater
in my bathroom, and getting a power-shower in its place.
I'll also have to get a small heater for the wash-basin.

I'm wondering if the power supply to the immersion heater
will be suitable, or if this will have to be replaced?
It is on its own circuit-breaker.

for a hot tap water heater, yes.
to power an electric shower, debateable but probably no.

Any views on the merits of this?
The main reason is to give more space,
perhaps for a separate shower.

Power Shower is the accepted term for a pump to give additional flow to an
existing hot mixed with cold water supply.

it is, but that doesn't make sense here


NT

wrote:
On Friday, 24 July 2015 23:50:53 UTC+1, Timothy Murphy wrote:
Syd Rumpo wrote:

I think you misread it and by 'power-shower' I think the OP meant
instant heat electric shower.

That is what I meant.
I guess that would mean a new wire back to the CU,
which would be rather expensive in my case.

Yes, unless you can use a low power unit. Last shower I measured was
using 3kW in summer, 4kW in winter, and that should be no problem on an
immersion feed. I don't know if you'd need to look at non-shower heaters for that.


NT

Apart from hand washing units, where can you get such a low powered shower?
My experience of one rated at 7KW was that it could only be described as
"barely adequate".

Tim

On 24/07/2015 23:50, Timothy Murphy wrote:
Syd Rumpo wrote:

I think you misread it and by 'power-shower' I think the OP meant
instant heat electric shower.

That is what I meant.
I guess that would mean a new wire back to the CU,
which would be rather expensive in my case.



Not only that, but it would also need a hefty breaker in the CU - and
some CUs only have one suitable slot for that, so all of the other
wiring could need re-arranging.
--
Cheers,
Roger
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checked.

On Saturday, 25 July 2015 14:17:30 UTC+1, Tim+ wrote:
Apart from hand washing units, where can you get such a low powered shower?

Caravan suppliers possibly, intended for use on a 13A / 16A supply.

http://www.ebay.co.uk/itm/Mini-Porta...-/251593017367

Come complete with chinese lettering and australian plug :-)

Owain

On 25/07/2015 12:58, wrote:
On Friday, 24 July 2015 23:50:53 UTC+1, Timothy Murphy wrote:
Syd Rumpo wrote:

I think you misread it and by 'power-shower' I think the OP meant
instant heat electric shower.

That is what I meant.
I guess that would mean a new wire back to the CU,
which would be rather expensive in my case.

Yes, unless you can use a low power unit. Last shower I measured was using 3kW in summer, 4kW in winter, and that should be no problem on an immersion feed. I don't know if you'd need to look at non-shower heaters for that.


NT

You are of course joking! What sort of shower flow rate can you get with
3 or 4 kW? Likely to be not much more than a dribble!
--
Cheers,
Roger
____________
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checked.

wrote in message
...
On Friday, 24 July 2015 23:50:53 UTC+1, Timothy Murphy wrote:
Syd Rumpo wrote:

I think you misread it and by 'power-shower' I think the OP meant
instant heat electric shower.

That is what I meant.
I guess that would mean a new wire back to the CU,
which would be rather expensive in my case.

Yes, unless you can use a low power unit. Last shower I measured was using
3kW in summer, 4kW in winter, and that should be no problem on an
immersion feed. I don't know if you'd need to look at non-shower heaters
for that.


What the **** are you talking about?


--
Adam

On 7/25/2015 2:39 PM, Roger Mills wrote:
On 24/07/2015 23:50, Timothy Murphy wrote:
Syd Rumpo wrote:

I think you misread it and by 'power-shower' I think the OP meant
instant heat electric shower.

That is what I meant.
I guess that would mean a new wire back to the CU,
which would be rather expensive in my case.



Not only that, but it would also need a hefty breaker in the CU - and
some CUs only have one suitable slot for that, so all of the other
wiring could need re-arranging.

In which case just add a secondary CU for the shower.


--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/

"Roger Mills" wrote in message
...
On 24/07/2015 23:50, Timothy Murphy wrote:
Syd Rumpo wrote:

I think you misread it and by 'power-shower' I think the OP meant
instant heat electric shower.

That is what I meant.
I guess that would mean a new wire back to the CU,
which would be rather expensive in my case.



Not only that, but it would also need a hefty breaker in the CU - and some
CUs only have one suitable slot for that, so all of the other wiring could
need re-arranging.



Thats a new one for me.



--
Adam

On 25/07/2015 17:28, ARW wrote:
"Roger Mills" wrote in message
...


Not only that, but it would also need a hefty breaker in the CU - and
some CUs only have one suitable slot for that, so all of the other
wiring could need re-arranging.



Thats a new one for me.



Probably before your time!

The Wylex 6-way CU which I fitted in the 1980's had a notice saying that
all the slots were limited to 30A except for the one nearest the on/off
switch - which could take 40+A (I forget the exact rating).

I'm still using the CU, but the cartridge fuses have subsequently been
replaced with MCBs.
--
Cheers,
Roger
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checked.

"Roger Mills" wrote in message
...
On 25/07/2015 17:28, ARW wrote:
"Roger Mills" wrote in message
...


Not only that, but it would also need a hefty breaker in the CU - and
some CUs only have one suitable slot for that, so all of the other
wiring could need re-arranging.



Thats a new one for me.



Probably before your time!

The Wylex 6-way CU which I fitted in the 1980's had a notice saying that
all the slots were limited to 30A except for the one nearest the on/off
switch - which could take 40+A (I forget the exact rating).

I'm still using the CU, but the cartridge fuses have subsequently been
replaced with MCBs.



So a fuse box not a CU?


--
Adam

On Saturday, 25 July 2015 21:25:14 UTC+1, ARW wrote:
So a fuse box not a CU?

No, a consumer unit formerly fitted with fuses.

"Consumer Unit (may also be known as a consumer control unit). A particular type of distribution board comprising a type-tested co-ordinated assembly for the control and distribution of electrical energy, principally in domestic premises, incorporating manual means of double-pole isolation on the incoming circuit(s) and an assembly of one or more fuses, circuit breakers, residual current operated devices or signalling and other devices proven during the type-test of the assembly as suitable for use."
IEE Wiring Regulations Seventeenth Edition - British Standard BS7671:2008, Part 2 Definitions (cited in wikipedia: consumer unit)

A fuse box would be a box with fuses in it, usually not having a switch.

Owain

wrote in message
...
On Saturday, 25 July 2015 21:25:14 UTC+1, ARW wrote:
So a fuse box not a CU?

No, a consumer unit formerly fitted with fuses.

"Consumer Unit (may also be known as a consumer control unit). A particular
type of distribution board comprising a type-tested co-ordinated assembly
for the control and distribution of electrical energy, principally in
domestic premises, incorporating manual means of double-pole isolation on
the incoming circuit(s) and an assembly of one or more fuses, circuit
breakers, residual current operated devices or signalling and other devices
proven during the type-test of the assembly as suitable for use."
IEE Wiring Regulations Seventeenth Edition - British Standard BS7671:2008,
Part 2 Definitions (cited in wikipedia: consumer unit)

A fuse box would be a box with fuses in it, usually not having a switch.

https://en.wikipedia.org/wiki/Consumer_unit

That wiki article is a joke.

And there is little chance that a Wylex fuse box could be used to power a
new shower installation due to the lack of RCD protection,


--
Adam

On 25/07/2015 21:25, ARW wrote:
"Roger Mills" wrote in message
...
On 25/07/2015 17:28, ARW wrote:
"Roger Mills" wrote in message
...


Not only that, but it would also need a hefty breaker in the CU - and
some CUs only have one suitable slot for that, so all of the other
wiring could need re-arranging.



Thats a new one for me.



Probably before your time!

The Wylex 6-way CU which I fitted in the 1980's had a notice saying
that all the slots were limited to 30A except for the one nearest the
on/off switch - which could take 40+A (I forget the exact rating).

I'm still using the CU, but the cartridge fuses have subsequently been
replaced with MCBs.



So a fuse box not a CU?



Is there a difference? I thought that "Consumer Unit" was simply a fancy
new name for "Fuse Box". I can't remember what it was called when I
bought it - I *think* it was described an a CU but I can't swear to it.

AIUI, they both take an input from the meter and allow a number of
individually protected circuits to be connected - using re-wirable
fuses, cartridge fuses, MCBs, RCBOs, whatever. OK, modern ones now have
dual RCDs and all sorts of fancy tat - but weren't they called CUs
before all of that?
--
Cheers,
Roger
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On 25/07/2015 22:19, wrote:
On Saturday, 25 July 2015 21:25:14 UTC+1, ARW wrote:
So a fuse box not a CU?

No, a consumer unit formerly fitted with fuses.

"Consumer Unit (may also be known as a consumer control unit). A particular type of distribution board comprising a type-tested co-ordinated assembly for the control and distribution of electrical energy, principally in domestic premises, incorporating manual means of double-pole isolation on the incoming circuit(s) and an assembly of one or more fuses, circuit breakers, residual current operated devices or signalling and other devices proven during the type-test of the assembly as suitable for use."
IEE Wiring Regulations Seventeenth Edition - British Standard BS7671:2008, Part 2 Definitions (cited in wikipedia: consumer unit)

I should have read that before posting my last post.

A fuse box would be a box with fuses in it, usually not having a switch.


Well, whatever I've got certainly has a 2-pole isolator switch in
addition to the fuses/breakers.
--
Cheers,
Roger
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checked.

On 25/07/2015 22:39, ARW wrote:


And there is little chance that a Wylex fuse box could be used to power
a new shower installation due to the lack of RCD protection,



Not under current regulations, anyway.

Interestingly, I had an extension built in 1994 which included an
en-suite - and the original intention was to have an electric shower in
the en-suite. So I had a circuit installed with 6mm (I think) cable -
utilising this first slot in the CU. In the event, I ran a hot feed to
the shower from the HW cylinder and only used this circuit for a shower
pump - but it would otherwise have powered an electric shower without
RCD protection - perfectly legally at that time as far as I am aware.

Whether or not I'd still have been here now is another matter! g
--
Cheers,
Roger
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On Saturday, 25 July 2015 14:41:32 UTC+1, Roger Mills wrote:
On 25/07/2015 12:58, nt wrote:
On Friday, 24 July 2015 23:50:53 UTC+1, Timothy Murphy wrote:
Syd Rumpo wrote:

I think you misread it and by 'power-shower' I think the OP meant
instant heat electric shower.

That is what I meant.
I guess that would mean a new wire back to the CU,
which would be rather expensive in my case.

Yes, unless you can use a low power unit. Last shower I measured was using 3kW in summer, 4kW in winter, and that should be no problem on an immersion feed. I don't know if you'd need to look at non-shower heaters for that.


NT

You are of course joking! What sort of shower flow rate can you get with
3 or 4 kW? Likely to be not much more than a dribble!

No. 2.25 lpm.


NT

On Saturday, 25 July 2015 14:17:30 UTC+1, Tim+ wrote:
nt wrote:
On Friday, 24 July 2015 23:50:53 UTC+1, Timothy Murphy wrote:
Syd Rumpo wrote:

I think you misread it and by 'power-shower' I think the OP meant
instant heat electric shower.

That is what I meant.
I guess that would mean a new wire back to the CU,
which would be rather expensive in my case.

Yes, unless you can use a low power unit. Last shower I measured was
using 3kW in summer, 4kW in winter, and that should be no problem on an
immersion feed. I don't know if you'd need to look at non-shower heaters for that.

Apart from hand washing units, where can you get such a low powered shower?
My experience of one rated at 7KW was that it could only be described as
"barely adequate".

then I guess that's not what you want
There are a few ways to reduce shower power with it still feeling good: aeration, pressure, drain heat exchanger.


NT

On 26/07/2015 09:57, wrote:
On Saturday, 25 July 2015 14:41:32 UTC+1, Roger Mills wrote:
On 25/07/2015 12:58, nt wrote:
On Friday, 24 July 2015 23:50:53 UTC+1, Timothy Murphy wrote:
Syd Rumpo wrote:

I think you misread it and by 'power-shower' I think the OP meant
instant heat electric shower.

That is what I meant.
I guess that would mean a new wire back to the CU,
which would be rather expensive in my case.

Yes, unless you can use a low power unit. Last shower I measured was using 3kW in summer, 4kW in winter, and that should be no problem on an immersion feed. I don't know if you'd need to look at non-shower heaters for that.


NT

You are of course joking! What sort of shower flow rate can you get with
3 or 4 kW? Likely to be not much more than a dribble!

No. 2.25 lpm.


NT

That *is* a dribble! A decent shower needs at least 10 lpm.
--
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Roger
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checked.

wrote:
On Saturday, 25 July 2015 14:17:30 UTC+1, Tim+ wrote:
nt wrote:
On Friday, 24 July 2015 23:50:53 UTC+1, Timothy Murphy wrote:
Syd Rumpo wrote:

I think you misread it and by 'power-shower' I think the OP meant
instant heat electric shower.

That is what I meant.
I guess that would mean a new wire back to the CU,
which would be rather expensive in my case.

Yes, unless you can use a low power unit. Last shower I measured was
using 3kW in summer, 4kW in winter, and that should be no problem on an
immersion feed. I don't know if you'd need to look at non-shower heaters for that.

Apart from hand washing units, where can you get such a low powered shower?
My experience of one rated at 7KW was that it could only be described as
"barely adequate".

then I guess that's not what you want
There are a few ways to reduce shower power with it still feeling good:
aeration, pressure, drain heat exchanger.


NT

Drain heat exchanger?? To recover feck all heat from a 3kw shower? I trust
you've costed this out and can point us all to a suitable device that's
already available?

Tim

wrote in message
...
On Saturday, 25 July 2015 14:41:32 UTC+1, Roger Mills wrote:
On 25/07/2015 12:58, nt wrote:
On Friday, 24 July 2015 23:50:53 UTC+1, Timothy Murphy wrote:
Syd Rumpo wrote:

I think you misread it and by 'power-shower' I think the OP meant
instant heat electric shower.

That is what I meant.
I guess that would mean a new wire back to the CU,
which would be rather expensive in my case.

Yes, unless you can use a low power unit. Last shower I measured was
using 3kW in summer, 4kW in winter, and that should be no problem on an
immersion feed. I don't know if you'd need to look at non-shower
heaters for that.


NT

You are of course joking! What sort of shower flow rate can you get with
3 or 4 kW? Likely to be not much more than a dribble!

No. 2.25 lpm.

So only slightly more moist than a nun's **** then?



--
Adam

On 26/07/2015 16:03, Tim+ wrote:
wrote:
On Saturday, 25 July 2015 14:17:30 UTC+1, Tim+ wrote:
nt wrote:
On Friday, 24 July 2015 23:50:53 UTC+1, Timothy Murphy wrote:
Syd Rumpo wrote:

I think you misread it and by 'power-shower' I think the OP meant
instant heat electric shower.

That is what I meant.
I guess that would mean a new wire back to the CU,
which would be rather expensive in my case.

Yes, unless you can use a low power unit. Last shower I measured was
using 3kW in summer, 4kW in winter, and that should be no problem on an
immersion feed. I don't know if you'd need to look at non-shower heaters for that.

Apart from hand washing units, where can you get such a low powered shower?
My experience of one rated at 7KW was that it could only be described as
"barely adequate".

then I guess that's not what you want
There are a few ways to reduce shower power with it still feeling good:
aeration, pressure, drain heat exchanger.


NT

Drain heat exchanger?? To recover feck all heat from a 3kw shower? I trust
you've costed this out and can point us all to a suitable device that's
already available?

Tim

I'm not so sure it's a bad idea. After all, the water is mostly falling
on a warm body. Consider the difference between summer and winter in a
7kW shower.

You'd need some good active flow control to maintain a constant
temperature, and you'd start off with a dribble before the heat
exchanger started working. Perhaps also a proportion of the water could
be recirculated as long as you don't have the habit of ****ing in the
shower.

But it's probably not worth it where power and water in shower
quantities are cheap.

Cheers
--
Syd

On Sunday, 26 July 2015 16:10:20 UTC+1, ARW wrote:
So only slightly more moist than a nun's **** then?

You speak from experience?

Owain

Syd Rumpo wrote:
On 26/07/2015 16:03, Tim+ wrote:
wrote:
On Saturday, 25 July 2015 14:17:30 UTC+1, Tim+ wrote:
nt wrote:
On Friday, 24 July 2015 23:50:53 UTC+1, Timothy Murphy wrote:
Syd Rumpo wrote:

I think you misread it and by 'power-shower' I think the OP meant
instant heat electric shower.

That is what I meant.
I guess that would mean a new wire back to the CU,
which would be rather expensive in my case.

Yes, unless you can use a low power unit. Last shower I measured was
using 3kW in summer, 4kW in winter, and that should be no problem on an
immersion feed. I don't know if you'd need to look at non-shower heaters for that.

Apart from hand washing units, where can you get such a low powered shower?
My experience of one rated at 7KW was that it could only be described as
"barely adequate".

then I guess that's not what you want
There are a few ways to reduce shower power with it still feeling good:
aeration, pressure, drain heat exchanger.


NT

Drain heat exchanger?? To recover feck all heat from a 3kw shower? I trust
you've costed this out and can point us all to a suitable device that's
already available?

Tim

I'm not so sure it's a bad idea. After all, the water is mostly falling
on a warm body. Consider the difference between summer and winter in a 7kW shower.

You'd need some good active flow control to maintain a constant
temperature, and you'd start off with a dribble before the heat exchanger
started working. Perhaps also a proportion of the water could be
recirculated as long as you don't have the habit of ****ing in the shower.

But it's probably not worth it where power and water in shower quantities are cheap.

Cheers

Oh in theory it may not be a bad idea BUT bear in mind the the "hot" water
dribbling out of this 3kw shower will have given up most of its heat to the
air before it ever hits the drains. If you can actually find a unit on
sale in the UK you're a better googler than I. The only ones I could find
don't seem to be on sale any more (I wonder why?) and mention a minimum
flow of 5L/min.

As a way of improving a shower it must surely be *way* down the list of
realistic options. One Dr Drivel would be proud of though.

Tim

wrote in message
...
On Sunday, 26 July 2015 16:10:20 UTC+1, ARW wrote:
So only slightly more moist than a nun's **** then?

You speak from experience?


A 2.25 lpm shower could not give my ******** a good wash.

--
Adam