What type of shower is cheapest to use

Bendy_House

Section62 said:

If not, then the OP's question is 'complicated'.

I don't see that Plumb's Q is at all complicated. It has certainly been made so, however. :-)

Bendy_House

Norman_Castle said:

twopenny said:

One consideration is that a power cut will mean no shower. 
While gas driven will remain - so far.

I might be wrong but I think gas boilers need electricity to work.

Oh don't you start... :-)

casper_gutman

The answer is obvious. The cheapest shower to use is a cold shower. HTH. 

daivid

casper_gutman said:

The answer is obvious. The cheapest shower to use is a cold shower. HTH. 

And a cold run off (or not off..) the combi will be cheaper than electric on cold…

twopenny

Ooops yes. 
I was forgetting it was my immersion (ie full tank of hot water) that saved the day during the last pc.
Appologies.

grumbler

Section62 said:

grumbler said:

Section62 said:

Bendy_House said:

I'd imagine as Grumb says; for the same delivered VOLUME of water, gas must surely be considerably cheaper?

Not as 'efficient' in converting the fuel to heat, but way more than compensated for by the lower energy cost.

not forgetting the cost of wasted water if on a metered supply.

Come on ... Why make things more complicated than they actually are?

Water costs about 1p/10L (?), and volume of 10 meters of 15mm pipe is just 5L. About 10L if it's 22mm pipe (very unlikely). So, for 10 meters of pipe we are talking about extra 1-2p when electric shower at the max power cost about 5p/min.

I also think 5 litres per 10m of 15mm pipe is rather generous....

Yes, guilty as charged. Doing calculations on the move never ends well...

However, the correction is in my favour

Section62

grumbler said:

Section62 said:

grumbler said:

Section62 said:

Bendy_House said:

I'd imagine as Grumb says; for the same delivered VOLUME of water, gas must surely be considerably cheaper?

Not as 'efficient' in converting the fuel to heat, but way more than compensated for by the lower energy cost.

not forgetting the cost of wasted water if on a metered supply.

Come on ... Why make things more complicated than they actually are?

Water costs about 1p/10L (?), and volume of 10 meters of 15mm pipe is just 5L. About 10L if it's 22mm pipe (very unlikely). So, for 10 meters of pipe we are talking about extra 1-2p when electric shower at the max power cost about 5p/min.

I also think 5 litres per 10m of 15mm pipe is rather generous....

Yes, guilty as charged. Doing calculations on the move never ends well...

However, the correction is in my favour

Happy to help.

The point remains that there is a non-zero cost attached to the wasted volume of water.

If we said 0.1p (again in your favour) it doesn't sound like a lot of money.  But in the context of (say) 5p for a minutes showering it is a noticeable percentage of the cost.

If we ignored that, the next thing people would want to ignore is the cost of the electrical consumption of the boiler while it is heating the water for the shower.....

GDB2222

Section62 said:

grumbler said:

Section62 said:

grumbler said:

Section62 said:

Bendy_House said:

I'd imagine as Grumb says; for the same delivered VOLUME of water, gas must surely be considerably cheaper?

Not as 'efficient' in converting the fuel to heat, but way more than compensated for by the lower energy cost.

not forgetting the cost of wasted water if on a metered supply.

Come on ... Why make things more complicated than they actually are?

Water costs about 1p/10L (?), and volume of 10 meters of 15mm pipe is just 5L. About 10L if it's 22mm pipe (very unlikely). So, for 10 meters of pipe we are talking about extra 1-2p when electric shower at the max power cost about 5p/min.

I also think 5 litres per 10m of 15mm pipe is rather generous....

Yes, guilty as charged. Doing calculations on the move never ends well...

However, the correction is in my favour

Happy to help.

The point remains that there is a non-zero cost attached to the wasted volume of water.

If we said 0.1p (again in your favour) it doesn't sound like a lot of money.  But in the context of (say) 5p for a minutes showering it is a noticeable percentage of the cost.

If we ignored that, the next thing people would want to ignore is the cost of the electrical consumption of the boiler while it is heating the water for the shower.....

Who said anything about run off? Maybe, the op has a recirculating hot water system. 

I mean, if we are going to make this complicated, let’s cover all the possible options.

Section62

GDB2222 said:

Section62 said:

grumbler said:

Section62 said:

grumbler said:

Section62 said:

Bendy_House said:

I'd imagine as Grumb says; for the same delivered VOLUME of water, gas must surely be considerably cheaper?

Not as 'efficient' in converting the fuel to heat, but way more than compensated for by the lower energy cost.

not forgetting the cost of wasted water if on a metered supply.

Come on ... Why make things more complicated than they actually are?

Water costs about 1p/10L (?), and volume of 10 meters of 15mm pipe is just 5L. About 10L if it's 22mm pipe (very unlikely). So, for 10 meters of pipe we are talking about extra 1-2p when electric shower at the max power cost about 5p/min.

I also think 5 litres per 10m of 15mm pipe is rather generous....

Yes, guilty as charged. Doing calculations on the move never ends well...

However, the correction is in my favour

Happy to help.

The point remains that there is a non-zero cost attached to the wasted volume of water.

If we said 0.1p (again in your favour) it doesn't sound like a lot of money.  But in the context of (say) 5p for a minutes showering it is a noticeable percentage of the cost.

If we ignored that, the next thing people would want to ignore is the cost of the electrical consumption of the boiler while it is heating the water for the shower.....

Who said anything about run off? Maybe, the op has a recirculating hot water system. 

I mean, if we are going to make this complicated, let’s cover all the possible options.

In a similar vein, who said anything about gas?

Bendy_House

Section62 said:

In a similar vein, who said anything about gas?

Someone should have, as it's the one-word answer to this thread

(Yeah yeah yeah, it's 'combi', but you know what I mean...)