On Fri, 16 Jul 2004 01:12:33 GMT, "Adam Aglionby"
wrote:

Had a look through the archive but still have a couple of questions.

Gas not being an option unfortunately, looking to replace header and
immersion tanks with some form of `undersink ` heating. To supply kitchen
sink and showeroom basin , replace current dribbling shower pump, non power
shower :-( , with electric shower.

Uvented Undersink appears to mean under a sink at least 4 meters away for
some models though, is this total?

Or can you have a tap tee`d below the 4M limit but overall pipe length to
second tap extends to the limit?

Hi,

The instructions on mine state it's to accomodate any expanded water
so it should be OK.

Is it better to have a the heater at the washing machine/sink or
bathroom/ex-water tank space?

Depends on the length of the pipe runs, they will reduce the capacity
of the heater effectively and waste some heated water.

Is a copper tank heater that much better than a Screwfix

http://www.screwfix.com/app/sfd/cat/...37130&id=68643

type thing, enameled steel tank?

It depends on how much water you require, I reckon a 15L though a TMV
would give you 25L of shower temperature water but pipe runs will
reduce that.

There is a 30L model available from somewhere, I could try and find it
if you want.


Is a 9.5kW flow boiler a better solution?

Depends on how much you would need to spend on extra wiring as well.

Another option could be to use a higher grade (pressure) immersion
tank with an expansion vessel connected to mains via a pressure
reducing valve, though this is not a 'normal' way of doing things.

cheers,
Pete.