On Thu, 4 Aug 2005 12:22:13 +0100, "Doctor Drivel"
wrote:


"John Rumm" wrote in message
...
Christian McArdle wrote:

Frankly the combi is just poor; baths are just not worth having
and the shower flow is disturbed so much by washing machines,
dishwashers etc.


You can (and probably should these days) run off cold fill only.

Probably better for the clothes / dishes as well these days (modern
detergents and all that). Note though that even cold fill only can still
knacker a shower in some cases. If you mains flow is marginal, turning
on a cold tap will reduce the available flow to the combi causing a
temperature rise in its output.

Depends on how it is piped up. And if still a problem you get a proper
combi shower mixer with integral pressure balancer, or fit an external one
on the hot and cold to the shower.

The w/machine and dishwasher can be piped up to take cold only. In reality
the amount of hot water taken from the DHW system is negligible, as most of
the water taken is cold via the DHW dead-leg pipe. Bt the time hot comes
through the appliance is near full of water anyway.

If you have a secondary circulation loop then a hot fill can save money in
energy.


Unnecessary expense and would take a very long time to recover the
cost considering that dishwashers and detergents used in them are
designed for cold fill and gradual heating, and washing machines,
detergents and clothes are also mainly warm wash only these days.


In this case, the OP would be better sorting out the pipework, getting the
combi supply dedicated back to the stop cock and piped up as I suggested,
get the appliances on cold fill, get rid of the bath, have a flow restrictor
on the sink tap (available from BES), and put in another combi for the new
ensuite. This is "probably" the most cost effective route for him. I await
his DHW demands.


In other words alter the requirements to meet the limitations of the
combi. This was not what was being requested.



--

..andy

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