On Wed, 21 Dec 2005 15:07:14 +0000, danw
wrote:

I'm seeking advice.

Gas pipe-the main thing is,is the diameter adequate enough to pass the
correct flow rate without excessive pressure loss? if so then it
shouldnt need replaceing if its in good condition. There may be
minimal chance of dust/rust but its unlikely that this would bother
the boiler as the flow would not be at a high rate and it would not be
turbullent flow. Anyway its easy enough to put a filter on the gas
inlet if the boiler doesnt already incorporate one.

The main issue with type of boiler is water delivery rate. Now then if
you have a family house and have high water demands I'd suggest you
stick with a system boiler and cylinder. Whether that cylinder is open
vented or pressurised is up to you!.

Combi technology has improved greatly but for big family houses,they
can still be tedious.





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