"Peter Smithson" wrote in message
...
In article ,
says...

Another question - more than one of the people coming to give a quote
have said that a wall mounted boiler isn't going to work with their
single pipe CH and gravity HW system. They currently have a free
standing one. Any ideas why some quotes are saying that?

The single pipe system will still work, but they inefficient and are
best
replaced. They are ca pig to get right after a boiler change. Having
rad
valves with them can also upset the performance too. Also the same with
gravity hot water. Modern small capacity boilers require a minimum
flow at
a all times, so a pump is required at all times.

So it's really a matter of having to have a pumped HW system with modern
systems rather than a certain kind of modern boiler. Odd that the chap
said he could do gravity with a floor standing boiler but not a wall
mounted one!!!

Ideal still do a cast iron floor mounted boiler, which when the new regs
come in will be discontinued as it will be too inefficient. Changing from
gravity to fully pumped is not a big thing an much more efficient too.


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