In an earlier contribution to this discussion,
Ben Freeman wrote:

I've just been chatting to a loft conversion company about loft
conversions and they seem to be of the opinion that I shouldn't try
and extend my open pumped CH system to the loft - but as far as I can
see all I need to do is raise the header tank to be above the loft
rads (all be it not by much) and it should just work.

Has anyone done this - does it work efficiently?

The builder seems to favour scrapping my perfectly functional boiler
and going for a new combi sealed system - which seems to me rather
over the top.

Thanks,

Ben


You may have difficulty getting the header tank high enough to prevent the
system from pumping over - unless you've got lots of headroom above the new
living accommodation.

If your existing boiler is suitable, you could convert to a
sealed/pressurised system without having to change the boiler. Check your
boiler installation manual. [If you haven't got one, you may be able to
download one from the manufacturer's website].
--
Cheers,
Set Square
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