In an earlier contribution to this discussion,
Mike Halmarack wrote:

I want to draw my house's existing and proposed plumbing layout. Some
examples would be a big help, especially when it comes to the various
valves pumps coils and heat exchangers. I'm not averse to a trip to
the library if necessary though.
TIA

I don't know how exotic you want it to be! You can find simple generic
schematics for several different control 'plans' on the Honeywell site at
http://content.honeywell.com/uk/homes/systems.htm
--
Cheers,
Roger
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