[Shop-talk] A different kind of Multi zone heating

[Randall]

> I didn't want to hijack the previous thread, so I am starting 
> my own.  We live in a 95 year old house with hot water 
> radiator heat.  I know that in other countries you can 
> replace the radiator shut off valves with thermostatically 
> controlled one, creating room by room zones.

One thing you need to check out first is whether the radiators are plumbed
in series or parallel; or a combination.  The one I lived in had the
radiators in series, so that shutting off one radiator would stop all of
them (and likely cause serious problems with the pump).

As mentioned, there are lots of hits with Google; here's one that might be
suitable
http://www.pexsupply.com/product_dtl.asp?pID=10861&brand=Honeywell&cID=411

Randall