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So, I have 3 zones and 2 tstats. I purchased a ZVC404 to clean things up.
If I want 1 tstat to call 2 zones, whats the best way to do that?
Zone valves are Honeywell V8043F.
a) jumper 2 tstats, and put each zone on its own.
b) wire zone valves in series or parallel?