I have a 4 zone system. I want to put 4 new thermostats on the system. I wish I looked at the wires before I removed them all! So dumb. Anyway..
- There is an air handler in the attic.
- A compressor outside.
- A cast iron oil boiler for the 4 loop radiant baseboards.
Would these 2 statements be correct?
Each thermostat will have 2 (18-5) wires coming out of it. One of the wires will lead up to the air handler and one of the wires will lead to the valve that opens for hot water.
Each thermostat will need a "power" wire from either the air handler or the boiler.