It looks like you're new here. If you want to get involved, click one of these buttons!
I have a 2 zone system that has the DuroZone SMZ zone controllers. I have the 2nd zone up and running using an auxiliary 24v transformer. The 1st zone has the following wires running from the zone board to the thermostat: R, Q, W, Y, G and B. There is no C-wire but all 6 wires in the bundle are used. Is this a configuration where the PEK could be utilized?