mrinheart wrote:Are there any newer programmable Thermostats certified for the ST-2C zone controller? I see the list of Thermostats that was given dates back from 2010. I would like a more modern looking Thermo with the programmable features.
I have a EWC-ST-2D panel with conventional gas forced hot air system with AC, no heat pump. I'm using 5-2 programmable Honeywell RTHL2310B1008 which has separate O and B terminals (available from Lowes for $24.98) as the Zone 1 t-stat and an old round mercury t-stat for zone 2. Seems to work fine for heating and cooling. Either t-stat kicks on and turns off the heat or AC and duct motors direct flow to zone 1 or 2 accordingly. Will probably also swap out the mercury t-stat for a second RTHL2310B1008 for zone 2.