Which heating and cooling systems are not compatible with ZEN Thermostat?

Please refer to the compatibility section of our website to find the most up to date compatibility list.


Works with 90% of 24V systems: gas, electric, oil, forced air, heat pump and radiant.

  • Heating: 1 and 2 stages (W1, W2)
  • Cooling: 1 and 2 stages (Y1, Y2)
  • Heat pump: with auxiliary and emergency heat (O/B,AUX, E)
  • Fan (G)
  • Power (C, Rh, Rc)
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