• Controls four zones.
  • Zone4 damper can be used as fresh air damper.  Timer on panel sets minutes of fresh air per hour.
  • Two-stage heating and two-stage cooling for gas/electric systems and three-stage heating and two-stage cooling for heat pump systems.
  • Compatible with gas/electric, oil, electric and hydronic systems and both conventional and dual fuel heat pumps.
  • Optional supply air temperature sensor used to limit supply air temperature and prevent over-heating and freeze-up.
  • Maximum and minimum supply air temperatures can be set on panel.
  • Optional outdoor air temperature sensor to limit use of second stage heating in moderate weather.
  • Optional outdoor air temperature sensor used with dual fuel heat pumps to control switch-over to fossil fuel heating without the use of external thermostats or relays.
  • Compatible with low cost, heat-cool thermostats.
  • Compatible with automatic change-over thermostats allowing any zone to call for heating or cooling.
  • Second and third stage controlled by timer and timer can be set on the panel.
  • Heat pump thermostat can be used in Zone1 for emergency heat control.
  • Optional purge cycle at the end of heating or cooling call.
  • Limit use of second stage heating and cooling when less than half the zones are calling.
  • One-Zone operation eliminates resetting all thermostats when going on vacation.  All dampers and HVAC system are controlled by the Zone1 thermostat.
  • Compatible with most 24VAC powered, battery powered or power robbing thermostats.
  • Compatible with DuroZone zoning dampers models RD, MB and MS.
  • Automatic Contractor Test checks all wiring, dampers, thermostats and the HVAC system.