SmartZone by ECOJAY is the best zone control panel available. Control 2 to 20 zones with the SmartZone-2X & SmartZone-4X. Any standard 24VAC controlled equipment can be used (Gas/Electric/Heat Pump/Dual Fuel). SmartZone controls up to 3 stages of heat and 2 stages of cooling based on supply temperature with included supply temp sensor. Easy to use and install, the SmartZone is a perfect upgrade or drop-in replacement for your old system since it works with virtually any thermostat & damper. Try a SmartZone & you'll never want to use any other zoning system.