Honeywell - Kit for conventional, heat pump or dual-fuel applications expandable up to 32 zones (3 heat/2 cool). Intuitive installer setup. Easy-to-follow, digital display uses real language to guide installer through four easy steps. Standard checkout procedure. Robust push terminals. Variable-speed fan control. Discharge air temperature staging. Advanced dual-fuel operation. Use with TAZ-4 Add-A-Zone to expand to 32 zones. RedLINK enabled for up to four wireless zones when used with THM4000R1000 wireless adapter. Controls up to 3 heat/2 cool, conventional or heat pump. Controls up to two stages compressor and two stages fossil fuel in dual fuel mode. Heat pump compatible. Includes HZ432 zone control panel, AT140 transformer, C7735A discharge air temperature sensor.