New advanced zoning control system using the EnviraCom™ communications protocol. The most advanced and easiest to install zoning system in the industry. New control algorithm reduces and regulates plant cycles, decreases damper cycles, and increases efficiency. The Networked Zoning System Kit contains: (1) Honeywell W8835A 1004 Zoning Panel, (1) Honeywell C7835A1009 Discharge Air Temperature Sensor, (1) plate-mounted transformer, and (2) Honeywell VisionPro IAQ Zone Thermostats. One additional zone may be handled by adding one additional Honeywell TH9421C1004 VisionPro IAQ or Honeywell TH5320C1002 FocusPro thermostat. This system can also utilize the Honeywell C7089U 1006 Outdoor Temperature Sensor when installed with the Honeywell 50022037 Outdoor Sensor Interface Module- both sold seperately. (Please see "Accessories" tab above.)

Zone Panel Features

• Expandable to nine zones with additional W8703 Damper Interface Modules and Thermostats.
• Compatible with conventional gas, oil, electric or heat pump systems up to 3H/2C.
• Unsurpassed ease-of-wiring with only three wires to connect between devices.
• True communicating system using standard thermostat wire.  (Note: You cannot control thermostats in other zones from the Zone 1 thermostat.)
• Networked zoning enables these features: Time synchronization, Shared-filter indication, and Outdoor temperature display in all zones with only one C7089B Outdoor Temperature Sensor connected.
• Vacation Hold in all zones with VisionPro IAQ thermostat.
• Seven day programming in all zones with VisionPro IAQ thermostat.
• Selectable high and low equipment protection settings.
• Adjustable stage timing.
• Adjustable purge timing and damper positions.
• Single network can use up to nine T8665A Thermostats and two W8703 Damper Interface Modules to control nine zones.
• Telephone access when used with optional W8735B Telephone Access Modules.
• Uses Zone of Greatest Demand Intelligence.
• Allows use of EnviraCom furnace board or traditional furnace boards.
• Optional use of two transformers for power when many dampers are needed.

VisionPro IAQ Features

• Contains all features of standard VisionPRO, except arm chair programming.
• Thermostat connects with Equipment Interface Module or EnviraZone panel to control temperature, humidification, dehumidification and ventilation from a single point in the home.
• Automatically raises humidity levels throughout all rooms in the home, moisturizing air to prevent symptoms of dryness and to protect hardwood flooring and woodwork.
• Automatically lowers humidity levels through al rooms in the home, utilizing air conditioning or a whole house dehumidifier to prevent dampness, stickiness or odors; symptoms often associated with air that is too moist.
• Removes air pollutants by exchanging the stale air in a house with fresh, filtered air better than having an open window.

Discharge Air Temperature Sensor Features

• When mounted in supply air duct, DATS senses delivered air temperature and cuts off heating or cooling when delivered air temperature goes above or below normal operating limits.
• Requires three wires.
• Uses standard 18-22 gauge thermostat wire.