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Honeywell TH9421C1004
VisionPro IAQ Programmable Thermostat, Four Stage Heat Two Stage Cool (Touchscreen) for Use with EnviraZone Networked Zoning Systems (Thermostat Only)

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The TH9421C1004 touch screen universal programmable thermostat provides electronic control of 24 Vac heating and cooling systems, in addition to humidification, dehumidification, and ventilation. This item is intended for use with Honeywell EnviraZone Networked Zoning Systems. If you're looking for the Honeywell VisionPro IAQ with equipment interface module, please see the Honeywell VisionPro IAQ YTH9421C 1002. To see which EnviraZone Networked Zoning Systems this thermostat will work with, please see the Accessories tab above.

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.

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