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.

Manual/Digital Manual - Conventional dial or lever style of mechanical thermostat. It doesn’t have many features. Digital - This has a display screen and is often capable of a variety of useful functions.	Digital

Millivolt A "2-wire Millivolt" system. These are usually gas-fired wall or floor heaters that do not have forced-air blowers. In other words, they are convection heaters.	Yes

Power Method Indicates if the thermostat operates electrically on batteries or power from the furnace/air handler.	Communicating

Use with Gas/Oil Indicates that this thermostat can be used with either a gas furnace or oil furnace.	Yes

Use with Electric Furnace Indicates that this thermostat is compatible with electric furnaces or air handlers with electric heater coils. The voltage to the thermostat will be the normal 24 VAC. This feature is different from a "Line Voltage Capable" thermostat which operates with 120 to 240 VAC.	Yes

Use with Heat Pump Indicates that this thermostat is compatible with heat pumps.	Yes

Stages of Heat The number of terminals on the thermostat that can be used to individually control separate heating functions. Many furnaces that are called two stage heaters will require at least a two stage thermostat to operate appropriately. You may also choose a multiple stage thermostat when pairing different heating equipment. Such as a heat pump and a furnace.	4 w/ Heat Pump

Stages of Cool The number of terminals on the thermostat that can be used to individually control separate cooling functions. Some of the higher efficiency air conditioners and heat pumps are designed to use multiple stages of cooling.	2

Programming Days The number days per week that the thermostat will be able to individually program. Ex. a 5,1,1 programmable thermostat will have the same program settings on Monday-Friday and will be able to individualize the programming on Saturday and Sunday. A 7 day programmable thermostat will be able to set a different programming schedule for each day of the week.	7

Programmable Fan Allows for you to establish by schedule when you want your furnace/air handler fan to turn on and off automatically to circulate home air, even without your furnace or air conditioner operating.	Yes

Resume / Adaptive Intelligent Recovery Capability Brings the room temperature back to the programmed temperature at the set time, even when you may have manually over-ridden the program in the interim which will maximize comfort and energy savings.	Yes

ENERGY STAR® Qualified Products earn the ENERGY STAR label by meeting the energy efficiency requirements set forth in ENERGY STAR specifications. The EPA establishes these specifications based on the following set of principles: Product categories must contribute significant energy savings nationwide. Qualified products must deliver the features and performance demanded by consumers, in addition to increased energy efficiency. If the qualified product costs more than a conventional, less-efficient counterpart, purchasers will recover their investment in increased energy efficiency through utility bill savings, within a reasonable period of time. Energy efficiency can be achieved through broadly available, non-proprietary technologies offered by multiple manufacturers. Product energy consumption and performance can be measured and verified with testing. Labeling would effectively differentiate products and be visible for purchasers.	Yes

Backlit Display Allows easier viewing of disply screen in the dark.	Yes

Outdoor Temperature Sensor Capability When used with an outdoor air sensor, this features allows the thermostat to sense the outdoor temperature and indicate such on the screen. Also allows some thermostats to automatically decide whether to heat or cool the home based on outside temperatures.	Yes

Indoor Temperature Sensing Capability Some thermostats provide for wiring to an accessory called an indoor sensor. The indoor sensor mounts in the home living space away from the thermostat, and tells the thermostat what the temperature is in that area. The thermostat will then use the temperature from the sensor to indicate the home's current comfort level, instead of just the temperature near the thermostat.	Yes

Auto Changeover This feature allows the thermostat to automatically switch from heating to cooling based on the temperature inside. This is useful between seasons when heating may be needed at night, and cooling during the day.	Yes

Memory Back-Up Having this feature will store your set temperature or temperature schedule. In the event of a power failure, you won't have to reprogram the thermostat when the power returns.	Yes

Filter Indication Reminds you that it's time to change your furnace or air handler filter.	Yes

Humidifier Panel Indication Reminds you that it's time to change your humidifier pad, which is normally done so annually.	Yes

Humidity Control Allows you to control your whole-house humidifier from your thermostat.	Yes

Vacation Hold Allows you to program your thermostat to operate your heating/cooling system at a minimum when you leave on vacation (to save money), and then automatically return the temperature to a normal comfort setting just before you arrive home. Having this capability will mean that when you return, your house will be nice and comfortable.	Yes

Keypad Lockout Indicates that you may select to allow only individuals who have a numeric code (which you create) to change the temperature or settings on the thermostat. This feature is useful for thermostats located in public spaces, or to keep children from operating the thermostat.	Yes

Color	White

Width	6 Inches

Depth	1 1/4 Inches

Height	4 9/16 Inches

Limited Warranty	5 Years