Description
Honeywell TH9421C1004 Vision PRO IAQ Thermostat features 7 day programming and is designed for Up to 3 Heat/2 Cool Conventional Systems and Up to 4 Heat/2 Cool Heat Pumps.

Honeywell Vision PRO IAQ Thermostat provides electronic control of 24 Vac heating and cooling systems in addition to humidification, dehumidification and ventilation all with just 3 wires to the thermostat.. Honeywell TH9421C1004 offers you top-of-the-line features like Touchscreen interaction, a real-time clock, and a large, easy-to-read backlit display.

Features:
  • Advanced dual-fuel control
  • Three wires to the living space allows for easy equipment upgrade without having to run additional thermostat wire
  • 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
  • Removes air pollutants by exchanging the stale air in a house with fresh, filtered air better than having an open window
Read more
Manuals (2)
Specs
Application:
Heat Pump
Multi Stage (Heat/Cool)
Stages:
4 Heat/2 Cool Heat Pump
3 Heat/2 Cool
Programmability:
7 Day
Programmable
User Interface:
Touchscreen
Mount:
Horizontal
Options:
Works with Sensor
Fan Control
Auto Changeover
Large Display
Power Method:
Communicating
Changeover:
Manual
Auto
Temperature Range (F):
40°-99°F
Max Temp Differential:
1°F
Operating Humidity:
5 to 90% RH non-condensing
Voltage:
Low voltage
Amperage:
0.6-1
Wattage:
12 to 30
Wiring:
Vnt2
1
2
Rh
R
Y2
3
Rc
Y
G
C
L
Color:
Premier White
Height:
4-9/16"
Width (Inches):
6"
Depth (Inches):
1-1/4"
Wireless:
No
Humidity Control:
Yes
×
Questions?
Speak with a real person who will go out of their way to help!
1-888-757-4774
Monday – Thursday
8am–5:45pm EST
Friday
9am–4:45pm EST

3 Product Reviews

Product Q&A