Description
The Honeywell TH9421C1004 VisionPRO IAQ thermostat is a premium programmable touchscreen thermostat that provides precise comfort control for complex HVAC systems, including up to 4 stages of heating and 2 stages of cooling for heat pumps, and 3 heat/2 cool conventional systems.
Technical Specifications
| Condition |
New/Never Used Surplus |
| Brand |
Honeywell |
| Category |
|
| Part Number |
TH9421C1004 |
| Subcategory |
Thermostat |
| Series |
VisionPRO IAQ |
| Application |
Multi-Stage (3 Heat/2 Cool Conventional, 4 Heat/2 Cool HP) |
| Programmability |
7-Day |
| User Interface |
Touchscreen (10 sq-in universal display) |
| Power Source |
Communicating (20–30 VAC) |
| Mounting Type |
Horizontal |
| Humidity Control |
Yes (10–60% RH humidification, 40–80% RH dehumidification) |
| Temperature Settings |
Heating: 40–90°F, Cooling: 60–99°F |
| Differential Temperature |
±1°F |
| Changeover |
Auto / Manual |
| Fan Control |
Auto / On / Circulate |
| Power Rating |
12 to 30 W |
| Amperage Rating |
0.6 to 1 A |
| Frequency |
50/60 Hz |
| Voltage Rating |
20 to 30 VAC |
| Humidity Range |
5 to 90% RH (non-condensing) |
| Sensing Element |
Thermistor |
| Dimensions (HxWxD) |
4-9/16" × 6" × 1-1/4" |
| Color |
Premier White |
| Wiring Terminals |
1, 2, 3, C, RH, R, RC, Y, Y2, G, L, Vnt2 |
| Wireless |
No |
| Battery Info |
Lithium metal (contained in equipment) |
| Weight |
3.00 lbs |
Information About TH9421C1004
The TH9421C1004 is ideal for residential and light commercial applications requiring advanced climate control with minimal wiring. It features dual-fuel control for heat pump systems, built-in humidity control, and compatibility with indoor air quality devices. The touchscreen interface enhances user experience, and the unit supports both automatic and manual changeover. Its programming capability allows for 7-day custom schedules, making it suitable for varying daily needs. The thermostat contributes to energy efficiency while improving occupant comfort and indoor air quality.
Key Features:
- Advanced Dual-Fuel Control: Automatically manages heat pump and backup heat sources for maximum efficiency.
- Touchscreen Interface: Large 10 sq-in backlit touchscreen for intuitive control and programming.
- Three-Wire Installation: Simplifies upgrades and retrofits by reducing wiring requirements.
- IAQ Integration: Manages temperature, humidity, and ventilation from one interface.
- Auto Changeover: Switches between heating and cooling modes as needed.
- Real-Time Clock: Maintains time during power failures for accurate scheduling.
- Humidity Management: Supports 10–60% RH humidification and 40–80% RH dehumidification ranges.
- Clean Air Ventilation: Facilitates air exchange to remove indoor pollutants effectively.
- Energy Efficient Scheduling: 7-day programming for customized energy savings.
- Premier White Design: Clean, modern appearance blends with residential décor.
