| Supply Voltage | 120 Vac; 208 Vac; 240 Vac; 277 Vac |
| Frequency | 60 Hz |
| Electrical Connections | 6 in. (150 mm) copper leadwires, suitable for connecting to aluminum wiring if approved CO/ALR solderless connectors are used. |
| Electrical Ratings | Non-inductive resistive 22A at 120/208/240 Vac. 19A at 277 Vac. |
| Ambient Temperature | 50 F to 80 F |
| Mounting | Vertical |
| Application | Electric baseboards, convectors and fan forced heaters (resistive rated loads). |
| Includes | Thermometer, range strops, locking cover screws, Positive Off |
| Dimensions | 4 1/2 in. high x 2 7/8 in. wide x 2 5/8 in. deep |
| UL | Listed; File No. E4436, Guide No. XAPX |
| CSA | Listed: File No. LR1322 |
| Hazmat Information | UN 2037, RECEPTACLES, SMALL, CONTAINING GAS, 2.1 - Limited Quantity |
| Stages | 1 Heat |
| Color | Premier White® |
| Sensor Element | Vapor filled dual diaphragm |
| Differential Temperature (F) | 2 F |
| Switching Action | DPST |
| Setting Temperature Range (F) | 50 F to 80 F |
| External Sensors Available | Outdoor Sensor optional |
Description
The T4398B1029 is a non-programmable thermostat from Resideo (Honeywell Home), heat-only.
A non-programmable thermostat holds one setpoint until someone changes it. That is the whole design, and it is the right design more often than the market admits: in a shop, a rental, a spare room or anywhere occupancy has no schedule, a programmable stat gets overridden permanently within a week and then behaves like this one with extra steps.
This is a line-voltage thermostat for electric resistance heat. It carries the heater current itself rather than switching a 24 V control circuit, and it is not interchangeable with a low-voltage stat.
Where it hangs decides what it reads. A thermostat measures the air touching it and nothing else, so an interior wall about five feet up, out of direct sun, away from supply registers and doorway drafts, and clear of the back of a wall carrying hot water or flue pipe. Most complaints that a stat is “off by three degrees” are placement, not calibration — the stat is reading the truth about a spot nobody lives in.
Confirm the system type before ordering — low voltage, line voltage and millivolt thermostats look similar and are not interchangeable.
- Brand: Resideo (Honeywell Home)
- Manufacturer Part #: T4398B1029/U
- Type: Non-programmable thermostat
- Stages: Heat-only
- System: Line voltage
- UPC: 085267088459
- Category: Thermostats