Honeywell Thermostat T4398A1021 110V, In-Line, Tradeline

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High Performance Electric Heat Thermostats provide precise line voltage control of resistive-rated electric heating equipment.
For control of resistance-rated baseboard electric heaters. Vapor-filled dual-diaphragm sensing element provides accurate temperature sensitivity.
Extremely sensitive to temperature changes. Replace virtually all standard wall-mounted line voltage thermostats.
Color-coded leads allow easy installation. Include long-lasting Micro SwitchTM mechanism.
Rugged, plastic mounting base. Well suited for upgrades and high-end new construction.


For precise line voltage control of resistance-rate heating equipment. Includes cover thermometer, temperature range stops and locking cover. Rugged, molded thermoplastic mounting base. Application- Electric baseboards, convectors and fan forced heaters (resistive rated loads) Dimensions (in.)4 1/2 in. high x 2 7/8 in. wide x 2 5/8 in. deep Dimensions (mm)115 mm high x 73 mm wide x 67 mm deep Includes Thermometer, range stops and locking cover screws Mounting- Vertical Electrical Ratings- Non-inductive resistive 22A at 120/208/240 Vac. 19A at 277 Vac. Frequency- 60 Hz Stages-1 Heat Tradeline Value- Tradeline Electrical Connections- 6 in. (150 mm) copper lead wires, suitable for connecting to aluminum wiring if approved CO/ALR solder-less connectors are used. Supply Voltage120 Vac; 208 Vac; 240 Vac; 277 Vac Sensor Element- Vapor filled dual diaphragm Accuracy- (C)1 C Differential Temperature (F)2 F Differential Temperature (C)1 C Color- Premier White Ambient Temperature Range (F)50 F to 80 F Ambient Temperature Range (C)10 C to 25 C Switching Action- SPST Setting Temperature Range (F)50 F to 80 F