Resideo - Honeywell Home TH109PROPLUS Thermostat

The TH109PROPLUS Thermostat by Resideo - Honeywell Home is a 240V line-voltage, digital non-programmable thermostat designed for electric heating systems. With a 4-wire configuration and an SPST switch, this white rectangular unit provides simple, reliable on/off control for baseboard heaters and electric heat strips.

Engineered for 240V AC at 50/60 Hz, it supports 2 to 12.5 Amp resistive loads and carries a power rating of 500/3000 Watt at 240V. The durable, compact housing fits standard installations (4.5" W x 1" D x 4.8" H) while offering a clean, minimal footprint in any space.

Key features:

• Voltage and power: 240V AC, 50/60 Hz; 2–12.5 Amp resistive; 500/3000 Watt
• Control and wiring: 4-wire config with SPST switch; 6" tinned copper lead wires
• Temperature specs: Operating range 32–122°F; adjustable setpoint 40–85°F
• Design and compatibility: White rectangular vertical cover; UL and CSA approvals
• Sensor: Thermistor-based sensing for reliable temperature control

Ideal for electric baseboard heating and other line-voltage installations, the TH109PROPLUS offers a straightforward, dependable solution for simple thermal control in homes and workshops.