Programmable Thermostat

This low-voltage, non-programmable heat-only thermostat is engineered for reliable temperature control in residential and light commercial heating applications. Compatible with 24 Vac, 24 Vdc, or millivolt power systems, it serves as a dependable replacement for the Resideo TH135-01-B and functionally equivalent models. The thermostat maintains a setpoint temperature range of 40 Degrees F to 85 Degrees F with exceptional accuracy of +/-1 Degrees F and a 1 Degrees F differential, ensuring precise climate management. Featuring an easy-to-read LCD display that shows room temperature in 0.1 Degrees C or 0.1 Degrees F increments, operators can quickly verify heating status and make adjustments as needed. The unit cycles 3 to 4 times per hour for optimal comfort and energy efficiency. Built with a thermistor-based sensing element, this thermostat delivers consistent performance across varying ambient conditions. The compact white housing, measuring approximately 3.1 inches in height and length, fits standard wall-mounted installation in tight spaces. Wired connections use R and W terminals for straightforward integration with existing heating systems. Ideal for retrofitting legacy HVAC systems or upgrading older thermostats, this heat-only controller provides the simplicity and reliability required in facilities where sophisticated programming is unnecessary. Suitable for boiler heating, baseboard heating, and forced-air furnace applications.