Honeywell Home evohome THR99C3102 - 12-Zone Heating Control

Honeywell Home evohome THR99C3102 is a wireless zonal heating control system built around a central controller, radiator thermostats, and connected heating hardware. Its control range runs from 5 C to 35 C, while the system documentation lists measurement accuracy of 0.5 C.

Room By Room Heating Control

The system can manage up to 12 individual heating zones from one controller. That separates evohome from a single-zone thermostat, which generally coordinates one heating circuit rather than assigning independent schedules to multiple rooms.

The THR99C3102 configuration uses Wi-Fi-connected control and wireless radiator hardware. Its documented package contents include one central control unit, two AA HR6 Ni-MH rechargeable batteries, a table stand, a power supply, and two electronic radiator thermostats designated THR092HRT.

Controls, Compatibility, And Limits

The controller uses a backlit display and supports weekly programming. A technical listing specifies wireless operation, an external sensor, 230 V AC power for the supplied adapter, and two AA 1.5 V DC batteries for the controller.

Compatibility is tied to the heating installation rather than to the controller alone. The system documentation covers radiator control, underfloor heating, zone valves, mixing valves, boilers, heat pumps, and domestic hot-water equipment, with the required relay and interface components depending on the installation.

Compared with a single-zone connected thermostat pack, evohome offers more granular room control but requires more components and setup. That makes the THR99C3102 a better fit for homes with several separately managed rooms than for a compact installation needing one central temperature setting.

Position In The Category

Honeywell Home evohome THR99C3102 sits in the wireless multi-zone heating-control category, not the basic single-room thermostat category. The 12-zone ceiling, 5 C to 35 C setting range, and 0.5 C measurement accuracy define its technical profile, while the multi-component package increases installation complexity.