WT101 / WT102

Smart radiator thermostat — for individual radiators with thermostatic valves (TRVs). Best for hotels, residential, offices with radiator heating.

WT201 / WT211

Smart thermostat for 24VAC HVAC — heat pumps, furnaces, boilers, AHU, PTAC. For buildings with central HVAC systems.

WT301 / WT303 / WT304

Smart fan coil thermostat — for FCUs (fan coil units), 2-pipe or 4-pipe, on/off or 0–10V proportional valve, 3-speed or EC fan.

WT401

Wireless split-unit thermostat — unmatched installation flexibility, works without fixed wiring to the HVAC unit.

Control

Per-radiator temperature setpoint, scheduling (up to 16 heating plans)

EPBD compliance

Designed to help meet EU Energy Performance of Buildings Directive (EPBD) requirements for individual room temperature control

Energy harvesting

Some models include energy harvesting capability

Integration

Links with EM300-TH zone sensors for accurate room temperature input, and with WS301 window/door contacts to stop heating when windows open

Use cases

Hotels (pre-heating before check-in, setback when vacant), offices, residential buildings with radiator heating

Compatible systems

Heat pumps, furnaces, boilers, AHU, PTAC, air conditioning (24VAC systems)

Modes

Heat, Cool, Auto, Emergency Heat, Fan (Auto/On)

Heating stages

Up to 4 stages heating, 2 stages cooling + emergency heat

Temperature input

Supports up to 5 EM300-TH zone sensors via D2D for accurate room-level control

Data storage

Up to 1000 records — retransmits on reconnect

BMS protocols

MQTT(S), HTTP, BACnet via Milesight IoT Cloud or gateway

Use cases

Commercial office buildings, hotels with central HVAC, mixed heating/cooling systems

Compatible FCU types

2-pipe or 4-pipe, on/off valve or 0–10V proportional valve, 3-speed fan or EC fan

WT303/WT304

Next generation of WT301/WT302 — extends to 4-pipe FCUs, EC fans, more complex scheduling (8 plans × 16 time slots)

Key card integration

Key card input — room switches to Comfort mode when card inserted, ECO mode when removed (hotel energy saving)

Temperature modes

3 control modes, 4 fan speed modes

Local control

LCD screen and touch buttons for in-room control

Use cases

Hotels (energy saving via key card), commercial offices, serviced apartments, any building with FCU climate control

Power

Multiple power supply options (mains or battery)

Use cases

Situations where wiring to the HVAC unit is impractical, retrofit installations, accessible areas requiring separate thermostat placement