Aqara
Aqara Floor Heating Thermostat W500
- Zigbee
- Thread
- Matter
Verified September 2026
The rare underfloor-heating pick that speaks Thread/Matter locally, no Aqara hub required — a wired 230V thermostat switching up to 16A electric UFH (or 2-wire NC hydronic actuators) with an included NTC floor probe. This is an electric-UFH specialist, not a radiator thermostat swap: budget an electrician's time, since it wires into Live/Neutral/Load at the backplate rather than clipping onto an existing 2-wire stat. At £69.99 it undercuts the hub-based Heatmiser neoStat Pro (£127.52 plus a ~£117 neoHub) by a wide margin for a single zone, but Heatmiser's screed floor-limit logic and 32-zone hub scale further if you're wiring more than one room.
In Home Assistant
| Control | Type | What it does |
|---|---|---|
| HVAC mode | Select | Off/heat only via the Matter thermostat cluster — no cool or auto states, consistent with a dedicated UFH stat. |
| Current temperature | Sensor | Single value driven by whichever probe (NTC floor sensor by default) the device is locally set to reference for control; floor and air readings aren't surfaced as separate entities. |
| Target temperature | Number | Setpoint write via the Matter cluster; applies locally without an Aqara hub or cloud round-trip. |
| Preset mode | Unsupported | Generic Matter thermostat support in HA drops presets for most third-party Matter stats, so eco/schedule presets configured in the Aqara app are invisible to HA automations. |
| HVAC action | Sensor | Idle vs heating state — the more reliable signal for UFH automations than comparing target vs current temperature, given the slow thermal lag of embedded floor loops. |
Home Assistant's Matter integration exposes the W500 as a heat-only climate entity, but preset mode support is generally dropped for third-party Matter thermostats in HA, so eco/schedule presets set in the Aqara app won't show up as selectable HA presets. There's no mechanism to split the NTC floor probe from an air reading into two entities — current temperature reflects whichever probe the device is locally configured to reference, a gap already reported for other floor-heating stats where HA can't expose dual sensor feeds. Aqara's own community forum has an open thread of Thread-connected W500 units reporting implausible temperature spikes, suspected to be Thread radio coverage rather than an HA bug; some users have fallen back to Zigbee2MQTT, which added native support and is currently the more stable pairing path if Thread proves flaky.
Specs
- power
- 220-250V AC mains, 50/60Hz (wired) — Live/Neutral, or 2-wire 230V normally-closed (NC) actuator control
- display
- LCD screen, 55 x 73mm faceplate window (50 x 70mm active display area)
- max load
- 16A / 3600W (resistive)
- mounting
- 86mm or EU round wall box, screw kit included
- dimensions
- 86 x 86 x 45mm faceplate; 244g
- floor sensor
- NTC probe included; also takes built-in ambient sensor or a paired Aqara climate sensor as the reference source
- operating range
- 0-40°C, 0-90% RH non-condensing