Honeywell Home (Resideo)
Honeywell Home evohome Base Pack (ATP921R3100)
- Wi-Fi
Verified July 2026
Still the gold standard for true 12-zone UK heating, and the built-in evohome integration is actively maintained (2026.x releases). It talks to Resideo's Total Connect Comfort cloud rather than locally, so buy it for zoning depth, not automation latency. Premium price, premium capability.
In Home Assistant
| Control | Type | What it does |
|---|---|---|
| Zone climate (up to 12) | Climate entity per zone | Target temperature per room |
| System mode | Service call (evohome.set_system_mode) | Whole-house mode such as Auto or Away — the standard preset service doesn't reliably work here |
| Hot water | Water heater entity | On/off control for domestic hot water, if fitted |
The system's climate entity for the controller itself has no real setpoint — HA fabricates one as the average of every zone's temperature, so don't automate off it directly. A confirmed open bug means once you set a non-default preset (e.g. Away) there's no way back to normal scheduling through the standard preset service — you have to call evohome.set_system_mode instead, which is also the entity worth automating: trigger a whole-house AutoWithEco setback across all 12 zones at once when the last person leaves, something only meaningful because evohome's controller genuinely governs every zone together.