The headline feature, and the reason many people will turn to the W200 in the first place, is Apple’s native Adaptive Temperature support. Instead of setting a traditional 7-day schedule, Adaptive Temperature uses location data from your iPhone and Apple Watch to determine when you’re home, away, or asleep, and adjusts the thermostat accordingly. If you enable Predict Arrival, it will start preheating or precooling the house before you usually get home from work. Extended Away mode expands the setpoint range when you leave the city for a few days.
In practice, this works well, and if your schedule isn’t particularly volatile, it’s arguably a better approach than manual scheduling. It just keeps the house comfortable without you thinking about it. The tradeoff is that Apple Home’s scheduling system has some shortcomings. You can’t, for example, set night mode to start later on weekends than on weekdays. This means you’ll likely find yourself returning to the app to fill in the blanks or control the thermostat manually as needed.
Clean Energy Guidance is the other feature in iOS 26, and it’s more regional. It makes small automatic adjustments when the network is cleaner or dynamic pricing is favorable. Rate Optimization currently works with PG&E if you connect your utility account, so if you’re in California like me, it’s helpful — but again, keep in mind that adjustments will be minimal. Elsewhere, for now, it’s more of a carbon awareness boost than a bill-saving tool.
In terms of compatibility, the W200 supports most 24 VAC systems, including furnaces, air conditioners, heat pumps up to 2H/2C with 2-stage auxiliary, boilers and PTACs. It should work with most HVAC systems. What it doesn’t work is high voltage systems (110V, 120V, 240V) or proprietary communicating setups. A C wire is required, which, again, means you’ll need the $29.99 adapter if your system doesn’t have one.
The built-in mmWave radar is a smart addition. It uses technology that Aqara has developed for other devices, like its dedicated presence sensor. It detects extremely precise movements, not just obvious movements, with a range of around three meters and a field of view of 120 degrees. This means he knows you’re there even if you’re sitting on the couch, because you’ll move at least a little.
Beyond waking the screen, you can use this presence data for automations throughout the rest of your smart home, like turning on lights when you pass by, for example. It’s not as sophisticated as Aqara’s dedicated FP2 sensor, which can distinguish zones in a room, but it’s a nice plus for a thermostat – and I hope we see more features and sensors in smart home devices like switches and thermostats. It just makes sense.
The main functions of the thermostat work well. Heat, Cool, Auto and Away modes all behave exactly as expected. There are also some nice advanced touches, like a minimum compressor run time setting to avoid short cycling.
There are, however, two notable omissions. First, there is no way to set hardware temperature lock limits, which means you cannot restrict the height or height of the set point. Second, the W200 only supports one external temperature sensor at a time. No multi-room averaging or ability to select different sensors for different times of the day.