Honeywell Home’s T9 smart thermostat gets HomeKit support, finally

The Honeywell Home T9 smart thermostat will now work with Siri and Apple HomeKit. | Photo by Dan Seifert / The Verge

The Honeywell Home T9, Resideo’s first consumer thermostat to support remote temperature sensors, has finally brought a long-promised feature to its users: HomeKit.

The brand, which is licensed by Resideo and spun out of Honeywell in 2018, already has support for Apple’s smart home system in its T5 thermostat, also known as Lyric T5, but that device doesn’t have external sensors. Sensors can help make sure you’re comfortable in the room you’re in, rather than just maintaining the desired temperature where the thermostat is.

As Verge editor Dan Seifert wrote in his review of the Honeywell T9, its sensors are very good and able to measure humidity in addition to temperature, something neither Nest nor Ecobee’s remote sensors can do. They...