Honeywell and Resideo
Honeywell is an old, established name in thermostats. The American company was founded in 1906 and the Honeywell Round is an iconic design still sold today.
Honeywell has kept pace with smart thermostat competition. One of their early products was the RTH9580WF, which boasted a large, colorful screen and WiFi connectivity. In 2018, Honeywell spun off its home business into Resideo, a new publicly-traded company (REZI).
Current Honeywell models
The Honeywell T9 is the most modern-feeling thermostat in Honeywell’s lineup. It offers support for a variety of HVAC configurations and accessories, and it comes with a room temperature sensor that can be used to prioritize comfort in a certain part of your home.