Honeywell manufactures both mechanical and digital thermostats that control both heating and cooling systems. The Honeywell CT87N mechanical thermostat maintains the classic round appearance while controlling both heating systems and central air conditioning units. Honeywell's various digital thermostats control heating and cooling systems and offer programmable scheduling and Wi-Fi capabilities.
Honeywell's Lyric digital thermostat provides the classic round thermostat appearance with a digital touchscreen interface. The thermostat's geo-fencing technology coordinates with the homeowner's smartphone, adjusting household heating and cooling based on location. The Lyric thermostat saves on energy while the homeowner is away, but provides comfort when he returns home. The Lyric is also controllable from any smartphone or tablet with the use of the Lyric app, providing customizable shortcuts and alert notifications.