Basic

The Carrier Connect WiFi Thermostat controls up to 4 heating stages and 3 cooling stages. The thermostat can enable demand response through utility programs. It automatically retrieves time, date and outdoor air temperature when connected to Wi-Fi and sports an auto-dimming display that lights up as you approach.

The Ecobee supports up to two stages of heating and cooling for conventional systems and heat pumps. Ecobee has optional air quality monitoring, remote occupancy/temperature sensors, and HVAC accessory (ventilator, HRV). Ecobee works with demand response programs and communicates via Wi-Fi. The thermostat provides alerts for freeze protection.

The Emerson Sensi Touch Smart thermostat has a mobile app to control multiple thermostats. The thermostat connects to WiFi and support geofencing.

The Google Nest thermostat supports up to three heating/two cooling stages (conventional), and two heating/cooling stages with auxiliary heat (heat pumps). Nest learns temperature preferences to create a schedule and has an on-board occupancy sensor. Its Rush Hour Rewards program enables participation in utility demand response. Nest connects through Wi-Fi.

The Honeywell Home advanced thermostat boasts flexible scheduling: no schedule, time-based schedule, the ability to control based on occupancy (through location geo-fencing, or with additional sensors and an active-priority occupancy algorithm). The thermostat uses WiFi and has a mobile app.