Smart Thermostat Market Analysis Market Research Future (MRFR) estimates the global smart thermostat market to reach USD 3.5 billion at a CAGR of 23.4% from 2020 to 2027 (forecast period).  The smart thermostat is a device that automates the control of air cooling devices. It is a device that controls the HVAC system in both residential and commercial buildings. The smart...