The first residential thermostat was first deployed in the year 1500 and since then it has evolved and progressed, usually through advances made in famous companies such as Johnson Controls and Honeywell. At the turn of the century, America saw the introduction of advanced controls for humidity, multizone environments and voice activation. The latest range of SMART devices connect to the Internet cloud and offer a range of personalization features. Even remote-control versions have become popular in recent times.

The latest advances in thermostat technology are focused on finding ways to save the homeowner money in terms of energy cost. These programmable versions, while powerful, can make also make diagnostics and repair challenging depending on the specifications put forward by the manufacturer. HVAC companies include thermostat installation and configuration during the install of a new central AC unit.