Thermostats

A thermostat is a regulating device which senses the temperature of a physical system and performs actions so that the system's temperature is maintained near a desired setpoint.

Thermostats are used in any device or system that heats or cools to a setpoint temperature, examples include building heating, central heating, air conditioners, HVAC systems and water heaters.

A thermostat operates as a "closed loop" control device, as it seeks to reduce the error between the desired and measured temperatures. Sometimes a thermostat combines both the sensing and control action elements of a controlled system, such as in a programmable thermostat.

The word thermostat is derived from the Greek words θερμός thermos, "hot" and στατός statos, "standing, stationary".

All electrical connections must be performed by a certified electrician.