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thermostat, device to detect temperature changes for the purpose of maintaining the temperature of an enclosed area essentially constant. In a system including relays, valves, switches, etc., the thermostat generates signals, usually electrical, when the temperature exceeds or falls below the desired value.

A mechanical thermostat uses two strips of metal, laminated together in what's called a bimetallic strip in the thermostat's sensor. As the temperature of the house goes up and down the two different types of metal expand and contract, and this switches the electric circuit connected to your heating system on and off.

Sometimes a thermostat combines both the sensing and control action elements of a controlled system, such as in an automotive thermostat.

The thermostat is a piece of equipment, such as a dial or keypad placed on a wall inside your home, usually located in a hallway or another area that doesn't get direct sunlight. The thermostat displays the current indoor temperature and uses this information to turn your HVAC system on and off.

Non-programmable, programmable, Wi-Fi and smart.

Our 24-volt thermostat options are used to control a variety of heating and cooling systems. Most commonly used in central systems, these standard thermostats are flexible enough to work with a variety of applications. They are available with digital displays, touch controls, and even Wi-Fi.

24V AC

The Energy Saving Trust recommends heating your home to between 18 to 21 degrees Celsius during winter. And The World Health Organisation (WHO) suggests 18 degrees is the ideal temperature for healthy and well-dressed people. Both agree this is also the ideal temperature for sleeping.

While everyone has a different tolerance to cold, ideal winter heat settings should generally be at or above 63 °F (17 °C). Excessive cold (anything below 62 °F or 16 °C) in your home can actually raise your blood pressure as your blood “thickens” in the chilly temperatures.

Active solar heating may be the most efficient option for heating your home.

Mark Honeywell

Every air conditioning system (also called a cooling system, or AC) must have a thermostat.