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2. Auto-defrost - Wikipedia

   en.wikipedia.org/wiki/Auto-defrost

   A defrost thermostat opens the heater circuit when the evaporator temperature rises above a preset temperature, 40°F (5°C) or more, thereby preventing excessive heating of the freezer compartment. The defrost timer is such that either the compressor or the defrost heater is on, but not both at the same time.

3. Freeze stat - Wikipedia

   en.wikipedia.org/wiki/Freeze_stat

   Air coil freeze stat. A freeze stat is a temperature sensing device for HVAC that monitors a heat exchanger to prevent its coils from freezing.Freeze stats can be used on both refrigerant-to-air, and refrigerant-to-liquid type heat exchangers and serve different purposes with similar goals for each.

4. Thermostat - Wikipedia

   en.wikipedia.org/wiki/Thermostat

   A thermostat exerts control by switching heating or cooling devices on or off, or by regulating the flow of a heat transfer fluid as needed, to maintain the correct temperature. A thermostat can often be the main control unit for a heating or cooling system, in applications ranging from ambient air control to automotive coolant control.

5. Wax thermostatic element - Wikipedia

   en.wikipedia.org/wiki/Wax_thermostatic_element

   This regulation is now carried out by an internal thermostat. Conveniently, both the sensing element of the thermostat and its control valve may be placed at the same location, allowing the use of a simple self-contained non-powered thermostat as the primary device for the precise control of engine temperature. [2]

6. Google Nest - Wikipedia

   en.wikipedia.org/wiki/Google_Nest

   The Nest Learning Thermostat is an electronic, programmable, and self-learning Wi-Fi-enabled thermostat that optimizes heating and cooling of homes and businesses to conserve energy. [43] It is based on a machine-learning algorithm: for the first weeks users have to regulate the thermostat in order to provide the reference data set.

7. Let L-410 Turbolet - Wikipedia

   en.wikipedia.org/wiki/Let_L-410_Turbolet

   Development of the L-410 was started during the mid-1960s by the Czechoslovak aircraft manufacturer Let Kunovice. [4] The company had decided to launch the project with awareness that the Soviet airline Aeroflot was actively seeking a turboprop-powered replacement for the Antonov An-2 biplane, which was viewed as a potentially lucrative opportunity for a suitable aircraft. [5]