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  2. 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.

  3. Zone valve - Wikipedia

    en.wikipedia.org/wiki/Zone_valve

    Removal of electrical power re-closes the valve. This style of zone valve operates with a perfectly ordinary SPST thermostat. For vacuum- or pneumatically operated zone valves, the thermostat usually switches the pressure or vacuum on or off, causing a spring-loaded rubber diaphragm or ball valve to move and actuate the valve. [2]

  4. Tankless water heating - Wikipedia

    en.wikipedia.org/wiki/Tankless_water_heating

    Larger whole-house electric units may require up to AWG 2 wire. In gas appliances, both pressure and volume requirements must be met for optimum operation. Start-up delay: There may be a longer wait for hot water. A tankless water heater only heats water on demand, so idle water in the piping starts at room temperature.

  5. Thermostatic radiator valve - Wikipedia

    en.wikipedia.org/wiki/Thermostatic_radiator_valve

    A thermostatic radiator valve on position 2 (15–17 °C) Installed thermostatic radiator valve with the adjustment wheel removed A thermostatic radiator valve (TRV) is a self-regulating valve fitted to hot water heating system radiator, to control the temperature of a room by changing the flow of hot water to the radiator.

  6. Red food dye could soon be banned as FDA reviews petition ...

    www.aol.com/red-food-dye-could-soon-181649897.html

    A widely used artificial food dye could soon be outlawed. The U.S. Food and Drug Administration (FDA) is moving to ban an artificial food coloring called Red No. 3, also known as Erythrosine. The ...

  7. Meghan Markle Just Gave Herself a New Title—Here’s What We Know

    www.aol.com/lifestyle/meghan-markle-just-gave...

    After months of searching for the right person to lead her lifestyle brand, Meghan Markle has reportedly decided to take the reins herself, appointing herself CEO of American Riviera Orchard. The ...

  8. HVAC control system - Wikipedia

    en.wikipedia.org/wiki/HVAC_control_system

    The unit controllers typically have analog and digital inputs that allow measurement of the variable (temperature, humidity, or pressure) and analog and digital outputs for control of the transport medium (hot/cold water and/or steam). Digital inputs are typically (dry) contacts from a control device, and analog inputs are typically a voltage ...

  9. How a GM layoff email sent to employees triggered a storm on ...

    www.aol.com/gm-layoff-email-sent-employees...

    Adam Bernard, of Royal Oak, stands next to his 1963 Buick Riviera in June 2024 at the EyesOn Design Car Show at the Ford House, the historic home of Eleanor and Edsel Ford in Grosse Pointe Shores.

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