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2. Bang–bang control - Wikipedia

   en.wikipedia.org/wiki/Bang–bang_control

   A water heater that maintains desired temperature by turning the applied power on and off (as opposed to continuously varying electrical voltage or current) based on temperature feedback is an example application of bang–bang control. Although the applied power switches from one discrete state to another, the water temperature will remain ...

3. Time switch - Wikipedia

   en.wikipedia.org/wiki/Time_switch

   A time switch (also called a timer switch, or simply timer) is a device that operates an electric switch controlled by a timer. Intermatic introduced its first time switch in 1945, which was used for "electric signs, store window lighting, apartment hall lights, stokers, and oil and gas burners."

4. HVAC control system - Wikipedia

   en.wikipedia.org/wiki/HVAC_control_system

   HVAC (Heating, Ventilation and Air Conditioning) equipment needs a control system to regulate the operation of a heating and/or air conditioning system. [1] Usually a sensing device is used to compare the actual state (e.g. temperature) with a target state. Then the control system draws a conclusion what action has to be taken (e.g. start the ...

5. Water timer - Wikipedia

   en.wikipedia.org/wiki/Water_timer

   The solenoid type uses no gears and makes a tapping sound when the solenoid is activated. Battery powered garden hose timers are the most commonly seen water timers and are seen in two types, the ball valve timer that is actuated by a motor with gears, and the diaphragm timer that is actuated by a solenoid.

6. After a slow start, flu season is picking up steam - AOL

   www.aol.com/slow-start-flu-season-picking...

   December 27, 2024 at 2:10 PM Just under 42% of adults have gotten a flu shot so far this season, according to the CDC. The flu is ramping up after a slow start to the season.

7. Cold weather forecasts for January spark a 24% surge in ...

   www.aol.com/cold-weather-forecasts-january-spark...

   Natural gas futures surged 24% with a cold spell expected across the eastern half of the US. Forecasts call for below-average temperatures on the East Coast and parts of the Midwest for January.