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2. 6 things you should do to make sure your air conditioner is ...

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   If you use window units, make sure the air conditioner is clean and installed properly. When an air conditioning unit or system is working in tip top shape, you might forget to even think about it ...

3. Is your air conditioner making you sick? Experts unpack 'air ...

   www.aol.com/lifestyle/air-conditioner-making...

   Have your air-conditioning system serviced according to the manufacturer’s instructions. Some types of filters, for example, are designed to be disposable, while others are designed to be reused.

4. Heating, ventilation, and air conditioning - Wikipedia

   en.wikipedia.org/wiki/Heating,_ventilation,_and...

   An air conditioning system, or a standalone air conditioner, provides cooling and/or humidity control for all or part of a building. Air conditioned buildings often have sealed windows, because open windows would work against the system intended to maintain constant indoor air conditions.

5. Subcooling - Wikipedia

   en.wikipedia.org/wiki/Subcooling

   Subcooling is normally used so that when the refrigerant reaches the thermostatic expansion valve, all of it is in its liquid form, thus allowing the valve to work properly. If gas reaches the expansion valve a series of unwanted phenomena may occur. [ 3 ]

6. Thermostat - Wikipedia

   en.wikipedia.org/wiki/Thermostat

   A pneumatic thermostat is a thermostat that controls a heating or cooling system via a series of air-filled control tubes. This "control air" system responds to the pressure changes (due to temperature) in the control tube to activate heating or cooling when required.

7. 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 ...