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2. Defeat device - Wikipedia

   en.wikipedia.org/wiki/Defeat_device

   1995 Cadillac Seville disengaged emissions controls whenever heat or air conditioning was on. In 1995, General Motors was ordered to recall 470,000 model year 1991 through 1995 Cadillacs and pay an $11 million fine for programming the car's electronic control unit (ECU) to enrich the fuel mixture any time the car's air conditioning or cabin heat was operating, since the EPA tests are conducted ...

3. Wax thermostatic element - Wikipedia

   en.wikipedia.org/wiki/Wax_thermostatic_element

   Cooling circuits have a small bypass path even when the thermostat is closed, usually by a small hole in the thermostat. This allows enough flow of cooling water to heat the thermostat when warming up. It also provided an escape route for trapped air when first filling the system.

4. Automotive air conditioning - Wikipedia

   en.wikipedia.org/wiki/Automotive_air_conditioning

   Sustainable automotive air conditioning is the subject of a debate – also known as the Cool War – about the next-generation refrigerant in car air conditioning. An advocacy group, The Alliance for CO 2 Solutions , supports the uptake of carbon dioxide (CO 2 ) as a refrigerant in passenger cars, and the chemical industry is developing new ...

5. Forced convection - Wikipedia

   en.wikipedia.org/wiki/Forced_convection

   Forced convection is a mechanism, or type of transport, in which fluid motion is generated by an external source (like a pump, fan, suction device, etc.). Alongside natural convection , thermal radiation , and thermal conduction it is one of the methods of heat transfer and allows significant amounts of heat energy to be transported very ...

6. Air lock - Wikipedia

   en.wikipedia.org/wiki/Air_lock

   Air lock problems often occur when one is trying to recommission a system after it has been deliberately (for servicing) or accidentally emptied. Take, for example, a central heating system using a circulating pump to pump water through radiators. When filling such a system, air is trapped in the radiators. This air has to be vented using screw ...

7. Damper (flow) - Wikipedia

   en.wikipedia.org/wiki/Damper_(flow)

   Regardless of the style of damper employed, the systems are often designed so that when no thermostat is calling for air, all dampers in the system are opened. This allows air to continue to flow while the heat exchanger in a furnace cools down after a heating period completes.

8. Doctors Say This Is How You Can Loosen and Clear Mucus From ...

   www.aol.com/doctors-loosen-clear-mucus-chest...

   Studies show that keeping your head at the appropriate height—about 2 inches (or 5 centimeters) off the bed—helps air flow into the lungs and stabilizes your respiratory function. However ...

9. 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.