How does it cool the air and remove moisture? As this heat is exhausted, the refrigerant becomes cool again and flows back into your home through the evaporator which causes the refrigerant to expand back into a liquid and consequently become very cold. Air is pulled into the unit through an intake vent which is protected by a filter and that air flows over coils that are filled with refrigerant that cools the air. Thermostat Settings to Save on Winter Heating, 4 Telltale Signs Your Building Needs an HVAC Replacement. Air conditioners are heat exchangers. ( an ac which heats and cools) You may be wondering where all the heat goes. Re-circulating air already inside your vehicle's cabin can help quickly cool down your car - far faster than fresh air pulled into the cabin. That quick relief from the summer's sweltering heat makes it the first choice for drivers in the know. This air is then blown back into the home via a fan so that the house slowly cools down. While air conditioners are fairly energy-intensive, their exact energy usage depends on several factors. It flows through the coils to the outside unit where the compressor and condenser coils cool down the refrigerant by dispersing the heat. Because air conditioners are so complicated, regular maintenance is a necessity to keep the device running and working efficiently. Thus, it's sapped of oxygen and filled with moisture. The truth is that most air conditioners do not pull air from outside. A clogged cabin air filter can damage your car's blower motor and cause your AC to run longer and harder in the summer. When the air conditioning system is switched on, the gas travels to a condenser. If that setting is set to inside/ Cabin Air (recirculation) you are not getting air from outside, instead you are just recirculating air within the passenger cabin. Does my air conditioner take in outside air? Inside Air Mode ? When you're running the heat, the air from outside the vehicle must pass through the “heater core” in order to transfer the warmth to the passenger compartment. like for hay fever or i dunno.. if the air outside has radiation in it if you put the ac on will it take air from outsier and put it in the house? However, the AC is powered by your engine – the serpentine belt that runs your alternator, water pump, power steering pump and other accessories also turns the pulley for the AC compressor/clutch. AC systems work – not by cooling something directly – but by transferring heat from one place to another. Also, a/c installation can be tricky. At no time does outdoor air get pulled into your home. What's the Difference. Many more recent models have automatic systems with sensors that monitor in-cabin moisture and oxygen levels, switching between the recirculating and fresh air modes for you. Originally Answered: Where do car air conditioner get the air from? 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