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Do Air Conditioners Bring in Fresh Air From Outside?

Air conditioners serve the primary purpose of cleaning the air inside our homes. With the onset of winter months, most people are confined inside their houses for the better part of the day. Due to breathing and sweating, plus the heat produced by heaters, the air inside the houses gets so warm and this is where the air conditioners come in; to cool off the air when the inside of the house is hot and warm it when it becomes too cold. Most people are never bothered by how their air conditioners works and this leads to the fallacy that air conditioners bring air from outside. Air conditioners have a compressor cycle that functions just like a fridge to lose heat out of your house. The compressor cycle relies on different components that include a compressor, refrigerant, evaporator, condenser, and an expansion valve.

  • Compressor
Air Conditioner Heat Pump Repair

The compressor component of an air conditioner picks up the refrigerant and compresses it. Since temperatures rise with the rise in pressure, the refrigerant is heated. To cool off the air in your house, the refrigerant needs to be cooled off, and that is why the compressor pumps out hot refrigerant to the condenser where it is changed back into a liquid state. The compressor is the part located outside your house and this is where the compressed refrigerant in form of gas is cooled and converted back into the liquid and pumped back into the system.

  • Refrigerant

The refrigerant is the liquid that moves along the coils in the air conditioner. Hot air is picked up by the air conditioner through the filters and from here, it is absorbed by the refrigerant in the coils. The refrigerant goes directly to the compressor located outside the house, where it is cooled off before being pumped back into the system. In most cases, the refrigerant is usually hydrofluorocarbons, and hydrocarbons. During the entire cooling process, the refrigerant is converted from liquid to gaseous and back to liquid state.

  • Evaporator

This is the component tasked with turning the liquid carrying heat with it, into a gaseous state. The heat carried by the liquid is taken to the compressor outside the house. At the same time, the evaporator picks up moisture from the hot air from the air blown into the air conditioner, thereby dehumidifying the house.

  • Condenser

Upon reaching the condenser, the heat carried in the refrigerant is lost to the environment through metal fins located here, thus cooling the refrigerant. The cool refrigerant then leaves the condenser through a gate like a point, called an expansion valve.

  • Expansion Valve

The expansion valve can be defined as a small opening contained in the metallic tubing in the air conditioner. It is tasked with controlling the amount of refrigerant that passes through it during the entire cooling process. It is where the refrigerant carrying heat from the room passes to the compressor for transformation into a gaseous state. This valve also regulates the already cooled off-gas from the compressor and then passes to the condenser for transformation back into a liquid state.

  • The Filters

The filters are fibrous like plates located in the air conditioner. They are tasked with trapping dust and debris picked up in the air circulating in your room. When you go for so long without cleaning the filters, they tend to be clogged with debris and this affects the normal functioning of the air conditioner. As a result, the air conditioner is forced to blow so hard, which may eventually destroy it. At the same time, the air conditioner consumes a lot of power, thus inflating your monthly energy bills. This is why you should clean your filters more often, to prevent clogging and extend the shelf life of the air conditioner.

So now, to answer our question, air conditioners do not bring in fresh air from outside. If they were to do that, they would wreak havoc in the house when they bring all manner of debris and dust with the air. This can be very chaotic especially during heavy pollen and strong winds season. As we have seen from the discussion above, an air conditioner picks up the hot air from the room, cleans and cools it off before circulating it back into the room. When you go to buy your air conditioner, ensure to pick the one that suits your room and style. Also, pick one with HEPPA enabled filters, and you will never have to deal with dust and pathogens.

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