Air conditioners typically do not bring in fresh air from outside directly. Their primary function is to cool or heat the air inside a building or room by recirculating and conditioning the existing indoor air.
However, some air conditioning systems can incorporate ventilation components or features to introduce fresh outdoor air into the indoor environment. These systems are known as "ventilation air conditioning" or "mixed-mode air conditioning" systems. Here are a few common methods used to bring in fresh air in such systems:
Mechanical Ventilation: Dedicated mechanical ventilation systems, separate from the air conditioning system, can be installed to supply fresh outdoor air. These systems usually include fans that draw in outside air and distribute it throughout the building, often through ductwork.
Air Handling Units (AHUs): In larger commercial buildings, air handling units are used to condition and distribute air. AHUs can be designed with outdoor air intakes that bring in fresh air. The incoming air is then mixed with the recirculated indoor air and treated by the air conditioning system.
Natural Ventilation: Some buildings are designed to utilize natural ventilation strategies. This involves incorporating windows, vents, or openings that allow fresh air to enter the space. Air conditioners in such buildings can be designed to work in conjunction with natural ventilation systems to enhance indoor air quality.
It's important to note that the introduction of fresh outdoor air through an air conditioning system requires additional equipment and design considerations. Not all air conditioning systems have this capability by default. If you're interested in incorporating fresh air ventilation into your air conditioning system, it's advisable to consult with an HVAC professional who can assess your specific requirements and recommend appropriate solutions.