What distinguishes an air conditioner from an air handler?

An air conditioner is specifically designed to cool the air within a space by removing heat and excess humidity, thus lowering the temperature. It contains a refrigeration cycle, which involves components such as a compressor, condenser, expansion valve, and evaporator coil. The process of cooling involves extracting heat from the internal environment and discharging it outside, leading to a comfortable indoor climate.

On the other hand, an air handler primarily functions to circulate and distribute air throughout a building. It does not inherently cool the air but may work in conjunction with other systems, like an air conditioner or a heat pump. The air handler typically contains a blower, filters, and various components for controlling airflow but lacks the refrigeration elements responsible for making air colder.

This distinction is crucial for understanding HVAC systems as it helps in identifying the roles these components play in maintaining indoor air quality and comfort. An air handler can function with temperate air generated by the air conditioning system, thus fulfilling its role of promoting air circulation without performing the actual cooling process.