The answer to 'what is AC' is air conditioning, a system that cools and dehumidifies the air in a home or building. AC systems use refrigeration to remove heat from the indoor air and release it outside, providing a comfortable, cooler indoor environment. AC units consist of a compressor, condenser, and evaporator coil that work together to circulate refrigerant and transfer heat.
AC systems are essential in many climates to maintain a comfortable temperature and humidity level indoors, especially during hot summer months. They can also help improve indoor air quality by filtering out dust, pollen, and other airborne particles.