The answer to 'what is AC' is air conditioning, a system that cools and dehumidifies the air inside a home or building. AC systems use refrigerant, fans, and coils to remove heat and moisture from the air, providing a comfortable indoor environment. They are an essential part of modern homes and buildings, especially in hot or humid climates.
AC systems work by circulating refrigerant through coils to absorb heat from the indoor air. The refrigerant then passes through a compressor, which increases the pressure and temperature of the gas. The hot refrigerant then flows through an outdoor coil, where the heat is released to the outside air. This cycle repeats, continuously cooling and dehumidifying the indoor air.