An air handler cabinet is a metal enclosure that houses the components of a heating, ventilation, and air conditioning (HVAC) system. It is typically installed in the attic, basement, or a mechanical room and contains the blower, evaporator coil, condenser coil, and other components. The air handler cabinet is responsible for circulating air throughout the home, and it is an integral part of the HVAC system. The air handler cabinet works by drawing in air from the outside, heating or cooling it, and then distributing it throughout the home. It is also responsible for filtering the air, removing dust, pollen, and other airborne particles. The air handler cabinet is designed to be durable and reliable, and it should be inspected and maintained regularly to ensure it is functioning properly.