The MRCOOL MPC421M414A Signature Series 3.5 Ton Packaged Unit Air Conditioner is a self-contained cooling system designed to deliver reliable and efficient climate control for residential and light commercial applications. It works by circulating refrigerant to absorb indoor heat and release it outdoors, providing consistent cooling performance. This packaged unit is used with compati... https://www.partshnc.com/mrcool-signature-packaged-air-conditioner-mpc421m414a