The MRCOOL MCHP51CNPA Signature Series 4 Ton Horizontal Evaporator Coil is a high-performance HVAC component designed to enhance the efficiency of compatible central air conditioning and heat pump systems. Installed inside the indoor air handler or furnace, it works by absorbing heat from indoor air as refrigerant flows through the coil, delivering effective cooling and improved comfo... https://www.partshnc.com/mrcool-signature-horizontal-coil-mchp51cnpa