MRCOOL MCMP1824AOTB 1.5–2 Ton Multi-Positional Pre-Charged Evaporator Coil is an indoor evaporator coil designed to deliver efficient heat transfer in compatible split-system HVAC applications. It works by allowing refrigerant to absorb heat from indoor air as it passes through the coil, providing effective cooling and supporting heat pump operation. https://www.partshnc.com/mrcool-1-5-2-ton-pre-charged-a-coil-mcmp1824aotb