Installing the correct indoor or evaporator coil is essential for getting the highest performance and comfort from your central air conditioning or heat pump system. The evaporator coil is where the actual cooling takes place as the heat in the air is absorbed by the refrigerant in the coils. As air is passed through the system, the coil will absorb the heat and you in return get that cold breeze throughout the house. For best performance, it is recommended that you install a brand-name coil with a brand-name air conditioner or heat pump system. And as always, brand-name equipment offers some of the best warranty protection coverage in the heating and cooling industry.