A good evaporator coil is a necessary ingredient for great home energy efficiency and air comfort. It is the evaporator coil's job to pull the heat out of interior air, so cool air can be distributed throughout an environment. The more effective the air handler is at this job, the less energy is required to operate the system, so a quality coil can translate into real value. Do your homework to make sure you find the best evaporator coil to fit your system.