Heavy duty evaporator coil cleaner. Cleans even the dirtiest evaporator coils. Eliminates slime from condensate trays. Safe for use with condensate pumps. Dirt building up on your evaporator will form a barrier to heat transfer effectively insulating the coil. Heavy dirt build-up can also clog the coil and reduce air flow leading to a lowering of the cooling effect and a need to run for longer to meet the users requirements. This will dramatically reduce your systems efficiency. Avoid all these problems by using HydroCoil.