Patent ID: 7338564

Claim:
A method of cleaning a coil or filter substrate selected from the group consisting of an evaporator coil, an air conditioning coil, or an electric air filter, said method comprising (a) mixing a pre-measured amount of a powdered coil or filter cleaner composition into about 0.5 to about 2 gallons of water to create a solution; and (b) applying said solution to said substrate; wherein the powdered composition comprises: from about 50 to about 90 wt. % of a peroxide source; from about 1 to about 20 wt. % of a surfactant; from about 0 to about 5 wt. % of a thickener; up to about 15 wt. % of a chelating agent; up to about 10 wt. % of a dust control agent; and up to about 30 wt. % of a dissolution enhancing agent.