Simple Air, 19 OZ, Aerosol, EZ Green HVAC Coil Cleaner, Professional Strength Cleaner Designed To Remove Soil Build Up On Coils Of HVAC Unit, Vigorous Foaming Action Loosens Soil & Pushes Is Out Of Coils Without Damage To Unit, Non-Toxic, Biodegradable, & Odor Free, Use On Indoor Or Outdoor Units, Safe On: AC Condenser/Evaporator Coils, Fan Blades/Blowers, Electronic Filters, Electronic Air Cleaners, & Vent Grills/Registers.