10 Best AC Unit Coil Cleaners 2026 in the United States

The Simple Green Foaming Coil Cleaner is a professional-grade liquid cleaner designed to remove dirt, grease, and grime from AC coils and other similar equipment. Its non-caustic, non-flammable formula is a big plus, making it safer to use around sensitive machinery and food processing areas, thanks to its NSF registration. Because it is self-rinsing on condensate-producing coils, it reduces the need for extra rinsing steps, which simplifies the cleaning process. The cleaner is unscented, which is good if you prefer no strong smells during use.

It works well on a variety of surfaces including HVAC units, refrigerators, freezers, and heat exchangers, showing good compatibility with common coil materials. However, the product comes in a large 5-gallon container, which might be heavy and bulky for casual or small-scale users. While it effectively targets buildup that can slow down equipment, its liquid form and size might require some care in handling.

This cleaner is suitable for professionals or users who regularly maintain multiple or large units and want a reliable, safe, and versatile cleaner without harsh chemicals.

The Simple Green Foaming Coil Cleaner is a chemical cleaning agent designed specifically for AC coils. Its foaming formula helps cling to coils for better cleaning, making it effective at removing dirt and buildup. One of its strengths is that it is unscented, which can be more pleasant for indoor use and less likely to cause irritation. The product comes as a liquid in a gallon-sized container, weighing about 5 pounds, which should last for multiple cleaning sessions but might be a bit heavy to handle for some users. It is made in the USA and is a well-known brand in cleaning products.

The product is designed to be compatible with most AC coils, but users should always check their unit’s manual or manufacturer's recommendations before use. In terms of ease of use, the foaming action simplifies applying the cleaner and helps it stay in place during cleaning, though some spray equipment may be needed to apply it evenly. This coil cleaner is a solid choice for homeowners looking for a reliable, unscented product that targets coil dirt effectively, but those preferring smaller packages or faster drying formulas might want to consider other options.

The Zep Foaming Coil Cleaner is designed to make it easier to maintain the evaporator coils on HVAC and AC units, using a convenient aerosol formula. One of its biggest strengths is its professional-strength cleaning capability, which allows it to quickly penetrate and remove soil from coil surfaces, making maintenance simpler and more effective.

The product is especially useful in various settings like apartments, office buildings, hospitals, and schools, making it versatile for both residential and commercial use. The 360-degree valve is a notable feature, allowing you to spray the cleaner in any direction, which reduces the effort required to reach tricky spots on the coils. This ease of use is a significant advantage for both professional HVAC contractors and DIY users.

Users need to remember that it's a chemical cleaner, so proper handling and safety precautions are necessary. While it effectively flushes away dirt with condensation, the product comes in a case of 12, which is great for bulk use but might be excessive for individual homeowners. Additionally, the aerosol form may not be as environmentally friendly as some non-aerosol alternatives. The Zep Foaming Coil Cleaner is a powerful and versatile option for maintaining HVAC and AC units, offering easy application and effective cleaning, though users should consider the chemical nature when using it.