CoilShield is not a new invention. It is a new application of technology that has protected critical infrastructure for two centuries. From Sir Humphry Davy's 1824 solution for the Royal Navy to a global market that now exceeds five billion dollars annually, cathodic protection has an established record across ships, pipelines, water infrastructure, and buried storage tanks worldwide. Now it protects your HVAC coils.
Sir Humphry Davy demonstrates cathodic protection for the Royal Navy. By attaching blocks of iron to copper ship hulls, the iron corrodes instead of the valuable hull. Cathodic protection is born.
Michael Faraday establishes the electrochemical principles still used in cathodic protection systems worldwide.
First cathodic protection systems installed on U.S. gas pipelines.
Cathodic protection becomes legally mandated for underground fuel storage tanks and major oil and gas pipelines in the United States under EPA regulations. The technology is trusted to protect the country's fuel supply and drinking water.
CoilShield adapts proven cathodic protection for HVAC coil corrosion prevention, the first application to residential and commercial HVAC systems.
Proven Protection for Every Application
Everyone with an air conditioner faces some level of coil corrosion risk. The mechanisms are the same regardless of location: copper and aluminum in contact with condensate water creates a galvanic cell that slowly destroys the aluminum. The only variable is how fast.
Corrosion is fastest in coastal properties within 15 miles of salt water, pool and spa facilities where chlorine vapors are present, agricultural operations with ammonia and fertilizer exposure, humid climates where systems run continuously and produce more condensate, new construction with high VOC off-gassing especially spray foam insulated homes where those VOCs are trapped, and industrial or chemical environments.
Not About Avoiding Warranty Claims
Most residential coil failures are covered under warranty. CoilShield is about never needing that warranty claim in the first place.
Replacement happens on the manufacturer's timeline. A covered claim in July means diagnosis Thursday, parts shipping Monday, installation scheduled a week later. You write a check for $850 to $2,400 in labor and refrigerant while you wait. Prevention happens on your timeline, before the failure, at a fraction of that cost.
Want to see the manufacturer documentation yourself? We link directly to the original source PDFs.