Evaporative coolers are an environmentally-friendly way to keep your home cool in hot, dry climates because they don’t rely on chemical refrigerants to cool the air. Instead, evaporative coolers use water. Water-based cooling is better for the environment, and better for you, but we still have many homeowners ask us this question: “How do I prevent rust?”
What happens when water meets steel? Over time, it can form rust. Rust is a chemical reaction that occurs when iron and oxygen oxidize in the presence of water. It is corrosive and will disintegrate metal. Evaporative coolers require a supply of water, so while rust formation is a concern, here are a couple of simple ways to keep the rust at bay so your evaporative cooler stays rust-free.
There are many products commercially available to aid in rust prevention and removal. Some are general purpose rust-preventative spray paints, and others are more specialized paints made for evaporative coolers. These are available at most hardware stores. It’s always a good idea to keep some of these on hand for touch-ups and cooler winterization. We recommend coating the bottom pan of a new cooler. Most types of marine sealant, or similar products, work for this purpose. It is important to note that is unnecessary to coat the bottom of coolers with a plastic water reservoir.
Make a habit to check for rust at the end of each cooler season. Use a wire brush to scrub off any spots that you may find, then repaint the area before the beginning of the next season. The entire pan does not need to be repainted every year, but it is important to touch up spots that may have developed rust.
A bit of preventative maintenance will go a long way to keep your family cool and happy during the hot summer months. Our Customer Service Team is happy to answer any questions you may have about rust prevention. Give them a call at 800-643-8341, Monday through Friday, 7:00 am – 5:30 pm CST.