Coating Your Commercial HVAC Coils

Commercial HVAC coils naturally degrade over time due to environmental factors and galvanic corrosion. This degradation leads to higher energy and maintenance costs, often necessitating earlier-than-expected coil replacements. One of the most efficient ways to extend the lifespan of your coil is by applying a protective coating.

Coating your HVAC coil enhances its resilience against corrosion caused by a wide range of contaminants and helps maintain optimal performance, even under harsh conditions. But with so many options available, selecting the right coating can feel overwhelming.

Which Coil Coating Should You Choose?

Having worked extensively with various types of coil coatings, we’ve witnessed firsthand how different coatings perform over the course of a coil's life. While multiple options exist, one coating stands out among the rest: Energy Guard USA.

Why Energy Guard?

We’ve consistently found Energy Guard to be one of the best in the industry when used on both custom and OEM replacement coils. Their cost-effective and sustainable solution offers impressive protection against corrosion. Here’s why they stand out:

• Their proprietary DCC formula (Dual Cure Chemistry) deeply penetrates every part of the coil, curing quickly—around 15 minutes—to minimize labor and handling costs.
• Manufactured with 30% aluminum flakes, the coating improves thermal conductivity and boosts heat transfer efficiency while resisting mold and mildew.
• At just 1 mil thick (about the width of a human hair), the coating won’t chip, obstruct airflow, or hinder performance.
• Coated coils pass rigorous 10,000-hour salt spray tests (ASTM B117), one of the toughest corrosion tests in the market.
• With high solids and low VOCs, Energy Guard’s polyurethane formulation is eco-friendly and safe for the environment.
• Expert-certified technicians handle all coating processes to guarantee top-notch application quality.

How Much Does It Cost to Coat a Coil?

Coating costs depend on several factors, including the coil design, such as its square footage, row count, and fins per inch. If you're getting a quote for a custom or OEM replacement coil, make sure to inquire about adding a protective coating—it tends to be more economical this way. While it’s possible to apply a coating post-installation, doing so may involve additional charges.

Will a Coated Coil Last Longer?

Absolutely! When proper maintenance practices are followed, a coated coil can last up to twice as long as an uncoated one. However, it’s essential to remember that a coated coil isn’t immune to dirt accumulation or blockages. Regular cleaning remains crucial, as it ensures the coating stays in excellent condition to provide long-term corrosion protection.

The Nationwide Coils Blog is a commercial HVAC resource created by industry veterans with nearly two decades of expertise. We share valuable insights into commercial HVAC products and services and welcome your feedback or questions at any time.