USA Coil & Air is a U.S.-based manufacturer specializing in custom replacement HVAC coils and air handling equipment for commercial and industrial applications. Founded in 1982 and headquartered in Glen Mills, Pennsylvania, they offer chilled water coils, hot water booster coils, steam coils, condenser coils, and fan coil units. The company is known for its patented Sentry Guard™ technology that prevents freeze damage in water and steam coils. They provide quick coil selection, same-day quotes, and detailed product drawings to support contractors, distributors, and end-users with efficient and reliable HVAC solutions.