The Carrier 5F20/30/40/60 Liner Assembly 5F30-1003 is a high-quality HVAC product manufactured in the United States by Carrier. This liner assembly is designed for use with Carrier 5F20, 30, 40, and 60 series furnaces. With a focus on efficiency and durability, this product is a reliable choice for commercial and industrial heating applications. Trust in the Carrier brand for top-notch HVAC solutions.