The Ramsond PTAC sleeve is a crucial component of the Packaged Terminal Air Conditioner (PTAC) systems, designed for through-the-wall installation. Constructed with high-grade HDG galvanized steel, it ensures durability and resistance to corrosion. The sleeve's insulation is enhanced with a baked urethane primer and a topcoat enamel, providing additional protection against the elements. Standard sizing for these sleeves is typically 14-1/8 in. x 42 in., accommodating most PTAC units. This robust construction not only supports the PTAC unit but also contributes to the overall thermal efficiency of the system, making it a reliable choice for hotels, motels and residential applications.