The Metal Fab Double Wall Vent Collar, 4 inches in diameter, is an essential component for HVAC systems. Designed for superior durability and safety, this double-wall vent collar ensures efficient venting with minimal heat loss. Ideal for high-efficiency heating appliances, it provides secure connections, preventing leaks and maintaining optimal airflow. This 4-inch metal vent collar is perfect for residential and commercial applications, offering easy installation and robust performance. With corrosion-resistant materials and precision engineering, it guarantees long-lasting reliability. Enhance your HVAC system’s efficiency and safety with this premium 4-inch Metal Fab double wall vent collar.