This Burnham Commercial Canopy Assembly is designed for high-altitude applications and consists of three sections. The assembly is specifically engineered to be compatible with PVG models, ensuring seamless integration and optimal performance. It serves as a crucial component in the efficient operation of heating systems, facilitating the proper venting of combustion gases to enhance safety and efficiency. The high-altitude design allows it to function effectively in areas with elevated altitudes where air pressure and oxygen levels can impact the operation of heating systems. The three-section structure provides flexibility during installation, allowing adjustments based on specific system requirements or spatial constraints.