This Raypak filter box is a crucial component for maintaining the cleanliness and efficiency of heating systems. The model, known as D14 Filter/Box 4", is designed to trap and contain dust, debris, and other particulates that could potentially harm the system's performance. It features a sturdy construction with dimensions of 4 inches, ensuring it can withstand rigorous use while providing optimal filtration. The filter box is compatible with various Raypak heating systems, making it versatile for different setups. Its installation process is straightforward, allowing for easy replacement when necessary.