The Rheem Low NOx Orifice is designed for use in gas heating systems, specifically featuring a 3-hole inshot design for optimal combustion efficiency. This orifice reduces nitrogen oxide emissions, making it an environmentally friendly choice. Constructed from high-quality materials, it meets industry standards for safety and performance. Its precise dimensions ensure compatibility with various Rheem models, facilitating easy installation. Upgrade your heating system with this low NOx orifice to enhance efficiency and reduce environmental impact.