The Hi-Altitude Burner Kit for Natural Gas MI40S by Bradford White is specifically designed for high-altitude applications, ensuring optimal performance in challenging environments. This kit is compatible with FVIR (Flammable Vapor Ignition Resistant) systems, providing enhanced safety features. Constructed from high-quality materials, it offers durability and reliability for long-term use. The kit includes all necessary components for installation, making it easy to upgrade or replace existing burners. Ideal for both residential and commercial water heating systems, this burner kit ensures efficient operation and compliance with industry standards.