This training is perfect for service techs, installers, and company owners who want to maximize the performance and reliability of Navien. Navien Level 2 Training – Advanced Service & Troubleshooting with Johnstone Supply. Presented by Karl Sisson – Navien Expert Trainer. Take your Navien knowledge to the next level with this in-depth Level 2 training session led by Navien technical expert Karl Sisson. Designed for experienced technicians who have already completed a basic Navien course or have field experience, this class dives deep into advanced diagnostics, internal components, and service strategies. Explore best practices for installation refinement, system performance tuning, and troubleshooting common and complex issues across Navien tankless water heaters, combi-boilers, and boilers.

Jump in for hands-on tips to master combustion analysis and boost your boiler’s efficiency and safety! This focused training class is perfect for HVAC professionals who want to improve their combustion analysis skills and deliver safer, more efficient boiler service. Whether you're working on residential or light commercial systems, understanding combustion data is key to getting the most out of every install or service call. We’ll cover the fundamentals of combustion, why analysis matters, and how to use combustion testing instruments correctly. You’ll learn how to interpret readings, make necessary adjustments, and ensure boilers are operating at peak performance—all while maintaining safety and compliance.