Designed for Maximized Comfort Without Sacrificing Savings The P-K STORM™ is built to transform the commercial boiler market. This top of the line, highly efficient condensing boiler is designed to maximize comfort during those long cold winter days without sacrificing savings. The P-K STORM™ water-tube boiler operates at up to 97% thermal efficiency with 10:1 mechanical turndown capabilities. Advanced Design The advanced design of the P-K STORM™ heat exchanger has the end user in mind when it comes to performance and longevity of a boiler. Between headache-free annual maintenance, available outdoor units, and higher turndown capability to match input building loads, the P-K STORM™ is ready for any forecast that may be in its future. 10:1 Mechanical Turndown Standard 10:1 mechanical turndown is standard on all P-K STORM™ units. Patterson-Kelley has achieved higher turndown with a unique process that allows the gas valves to reliably turn down without adding excess air. This allows designers the ability to match input to building loads without sacrificing reliability. FEATURES 1250-2000 MBTU Up to 97% thermal efficiency 316L Stainless steel coil ensures maximum corrosive resistance and durability Full modulation burner with up to 10:1 mechanical turndown Cabinet and heat exchanger design reduce repair and maintenance costs Outdoor Capabilities Variable speed combustion air blower Certified at 3.5 inch Water Column minimum gas pressure Pressure drops as low as 4.7' at 40° ΔT The compartmentalized design produces efficiency of heat transfer in each section