The P-K SONIC® stainless steel, condensing boiler surpasses all expectations in efficiency, size, and material design.
Patterson-Kelley’s stainless steel boiler breaks through the limitations of all other stainless designs with sizes utilizing our revolutionary DUET™ technology. This is the industry’s first heat exchanger comprised of two unique chambers built to optimize the turndown process. Our unique heat exchanger designs allow the P-K SONIC® to operate to 97% AHRI efficiency with up to 7:1 turndown and ultra-low NOx emissions.