The SONIC stainless steel boiler line from Patterson-Kelley ranges from 650 to 1,000 mBtus and boasts the compact capabilities of existing P-K SONIC boilers while satisfying either comfort heat or domestic hot-water applications. Compact and operating up to AHRI-certified 97 percent efficiency with up to 7-1 turndown ratio and ultralow emissions, the line easily fits through a standard 36-inch doorway and allows for easy access to the front maintenance door, saving time and money associated with repair and maintenance. Each unit comes with the NURO touch-screen control system with NURO Connect, allowing for live monitoring and control of the indoor boiler system anytime, from anywhere. 877/728-5351; www.harscopk.com.