Dependable Condensing Boiler BTU CAPACITY & TURNDOWN RATE: 20K-199K BTU - (10:1) TDR EFFICIENCY: 96.0% (AFUE) The Elite Fire Tube Ultra Boiler were thoughtfully designed by our Italian Engineers to combine efficiency, dependability, and quality in one product. Packed with state-of-the-art technologies, smart connectivity, an easy to use interface, and whisper quiet operation, the Elite Fire Tube Ultra is made to perform and last. Vertical down fired Stainless Steel Heat Exchanger for exceptional efficiency, low pressure drop, and durable performance. ABSOLUTE EFFICIENCY Up to 96% AFUE while using an outdoor sensor (included) 10:1 turndown ratio limits short cycling and provides more efficient energy consumption Built-in automatic bypass eliminates expensive primary / secondary piping Equipped with a built-in highly efficient ECM Pump WHISPER QUIET OPERATION Thanks to a pump and combustion fan with insulating panels EASY TO USE INTERFACE LCD display with digits, symbols, and an intuitive menu to easily set the desired temperature, activate functions, and manage different heating zones COMBI BOILER: FULL COMFORT SETTING Domestic hot water preheat function for instant hot water SMART CONNECTIVITY WITH HTP LINK The Elite Ultra boiler is always at your fingertips with a WiFi gateway on board, allowing the boiler and its many system parameters to be monitored remotely. Set up real-time service notifications and maintenance alerts to ensure that the unit is regularly monitored, overdue for maintenance, or if professional assistance is recommended.