Bryan Steam offers the Compliance+® Series hot water and steam boilers featuring Bryan's Ultra Low Nox Boiler/Burner design. These gas fired, flexible water tube boilers utilize the latest metal fiber burner technology combined with Air-Fuel ratio control and a PID Controller to provide a 5 to 1 turndown ratio and corrected Nox levels of sub 12 PPM through the entire turndown range. Available as either hot water or steam (15PSIG/150PSIG) in four inputs: 2,100 MBH, 2,400 MBH, 2,700 MBH and 3,000 MBH.