Used Unilux Flextube model ZP400-HS-200 Hot Water Boiler Rated at 400 MBH (117KW) output. Equipped with a Power Flame Model NP2R0G0520 Low NOX Burner Firing on Natural Gas (Meets CA Sub 9ppm NOX Emissions). 5 HP-TEFC 3450 rpm Blower 460/3ph/60. Honeywell controls. Siemens LMC 37 lame Safe Guard and combustion control with display and parallel positioning control. Built 2014.