AMP will redefine how you look at condensing boilers and boiler room layouts. AHRI certified at 97%, the AMP is highly efficient and remarkably compact, requiring only half the square footage of everyone else. Large diamter tubes deliver desired waterside characteristics for variable and full flow designs. It is also uniquely serviceable, providing complete access to the burner and combustion chamber. Available in 1000, 1250, 1500, 2000, 2500, 3000, 3500 and 4000 mbh inputs, the Amp has the POWER TO FIT!