Utica SSC Natural or Propane Gas-Fired Modulating Condensing Hot Water Boiler Dimensions/Weights Front Boiler Input Rate (MBH) (1) Max. Min. Heating Capacity (MBH) (1)(2) UBSSC-050 50 10 46 40 95.0 UBSSC-100 100 20 91 79 95.0 UBSSC-200 200 Model UBSSC-075 UBSSC-150 B 15 75 150 UBSSC-299 AFUE % (2) 69 95.0 60 30 139 121 60 273 239 40 299 Net AHRI Rating, Water (MBH) (1)(3) 185 95.0 95.0 161 95.