SECTION 16: S PECIFICATIONS51 of 5516.2 General Technical Data Table* Do not exceed the maximum length of flue stated or heater may not operate properly.16.3 Technical Data TableModelUHD[T][M][X][S][R]150UHD[T][M][X][S][R]175UHD[T][M][X][S][R]200UHD[T][M][X][S][R]225UHD[T][M][X][S][R]250Full Load Amps @ 120 V A 2 2 2 2 2Minimum Air Volume CFM 1360 1400 2050 2100 2350Temperature Rise @Minimum Air Volume °F(°C) 83(46) 95(52) 73(40) 80(44) 80(44)Heat Exchanger PressureDrop @ Minimum Air Volume in wc 0.02 0.03 0.025 0.035 0.05Maximum Air Volume CFM 5800 6850 7750 8300 8850Temperature Rise @Maximum Air Volume °F(°C) 20(11) 20(11) 20(11) 20(11) 22(12)Heat Exchanger PressureDrop @ Maximum AirVolume in wc 0.16 0.29 0.163 0.253 0.35Flue Size* in(cm) 4 - All Models(10)Air Intake* in(cm) 4 - All Models(10)Duct Size (Width) 28(71) 28(71) 28(71) 28(71) 28(71) 28(71)Duct Size (Height) 24(61) 24(61) 32.5(83) 32.5(83) 32.5(83) 32.5(83)Weight (Net) lb(kg) 191(86.6) 211(95.7) 239(108.4) 249(112.9) 254(115.2)Model UHD[T][M][X][S][R]150UHD[T][M][X][S][R]175UHD[T][M][X][S][R]200UHD[T][M][X][S][R]225UHD[T][M][X][S][R]250Total Input High Fire (Btu/h) x (1000) 150 175 200 225 250Total Input Low Fire (Btu/h) x (1000) 105 122.5 140 157.5 175Total Output High Fire (Btu/h) x (1000) 123 143.5 164 184.5 205Total Output Low Fire (Btu/h) x (1000) 86 100 115 129 143.5Efficiency (Max Input) % 82 82 82 82 82Natural Gas Data - Inlet Pressure 5.0 in wc Min., 14 in wc Max.Burner Pressure High Fire in wc 3.0 3.0 3.2 3.4 3.45Burner Pressure Low Fire in wc 1.3 1.3 1.6 1.7 1.7LPG / Propane Data - Inlet Pressure 12.0 in wc Min., 14 in wc Max.Burner Pressure High Fire in wc 11.1 11.2 9.5 11.1 11.6Burner Pressure Low Fire in wc 5.0 5.5 4.7 5.4 5.5
