City Series CB50E Direct Vent Gas Fireplace | 1City Series CB50E Direct Vent Gas FireplaceMODEL CB50E-NG CB50E-LPFuel Type Natural Gas PropaneMinimum Supply Pressure 5” W.C. (1.25 kPa) 11” W.C. (2.73 kPa)Manifold Pressure - High 3.8” W.C. (0.94 kPa) 10.5” W.C. (2.62 kPa)Manifold Pressure - Low 1.1” W.C. (0.27 kPa) 2.9” W.C. (0.72 kPa)Orifice Size -Altitude 0-4500 ft # 36 DMS # 52 DMSMinimum InputAltitude 0-4500 ft. (0-1372m)19,000 Btu/h(5.56 kW)17,000 Btu/h(4.98 kW)Maximum InputAltitude 0-4500 ft. (0-1372m)35,000 Btu/h(10.25 kW)33,000 Btu/h(9.66 kW)Vent Sizing 5” Inner / 8” Outer 5” Inner / 8” OuterCSA P.4.1. 57.49% 60.55%NOTE: This model comes with a 5” inner and 8” outer collar (127 mm x 203 mm) which must be reduced to 4” inner x 6-5/8” outer(102 mm x 168 mm) in all applications when used as a power vent system. See power vent manual for details.Note: Height Dimension is taken with leveling legs fully inserted and may vary depending on the height of the leveling legs, whenunscrewed or extended.Dimensions will appear as (inches)" / (metric) mm throughout this manual. The inches are rounded to the nearest 1/16" when con-verted, when greater accuracy is required, use the metric dimensions.Note: These units are non-load bearing.ALL PICTURES / DIAGRAMS SHOWN THROUGHOUT THIS MANUAL ARE FOR ILLUSTRATION PURPOSES ONLY.ACTUAL PRODUCT MAY VARY DUE TO PRODUCT ENHANCEMENTS.Dimensions - Bay Install13 38 "340mm18"457mm10 316 "259mm60"1524mm61 116 "1551mm11 516 "288mm9 18 "231mm11 516 "288mm48 1116 "1236mm5"127mm8"203mm37"940mm20 716 "519mm20 1516 "532mm13 716 "341mm18"457mm10 18 "258mm60"1524mm61 116 "1551mm11 516 "288mm9 18 "231mm11 516 "288mm48 1116 "1236mm5"127mm8"203mm37"940mm20 716 "519mm20 1516 "532mm10 18 "257mm4 716 "112mm16 58 "423mm