29Specifications-1 • Specifications may be changed without prior notice.• The capacity may differ slightly, depending on the waterpressure, water supply, piping conditions, and water temperature.SpecificationNR71-SVIndoor/ Outdoor, Wall MountedPower VentedDirect Ignition15-150 psi0.5 GPM23.6"(Height) x 13.8"(Width) x 6.7"(Depth)41 lbs.0.2 Gallon3/4"3/4"3/4"120 VAC (60Hz)NG : 59WLP : 66WFreeze Prevention 141WZincified Steel Plate/Polyester CoatingStainless SteelCopper Sheeting, Copper TubingFlame Rod, Thermal Fuse, Lightning ProtectionDevice (ZNR), Overheat Prevention Device,Freezing Prevention Device, Fan Rotation DetectorSpecificationsItemModel NameTypeIgnitionOperating PressureMinimum Flow RateDimensionsWeightWater Holding CapacityAccessoriesInstallationAir Supply/ExhaustConnection SizesPower SupplyMaterialsWater InletHot Water OutletGas InletSupplyConsumptionCasingFlue CollarHeat ExchangerSafety DevicesNR71-ODNG : 46WLP : 50WFreeze Prevention 141WItemGas ConsumptionMaximum Hot Water CapacityCapacity RangeTemperature Settings(Using the remote controller)Default Temperature OptionsNG : 180,000 btuh, LP : 180,000 btuh45°F Rise100-150°F (In 5°F intervals), 160°F (12 Options)Maximum PerformanceMinimum PerformancePerformanceNG : 25,000 btuh, LP : 25,000 btuh6.3 Gal./min.0.5-7.1 Gal./min.120, 130, 140°F (Original is 120°F)NR71-SV NR71-ODOutdoor, Wall MountedPower VentedAnchoring Screws,Power CordAnchoring Screws