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With more power than any tankless water heater in its class the NR98 series is ideal for mid-size homes with up to 4 showers. Built-in features include safety lock-out freeze protection and high elevation adjustment. PVC CANNOT be used for venting.Air Supply Exhaust Type: Power Vented Capacity Range: 0.5-9.8 Gal. min. Casing Materials: Zincified Steel Plate Polyester Coating Color: White Consumption: 75W Freeze Prevention 145W Default Temperature Options (Deg): 120130140180 F (Original is 120 F) Depth: 9-2 5 Energy Star Compliant: Yes Flue Collar Materials: Stainless Steel Fuel Type: Liquid Propane Natural Gas Gas Inlet: 3 4" Heat Exchanger Materials: Copper Sheeting Copper Tubing Height: 23-3 5 Hot Water Outlet: 3 4" Ignition: Direct Ignition Installation Type: Indoor Outdoor Wall Hanging Max Gas Consumption: 199900 BTU Hr Maximum Hot Water Capacity: 45 degree F Rise 7.5 Gal. min. Min Gas Consumption: 12000 BTU Hr Minimum Flow Rate: 0.5 GPM Operating Pressure: 15-150 psi Supply: 120 VAC (60Hz) Temperature Settings (Deg): 100-150 F (In 5 F intervals) 160 170 180 F (In 10 F intervals) (14 Options) Thermal Efficiency: 84% Water Holding Capacity: 0.2 Gallon Water Inlet: 3 4" Weight: 47 Width: 13-4 5{Features Safety Devices: Flame Rod Thermal Fuse Lightning Protection Device (ZNR) Electric Leakage Prevention Device (GFCI) Overheat Prevention Device Freezing Prevention Device Fan Rotation Detector Safety lock out - Default max. 120 degrees (refer to owner's manual for higher temp) Dual flame burner - Noritz exclusive Minimizes temperature fluctuations Fully modulating - Automatically adjusts burner level accordingly Turbo Flow - Up to 9.8 GPM 35 degree temperature rise (7.5 GPM 45 degree rise) Quick[]