Noritz NR71-ODNG Outdoor Natural Gas Residential Tankless Water Heater Safety lock out - Default max. 120 degrees (refer to owner's manual for higher temp) Standard burner - High performance single flame burner Fully modulating burner - Automatically adjusts burner level accordingly Turbo Flow - Up to 7.1 GPM at 35 degree temperature rise (6.3 GPM at 45 degree rise) Direct ignition - No standby pilot light