Noritz Eztr40 40 Gal. 0.5-6.6 Gpm Replacement Tank Natural Gas Tankless Water Heater

40 Gal. 0.5-6.6 GPM Tank Replacement Natural Gas Tankless Water Heater Professional Installation Recommended Hot And Cold Water Connections Located On Top Of The Unit So Existing Flexible Water Lines Can Be Easily Reconnected To New Unit Optimizes The Perfect Air/Fuel Ratio Based On Demand For Better Efficiency Greater Resistance To Corrosion And Scale Buildup Than Other Materials Compatible With Noritz Connect App With The Nwc Wi-Fi Adapter (Sold Separately) To View Usage And Control Via Wi-Fi, Requires Purchase Of Wi-Fi Hub (Internet # 304740446) Ideal For Smaller Home Applications Flex Venting To Run Through Existing B-Vent Saves Installation Time All Venting Accessories In One Box Isolation Valve Kit Included Full Solution For Direct Tank Replacement Unit Can Only Be Vented Vertically, It Cannot Be Vented Horizontally Maximum Flow Rate Up To 6.6 Gpm At A 30 Deg. Temperature Rise MFG# NRC663-FSV-NG