Noritz Tankless Water Heater Problems Noritz Inc was established in 2006 and has since then made a name for itself as one of North America's leaders in terms of home comfort. They provide a wide variety of high quality tankless gas water heaters, widely renowned for being outstandingly durable and efficient heating solutions. The Noritz EZ Series heaters are the best solution for an easy tankless installation. Noritz 9.8 GPM EZ Series - Natural Gas Hi-Efficiency Indoor/Outdoor Tankless Water Heater. Get the best deal for Noritz Tankless Water Heaters from the largest online selection at eBay.com. Browse your Noritz NRC1111-DV-NG Indoor 11.1 GPM 199K BTU/h NEW IN ORIGINAL BOX W/ MANUALS. Condition is New. Shipped with Flat Rate Freight. NORITZ Tankless Water Heater Model NE71-SV Gas Noritz - NRC711 DV Residential Condensing Tankless Water Heater. The ENERGY STAR rated Noritz NRC711 DV Natural Gas Condensing Tankless Water Heater, is part of Noritz's ecoTOUGH Series of gas fired residential condensing tankless water heaters, is designed for smaller homes and multi‐family dwellings. Since Rinnai water heaters are one of the most advanced tankless water heaters available, we recommend to contact a service technician that's authorized to work on Rinnai water heaters. Each Rinnai unit uses a temperature controller (either MC-91-1 or MC-91-2) on the front panel to display various configuration options for installation as Tankless Water Heater Pump with a Noritz Tankless Water Heater. If the tankless water heater is located a long distance from the fixture (not a point of use system) you might want to consider using a tankless water heater pump with your new Noritz water heater. Only use replacement parts manufactured by Noritz for this model as listed in the Installation Manual Parts List for service on this unit. Use appropriate tools. • The water heater can be quickly con?gured for installations above 2000' by simply adjusting dip switches inside