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A Noritz tankless water heater comes from a Japanese tankless pioneer with a strong U.S. presence. Here’s an overview of the lineup and what makes each series different.
Noritz is a Japanese manufacturer specializing in gas tankless water heaters, with U.S. operations based in California. It sells condensing and non-condensing units for residential and commercial use, as well as combination units.
| Series | Type | Notes |
|---|---|---|
| EZ series (e.g., EZTR40) | Tank replacement models | Designed to simplify tank-to-tankless conversions |
| NRCP and other condensing models | Condensing | High efficiency, PVC venting |
| NRC series (e.g., NRC711) | Indoor direct-vent models | Check the spec sheet for condensing or non-condensing |
| Outdoor models | Outdoor | No vent pipe needed |
| NCC combination units | Combi | Hot water and space heating |
Noritz updates its range regularly; always confirm specs, venting type and efficiency on the current spec sheet.
Noritz requires installation by a qualified professional. Gas line sizing, venting, condensate drainage and isolation valves are the main items. See installation requirements.
Common Noritz codes include 11 (ignition failure) and 12 (flame failure). Many Noritz units have a code chart inside the front cover. Basic checks and repair tips are in our error codes guide and repair guide.
Noritz whole-house units are typically priced in line with other major Japanese and Korean brands. Compare current prices and warranty terms on product pages.
See current listings with BTU, GPM, venting and condition.
Noritz is a long-established Japanese manufacturer focused on tankless water heating, with U.S. operations in California and a network of trained installers. Reliability depends on sizing, installation and maintenance.
The EZ series is designed for replacing a tank water heater with tankless more easily, with features intended to reduce installation changes. The EZTR40 is aimed at replacing a 40-gallon tank. Check the manual for venting and gas requirements.
When more than one remote controller is installed, the priority indicator shows which controller currently controls the temperature setting. Press the priority button on the controller you want to use.
Noritz publishes owner’s and installation manuals on its website. Search by your model number, which is on the rating plate.
This guide is general information for U.S. homeowners, not professional advice. Gas, electrical and venting work must follow the manufacturer’s instructions and local codes, and in most areas requires a licensed plumber, electrician or gas fitter and a permit. Specifications and prices change; always confirm details on the product page and in the installation manual.
