Noritz EZ111DV
The Noritz EZ111DV (EZ Series PRO) is a high-capacity condensing gas tankless engineered for easy replacement of a large tank: 199,900 BTU/h, up to 11.1 GPM, and an exceptional 0.98 UEF, with top-mounted water connections that let an installer reuse existing plumbing. It pairs dual stainless-steel heat exchangers with inverter-style burner modulation and a Steady BTU Mode for consistent temperature, is ENERGY STAR certified, installs indoor or outdoor, and direct-vents with 2- or 3-inch PVC/CPVC up to 65 feet. Its standout is the warranty: 25 years on the heat exchanger — among the longest in the industry.
This is genuine whole-home, cold-climate capacity — roughly 11 GPM in warm conditions and still about 5.6 GPM at a hard 70 °F winter rise, comfortably running several fixtures at once. As a condensing unit it needs a condensate drain and appropriate venting, and at 199,900 BTU it wants proper gas sizing and a professional install. For a homeowner replacing a big tank who wants maximum efficiency, top-connection convenience, and the reassurance of a 25-year heat-exchanger warranty, the EZ111DV is a compelling flagship.
Key Features
Best Use Cases
Our Verdict
A flagship condensing tankless built for painless big-tank replacement — top connections, 11.1 GPM, a class-leading 0.98 UEF, and a remarkable 25-year heat-exchanger warranty. Cold-climate whole-home capacity with the longest exchanger coverage around. The trade-off is a premium price and a proper condensing install.
What owners report
Themes summarized from verified-purchase reviews across major retailers (4.2★ average, 35 ratings). These are aggregated owner opinions — not our own bench testing.
The top water connections are repeatedly praised for letting installers reuse existing lines, speeding the swap from a tank.
Owners credit the 0.98 UEF and Steady BTU Mode for low gas bills and consistent temperature under load.
The 25-year heat-exchanger warranty stands out to buyers as strong long-term peace of mind.
As a 199,900 BTU condensing unit it needs a condensate drain, PVC venting, and proper gas sizing.
Noritz EZ111DV FAQ
Why is it easier to install as a replacement?+
Its water connections are on top, so an installer can reuse the existing plumbing from a tank rather than re-routing lines — a real time-saver on retrofits.
How long is the warranty?+
25 years on the heat exchanger plus 5 years on parts — among the longest heat-exchanger warranties in the industry.
Will it handle a cold climate?+
Yes — it delivers about 5.6 GPM even at a hard 70 °F winter rise, keeping several fixtures running in cold weather.
What venting does it use?+
As a condensing unit it direct-vents with 2- or 3-inch PVC/CPVC up to 65 feet and requires a condensate drain.
Price range from leading retailers
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