Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
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Comparison
Verdict in brief
The EZ98DV and EZ111DV are the two larger EZ Series models: both 0.98 UEF, 60 lb and the same cabinet, with the EZ111DV firing to 199,900 BTU/h and 11.1 GPM against the EZ98DV's 180,000 BTU/h and 9.8 GPM. Both start at a 12,800 BTU/h minimum.
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | Noritz EZ98DV | Noritz EZ111DV |
|---|---|---|
| Input, minimum | 12.8 MBH | 12.8 MBH |
| Input, maximum | 180 MBH | 199.9 MBH |
| Uniform Energy Factor (UEF) | 0.98 UEF | 0.98 UEF |
| Flow rate | 0.4 – 9.8 GPM | 0.4 – 11.1 GPM |
| Weight | 60 lb | 60 lb |
| Install location | Indoor & outdoor | Indoor & outdoor |
The EZ98DV and EZ111DV top the EZ Series, Noritz's condensing tankless DHW line. Both are DHW-only appliances with a 12,800 BTU/h minimum fire, 0.98 UEF, indoor-or-outdoor installation and the shared 26.1 x 18.1 x 11.8 in, 60 lb cabinet.
The EZ111DV adds 19,900 BTU/h of input ceiling (199,900 against 180,000) and 1.3 GPM of maximum flow (11.1 against 9.8) — the largest EZ size and the one that covers the heaviest residential demand, including larger tank replacements where simultaneous draws are common.
Both share the same 0.4 GPM minimum flow, 100–140°F settings and 120 VAC power. Neither is a combi: where space heating is also needed, Noritz's combi is the NRCB, and the EZ covers domestic hot water only.
Noritz
The Noritz EZ98DV is a condensing tankless water heater in the EZ Series — a DHW-only appliance, not a boiler — firing 12,800 to 180,000 BTU/h with 9.8 GPM maximum flow at 0.98 UEF.
Noritz
The Noritz EZ111DV is a condensing tankless water heater in the EZ Series — a DHW-only appliance, not a boiler — firing 12,800 to 199,900 BTU/h with 11.1 GPM maximum flow at 0.98 UEF.
11.1 GPM against the EZ98DV's 9.8 GPM, with maximum input rising from 180,000 to 199,900 BTU/h. Both are 0.98 UEF.
Yes. Both weigh 60 lb and measure 26.1 x 18.1 x 11.8 in with identical connections, installation options and temperature settings.
It is positioned for tank-replacement work, but whether it fits a specific home depends on the peak-demand and incoming-water-temperature calculation. A licensed contractor should verify the sizing against the installation manual.
A consultation includes a heat-loss review so the size is right the first time.
On-site service in Greater Vancouver, BC. ROMA lists “Open 7 days” on its site; call to confirm same-day availability.
Sources and verification
Facts checked September 9, 2026. Last updated September 9, 2026. Technical reviewer: not yet assigned.