Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
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Comparison
Verdict in brief
The EZ71DV and EZ98DV are adjacent EZ Series condensing tankless water heaters, both 0.98 UEF, 60 lb and sharing the same 26.1 x 18.1 x 11.8 in cabinet with a 12,800 BTU/h minimum. The EZ98DV raises input from 160,000 to 180,000 BTU/h and flow from 9.0 to 9.8 GPM.
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | Noritz EZ71DV | Noritz EZ98DV |
|---|---|---|
| Input, minimum | 12.8 MBH | 12.8 MBH |
| Input, maximum | 160 MBH | 180 MBH |
| Uniform Energy Factor (UEF) | 0.98 UEF | 0.98 UEF |
| Flow rate | 0.4 – 9 GPM | 0.4 – 9.8 GPM |
| Weight | 60 lb | 60 lb |
| Install location | Indoor & outdoor | Indoor & outdoor |
Both models are condensing tankless water heaters in Noritz's EZ Series, a DHW-only line with no space-heating circuit. They share a 12,800 BTU/h minimum fire, 0.98 UEF, a 60 lb, 26.1 x 18.1 x 11.8 in cabinet, indoor-or-outdoor installation, 120 VAC power and 100–140°F temperature settings.
The step is capacity: the EZ98DV fires to 180,000 BTU/h against 160,000 and publishes 9.8 GPM maximum flow against 9.0, with the same 0.4 GPM minimum. That headroom supports heavier or more simultaneous hot-water demand, while the identical minimum fire means both modulate down to the same floor in light use.
Both are positioned for replacing larger storage-tank units, and both carry the line's Steady BTU Mode and the same 0.98 UEF rating. Sizing follows the peak hot-water demand calculation, not the house's floor area.
Noritz
The Noritz EZ71DV is a condensing tankless water heater in the EZ Series — a DHW-only appliance, not a boiler — firing 12,800 to 160,000 BTU/h with 9 GPM maximum flow at 0.98 UEF.
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.
No. Both print 0.98 UEF; the difference is capacity — 160,000 against 180,000 BTU/h and 9.0 against 9.8 GPM.
No. The EZ Series is a condensing tankless water heater line for domestic hot water only. Noritz's combi boiler is the NRCB.
Sizing depends on fixture flow rates, simultaneous use and incoming water temperature, not bathroom count. The EZ98DV publishes 9.8 GPM and the EZ111DV 11.1 GPM; a licensed contractor should confirm the demand calculation.
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.