Noritz EZ111DV Tankless Water Heater vs Navien NPE-240A2 Tankless Water Heater

Both are 199,900 BTU condensing indoor tankless units with dual stainless steel heat exchangers, so raw heating power is a tie. The Navien NPE-240A2 is the stronger pick for most homes: it adds a built-in recirculation pump and buffer tank for faster hot water at the tap, a field gas conversion kit, and a slightly higher 11.2 GPM flow rating. The Noritz EZ111DV edges it on efficiency at 0.98 UEF versus 0.95 and has a cleaner top-mounted connection layout, but it lacks the built-in recirculation that owners of the Navien consistently praise. Choose the Noritz if top efficiency and simple venting matter most; choose the Navien if you want near-instant hot water without adding a separate recirculation system.

• Choose the Noritz EZ111DV if you want the highest efficiency in this pair and a straightforward install without a recirculation loop.
• Choose the Navien NPE-240A2 if you want faster hot water at the fixtures and a buffer tank built in, without buying extra recirculation hardware.