Noritz NRC1111-DV-NG Indoor Condensing Tankless Water Heater

The Noritz NRC1111-DV-NG Indoor Condensing Tankless Water Heater is Noritz's residential flagship — 11.1 GPM peak flow, 199,900 BTU condensing burner, 0.96 UEF, 12-year heat exchanger warranty. Noritz invented residential tankless in Japan (50+ years of tankless heritage predating most US competitors), and the NRC1111 reflects that engineering depth.

Headline specifications

• Type: indoor condensing tankless, direct vent, natural gas (LP-convertible)
• Maximum flow rate: 11.1 GPM at 35°F rise
• BTU input: 15,000–199,900 BTU/h (modulating)
• Energy Factor (UEF): 0.96
• Min activation flow: 0.5 GPM
• Temperature range: 100°F – 140°F (commercial models go higher)
• Warranty: 12-year heat exchanger, 5-year parts
• Venting: PVC/CPVC up to 75 ft (or polypropylene to 100 ft)
• Dimensions: 25" H × 17" W × 10" D

Who this model is for

4–5 person households with 2–3 bathrooms, peak demand of 2–3 simultaneous demand points, existing natural gas service with 3/4" gas line, install path for PVC or polypropylene venting. Buyers who specifically value Japanese-engineered tankless heritage and Noritz's commercial-tier engineering bleed-down into residential.

For 3–4 person households drop to Noritz NRC83 (8.3 GPM) which saves $250. For larger households or commercial-tier needs, the NRCB199 commercial or commercial-residential cascading.

Where the NRC1111 beats the alternatives

Vs Rinnai RU199iN ($1,645): spec-equivalent. Same 11.1 GPM, same 0.96 UEF, similar warranty. Rinnai built-in Control-R 2.0 WiFi; Noritz optional WiFi via add-on. Rinnai has larger US installer network. Noritz wins on engineering heritage; Rinnai on availability.

Vs Navien NPE-240A2 ($1,499): Navien 11.2 GPM, ComfortFlow buffer, NaviLink WiFi standard. Noritz 11.1 GPM, no buffer, optional WiFi. Navien clearly more feature-loaded at slightly lower price. Choose Noritz only if installer relationship favors it.

Vs Rheem RTGH-95DVLN ($1,499): Rheem 9.5 GPM, 12-year warranty, EcoNet WiFi. Noritz 11.1 GPM, 12-year warranty, optional WiFi. Noritz wins on flow; Rheem wins on built-in WiFi.

Where it falls short

No built-in WiFi — Noritz Connect requires an optional module ($120–$180). The big three competitors (Rinnai, Navien, Rheem) all ship WiFi standard at this tier.

12-year heat exchanger warranty trails Rinnai 15-year and Navien 15-year. Engineering reputation compensates; warranty math doesn't.

US Noritz installer network is smaller than Rinnai/Navien. Strongest in metros with significant Japanese-American population (CA, HI, parts of WA). Sparse in Midwest and Southeast.

Cold-water sandwich without buffer tank. Navien's ComfortFlow is the obvious comparison.

3/4" gas line, PVC venting, annual descaling — same as all condensing tankless.

Install considerations

Verify 3/4" gas line capacity. PVC/CPVC vent up to 75 ft, polypropylene to 100 ft. 120V outlet. Service valves for descaling. Verify Noritz-certified installer locally — fewer than Rinnai/Navien.

Install cost: $1,200–$2,200 like-for-like; $2,900–$4,800 tank-to-tankless.

Maintenance

• Annual descaling required to maintain warranty
• Inlet filter clean annually
• Burner inspection every 3 years

Bottom line

The Noritz NRC1111 is the Japanese-engineering heritage flagship — 11.1 GPM, 0.96 UEF, 12-year warranty. Spec-competitive with Rinnai and Navien flagships; trails on built-in WiFi (optional only) and warranty length (12 vs 15 years). Strongest pick where Noritz installer network is dense (West Coast, Hawaii). For most US buyers, the Rinnai RU199iN or Navien NPE-240A2 are safer defaults given larger service networks.