Tankless Geek original dataset
Verified Tankless Water Heater Specifications
A maintained, source-linked dataset covering all 43 models reviewed by Tankless Geek. It separates manufacturer specifications from retailer customer ratings and records when each model was last checked.
A blank or “not stated” value is intentional. We do not infer a document date or specification that the source record does not provide. Flow changes with temperature rise. Always confirm the performance chart and installation manual for the exact model and revision.
Dataset updated:
| Model | Fuel | Input | Rated flow | Flow by temperature rise | Efficiency | Service requirements | Warranty | Source | Verified |
|---|---|---|---|---|---|---|---|---|---|
| Eemax EEM24027 | Electric | Not stated in the current source record | Up to 5.3 GPM (warm climate) | See manufacturer performance chart | 99% efficiency | Follow the manufacturer installation and maintenance manual | 5 years limited warranty | Primary or best available sourceDocument date: Not stated in the source record | Verification date pending |
| Marey ECO180 | Electric | Not stated in the current source record | 4.0 GPM | See manufacturer performance chart | ≈99% (electric resistance) | Follow the manufacturer installation and maintenance manual | 5 years limited warranty | Primary or best available sourceDocument date: Not stated in the source record | Verification date pending |
| Gasland CE528LP | Propane | Not stated in the current source record | 5.8 GPM | See manufacturer performance chart | ≈0.80 UEF · non-condensing (mfr cites ~96.9% thermal) | Follow the manufacturer installation and maintenance manual | 1-yr free replacement | Primary or best available sourceDocument date: Not stated in the source record | Verification date pending |
| FOGATTI Electric 14kW | Electric | Not stated in the current source record | 3.3 GPM | See manufacturer performance chart | 98% (electric resistance) | Follow the manufacturer installation and maintenance manual | 3 yrs | Primary or best available sourceDocument date: Not stated in the source record | Verification date pending |
| Camplux 5L Portable | Propane | Not stated in the current source record | 1.32 GPM | See manufacturer performance chart | ≈80% thermal · non-condensing (portable) | Follow the manufacturer installation and maintenance manual | 1 year limited warranty | Primary or best available sourceDocument date: Not stated in the source record | Verification date pending |
| Mizudo 4.3 | Natural Gas | Not stated in the current source record | 4.3 GPM | See manufacturer performance chart | ≈0.81 UEF · non-condensing | Follow the manufacturer installation and maintenance manual | 1–3 yrs | Primary or best available sourceDocument date: Not stated in the source record | Verification date pending |
| EcoSmart ECO 11 | Electric | Not stated in the current source record | 2.7 GPM | See manufacturer performance chart | 99.8% | Follow the manufacturer installation and maintenance manual | Limited lifetime (exchanger & electronics, residential — conditions apply) | Primary or best available sourceDocument date: Not stated in the source record | Verification date pending |
| Stiebel Eltron Tempra 36 Plus | Electric | Not stated in the current source record | 7.0 GPM | See manufacturer performance chart | 99% efficiency | Follow the manufacturer installation and maintenance manual | 7 years leakage, 3 years parts | Primary or best available sourceDocument date: Not stated in the source record | Verification date pending |
| EcoSmart ECO 18 | Electric | Not stated in the current source record | 3.5 GPM | See manufacturer performance chart | 99.8% (electric resistance) | Follow the manufacturer installation and maintenance manual | Limited lifetime (exchanger & electronics, residential — conditions apply) | Primary or best available sourceDocument date: Not stated in the source record | Verification date pending |
| Eccotemp i12 | Propane | Not stated in the current source record | 4.0 GPM | See manufacturer performance chart | ≈79% · non-condensing | Follow the manufacturer installation and maintenance manual | 2 years limited warranty | Primary or best available sourceDocument date: Not stated in the source record | Verification date pending |
| Noritz EZ111DV | Natural Gas | Not stated in the current source record | 11.1 GPM | See manufacturer performance chart | 0.98 UEF · condensing | Follow the manufacturer installation and maintenance manual | 25 years heat exchanger, 5 years parts | Primary or best available sourceDocument date: Not stated in the source record | Verification date pending |
| Marey GA10LP | Propane | Not stated in the current source record | 3.1 GPM | See manufacturer performance chart | ≈87% thermal · non-condensing (battery ignition, not a pilot) | Follow the manufacturer installation and maintenance manual | 5-yr limited | Primary or best available sourceDocument date: Not stated in the source record | Verification date pending |
| Rinnai RU180eP | Propane | Not stated in the current source record | 10.0 GPM | See manufacturer performance chart | 0.95 UEF | Follow the manufacturer installation and maintenance manual | 15-yr heat exchanger (or 12,000 hrs) · 5-yr parts · 1-yr labor | Primary or best available sourceDocument date: Not stated in the source record | Verification date pending |
| Rinnai RE140iN | Natural Gas | Not stated in the current source record | 5.3 GPM | See manufacturer performance chart | 0.81 UEF | Follow the manufacturer installation and maintenance manual | 15-yr heat exchanger (or 12,000 hrs) · 5-yr parts · 1-yr labor | Primary or best available sourceDocument date: Not stated in the source record | Verification date pending |
| Rinnai V65iN | Natural Gas | Not stated in the current source record | 6.5 GPM | See manufacturer performance chart | 0.80 UEF · non-condensing | Follow the manufacturer installation and maintenance manual | 10-yr heat exchanger · 5-yr parts · 1-yr labor | Primary or best available sourceDocument date: Not stated in the source record | Verification date pending |
| Rheem IKONIC S84iN | Natural Gas | Not stated in the current source record | 8.4 GPM | See manufacturer performance chart | 0.94 UEF | Follow the manufacturer installation and maintenance manual | 12-yr heat exchanger (15-yr with registration) · 5-yr parts · 1-yr labor | Primary or best available sourceDocument date: Not stated in the source record | Verification date pending |
| Rheem RTEX-24 | Electric | Not stated in the current source record | 5.9 GPM | See manufacturer performance chart | 99.8% | Follow the manufacturer installation and maintenance manual | 5-yr heating chamber · 1-yr parts | Primary or best available sourceDocument date: Not stated in the source record | Verification date pending |
| EcoSmart ECO 36 | Electric | Not stated in the current source record | 6.0 GPM | See manufacturer performance chart | 99.8% (electric resistance) | Follow the manufacturer installation and maintenance manual | Limited lifetime (exchanger & electronics, residential — conditions apply) | Primary or best available sourceDocument date: Not stated in the source record | Verification date pending |
| Rheem RTG-70XLN-3 | Natural Gas | Not stated in the current source record | 7.0 GPM | See manufacturer performance chart | 0.82 UEF · non-condensing | Follow the manufacturer installation and maintenance manual | 12-yr heat exchanger (15-yr with registration) · 5-yr parts · 1-yr labor | Primary or best available sourceDocument date: Not stated in the source record | Verification date pending |
| Fogatti 7.5 GPM | Propane | Not stated in the current source record | 7.5 GPM | See manufacturer performance chart | ≈0.81 UEF · non-condensing | Follow the manufacturer installation and maintenance manual | 5-yr heat exchanger · 2-yr parts | Primary or best available sourceDocument date: Not stated in the source record | Verification date pending |
| A.O. Smith ATI-540H-N | Natural Gas | Not stated in the current source record | Up to 10 GPM | See manufacturer performance chart | ≈0.93 UEF · condensing | Follow the manufacturer installation and maintenance manual | 15-yr heat exchanger (residential) · 5-yr parts · 1-yr labor | Primary or best available sourceDocument date: Not stated in the source record | Verification date pending |
| FOGATTI Instagas 170 LP | Propane | Not stated in the current source record | 7.5 GPM | See manufacturer performance chart | ≈0.81 UEF · non-condensing | Follow the manufacturer installation and maintenance manual | 5-yr heat exchanger · 2-yr parts | Primary or best available sourceDocument date: Not stated in the source record | Verification date pending |
| Bosch Therm 940 ES | Natural Gas | Not stated in the current source record | 9.4 GPM | See manufacturer performance chart | ≈83% thermal · non-condensing · ENERGY STAR | Follow the manufacturer installation and maintenance manual | 15-yr heat exchanger · 5-yr parts (residential) | Primary or best available sourceDocument date: Not stated in the source record | Verification date pending |
| Gasland BE158 | Propane | Not stated in the current source record | 1.58 GPM | See manufacturer performance chart | ≈80% thermal · non-condensing (portable) | Follow the manufacturer installation and maintenance manual | 1 year limited warranty | Primary or best available sourceDocument date: Not stated in the source record | Verification date pending |
| Eccotemp 45HI | Propane | Not stated in the current source record | 6.8 GPM | See manufacturer performance chart | ≈0.80 UEF · non-condensing | Follow the manufacturer installation and maintenance manual | 10-yr heat exchanger · 5-yr parts | Primary or best available sourceDocument date: Not stated in the source record | Verification date pending |
| Takagi T-H3-DV-N | Natural Gas | Not stated in the current source record | 10.0 GPM | See manufacturer performance chart | 0.95 UEF | Follow the manufacturer installation and maintenance manual | 15 years heat exchanger, 5 years parts | Primary or best available sourceDocument date: Not stated in the source record | Verification date pending |
| Ranein 18kW Electric | Electric | Not stated in the current source record | Up to 4.3 GPM (manufacturer rating at low temperature rise) | See manufacturer performance chart | ≈99% (electric resistance) | Follow the manufacturer installation and maintenance manual | 3 yrs | Primary or best available sourceDocument date: Not stated in the source record | Verification date pending |
| Atmor ThermoPro 24kW | Electric | Not stated in the current source record | Up to 4.6 GPM (warm climate) | See manufacturer performance chart | 99% efficiency | Follow the manufacturer installation and maintenance manual | 7-yr leakage / 2-yr parts | Primary or best available sourceDocument date: Not stated in the source record | Verification date pending |
| Navien NPE-240S | Natural Gas | Not stated in the current source record | 11.2 GPM | See manufacturer performance chart | 0.96 UEF · condensing | Follow the manufacturer installation and maintenance manual | 15 years heat exchanger, 5 years parts | Primary or best available sourceDocument date: Not stated in the source record | Verification date pending |
| Noritz NR66-OD | Natural Gas | Not stated in the current source record | 6.6 GPM | See manufacturer performance chart | ≈0.83 EF · non-condensing | Follow the manufacturer installation and maintenance manual | 12 years heat exchanger, 5 years parts | Primary or best available sourceDocument date: Not stated in the source record | Verification date pending |
| Rinnai RU160iN | Natural Gas | Not stated in the current source record | 9.0 GPM | See manufacturer performance chart | 0.92 UEF · condensing (ENERGY STAR) | Follow the manufacturer installation and maintenance manual | 15-yr heat exchanger (or 12,000 hrs) · 5-yr parts · 1-yr labor | Primary or best available sourceDocument date: Not stated in the source record | Verification date pending |
| Rinnai V53DeN | Natural Gas | Not stated in the current source record | 5.3 GPM | See manufacturer performance chart | 0.81 UEF · non-condensing | Follow the manufacturer installation and maintenance manual | 10-yr heat exchanger · 5-yr parts · 1-yr labor | Primary or best available sourceDocument date: Not stated in the source record | Verification date pending |
| Rinnai V53DeP | Propane | Not stated in the current source record | 5.3 GPM | See manufacturer performance chart | 0.82 UEF | Follow the manufacturer installation and maintenance manual | 10-yr heat exchanger · 5-yr parts · 1-yr labor | Primary or best available sourceDocument date: Not stated in the source record | Verification date pending |
| Rheem RTG-70DVLN-3 | Natural Gas | Not stated in the current source record | 7.0 GPM | See manufacturer performance chart | 0.82 UEF · non-condensing | Follow the manufacturer installation and maintenance manual | 12-yr heat exchanger (15-yr with registration) · 5-yr parts · 1-yr labor | Primary or best available sourceDocument date: Not stated in the source record | Verification date pending |
| A.O. Smith Signature 6.6 GPM | Natural Gas | Not stated in the current source record | 6.6 GPM | See manufacturer performance chart | ≈0.94 UEF · condensing · ENERGY STAR | Follow the manufacturer installation and maintenance manual | 15-yr heat exchanger · 5-yr parts · 1-yr labor | Primary or best available sourceDocument date: Not stated in the source record | Verification date pending |
| Bosch Therm 830 ES | Propane | Not stated in the current source record | 8.3 GPM | See manufacturer performance chart | ≈82% thermal · non-condensing · ENERGY STAR | Follow the manufacturer installation and maintenance manual | 15-yr heat exchanger · 5-yr parts (residential) | Primary or best available sourceDocument date: Not stated in the source record | Verification date pending |
| Camplux 16L Outdoor | Propane | Not stated in the current source record | 4.22 GPM | See manufacturer performance chart | ≈80–84% thermal · non-condensing (portable) | Follow the manufacturer installation and maintenance manual | 2 years limited warranty | Primary or best available sourceDocument date: Not stated in the source record | Verification date pending |
| Takagi T-KJr2-IN-NG | Natural Gas | Not stated in the current source record | 6.6 GPM | See manufacturer performance chart | 0.81 UEF · non-condensing | Follow the manufacturer installation and maintenance manual | 10 years heat exchanger, 5 years parts | Primary or best available sourceDocument date: Not stated in the source record | Verification date pending |
| Fogatti 18 kW | Electric | Not stated in the current source record | 4.4 GPM | See manufacturer performance chart | 98% efficiency | Follow the manufacturer installation and maintenance manual | 5 years heat exchanger, 2 years parts | Primary or best available sourceDocument date: Not stated in the source record | Verification date pending |
| Ranein 4.3 | Natural Gas | Not stated in the current source record | 4.3 GPM | See manufacturer performance chart | ≈0.79 EF · non-condensing | Follow the manufacturer installation and maintenance manual | 1–5 yrs | Primary or best available sourceDocument date: Not stated in the source record | Verification date pending |
| Stiebel Tempra 29 Plus | Electric | Not stated in the current source record | Up to ~5.6 GPM (mfr rating at a mild rise) | See manufacturer performance chart | 99% | Follow the manufacturer installation and maintenance manual | 7 yrs leakage, 3 yrs parts | Primary or best available sourceDocument date: Not stated in the source record | Verification date pending |
| Rheem RTGH-84DVLN | Natural Gas | Not stated in the current source record | 8.4 GPM | See manufacturer performance chart | 0.93 UEF | Follow the manufacturer installation and maintenance manual | 12-yr heat exchanger (15-yr with registration) · 5-yr parts · 1-yr labor | Primary or best available sourceDocument date: Not stated in the source record | Verification date pending |
| Marey 24L | Natural Gas | Not stated in the current source record | 7.5 GPM | See manufacturer performance chart | ≈0.82 EF · non-condensing | Follow the manufacturer installation and maintenance manual | 5-yr limited (parts, not labor) | Primary or best available sourceDocument date: Not stated in the source record | Verification date pending |