What it delivers
The Rinnai RE140eN Natural Gas Tankless Water Heater is a non-condensing gas tankless with a 140,000 BTU/h burner and a stated maximum flow of 5.3 GPM.
At a 45°F rise (mild inlet water to a 120°F set point) it holds about 4.8 GPM, 2 showers at 2 GPM; in winter, at a 70°F rise, about 3.1 GPM, 1 shower at 2 GPM. Size it to your fixtures and climate.
Gas load at full fire: about 135 cubic feet of natural gas an hour. An older half-inch line that already feeds a furnace often can't spare that, so have a gas fitter check the pipe size and run.
Its exhaust runs hot, so the vent must be the material its manual lists, usually stainless; budget for the vent kit.
From the listing: features: LED Display; connectivity: WiFi; material: Stainless Steel; model: RE140eN; warranty: 1 Year Labor, 5 Year Parts.
The listing gives dimensions of 14.05 in (W) x 24.64 in (H) and a weight of 22.75 kg.
Warranty, per the listing: 1 Year Labor, 5 Year Parts.
Right unit for this house?
Install it when
- One shower at a time in cold climates
- Replacing a gas tank heater
Look at another unit when
- More than 1 winter shower at once
- Homes without a gas line
Strengths and trade-offs
Strengths
- 140,000 BTU/h input
- Up to 5.3 GPM
Trade-offs
- Gas pipe sizing to confirm
- Stainless venting costs more
- Scale builds up without flushing
Install limits
- Figures are the maker's or seller's own. Flow at a rise is our estimate from the input; gas, venting and electrical work needs a licensed professional.
Rated performance
Every figure below comes from the source shown in brackets. Where the maker doesn't state something, we say so instead of estimating.
| Model number | RE140eN | Retailer |
|---|---|---|
| Dimensions (seller) | 14.05"W x 24.64"H | Retailer |
| Features (seller) | LED Display | Retailer |
| Voltage | 120 V AC | Retailer |
| Max flow (maker) | 5.3 GPM | Retailer |
| Input (maker) | 140,000 BTU/h | Retailer |
| Product weight | 22.75 kg | Retailer |
| Material | Stainless Steel | Retailer |
| Warranty | 1 Year Labor, 5 Year Parts | Retailer |
| Fuel | Natural Gas | Retailer |
| Condensing | non-condensing | Retailer |
| Connectivity | WiFi | Retailer |
Rival units at this flow
More gas tankless water heaters rated for similar demand
- Rinnai RE180eN Natural Gas Tankless Water Heater
- Rinnai RE180iN Natural Gas Tankless Water Heater
- SNDOAS IF.JSQ25-B13NA Natural Gas Tankless Water Heater
- VEVOR JSQ30-A 100,000 BTU Tankless Water Heater
Full gas tankless water heaters spec grid · Every Rinnai unit in the catalog
Final verdict
A solid non-condensing gas tankless for one shower at a time in cold climates.
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