What it delivers
The Ranein RHO13K-NG 130,000 BTU Natural Gas Outdoor Tankless Water Heater is an outdoor gas tankless with a 130,000 BTU/h burner and a stated maximum flow of 5.3 GPM.
Expect about 2.9 GPM with cold winter water (a 70°F rise) and 4.4 GPM when the inlet is milder (45°F rise); that is 1 shower at 2 GPM in January. Check it against your own fixtures.
The line must deliver about 125 cubic feet of natural gas an hour when it fires flat out. The requirement calculator adds it up; a licensed fitter confirms the pipe.
Outdoor units vent straight out of the cabinet, which saves the vent run and the wall penetration; plan for freeze protection and a pipe cover where winters bite.
Listed details: features: LED Display; connections: 3/4" npt; material: Natural Gas; model: RHO13K-NG; warranty: 2 Year Manufacturer.
The listing gives dimensions of 14.17 in (W) x 23.15 in (H) and a weight of 34 lb.
Warranty, per the listing: 2 Year Manufacturer.
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
- 130,000 BTU/h input
- Up to 5.3 GPM
- No vent pipe
Trade-offs
- Gas line may need upsizing
- Needs freeze protection outdoors
- Needs periodic descaling
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 | RHO13K-NG | Retailer |
|---|---|---|
| Dimensions (seller) | 14.17"W x 23.15"H | Retailer |
| Features (seller) | LED Display | Retailer |
| Voltage | 120 V AC | Retailer |
| Max flow (maker) | 5.3 GPM | Retailer |
| Input (maker) | 130,000 BTU/h | Retailer |
| Product weight | 34 lb | Retailer |
| Material | Natural Gas | Retailer |
| Warranty | 2 Year Manufacturer | Retailer |
| Fuel | Natural Gas | Retailer |
| Connections | 3/4" npt | Retailer |
Rival units at this flow
More gas tankless water heaters rated for similar demand
- FOGATTI 120S Propane Outdoor Tankless Water Heater
- Camplux WA528 150,000 BTU Natural Gas Outdoor Tankless Water Heater
- Camplux WA686LP 199,000 BTU Propane Outdoor Tankless Water Heater
- Camplux WA686M-NG 199,000 BTU Natural Gas Outdoor Tankless Water Heater
Full gas tankless water heaters spec grid · Every Ranein unit in the catalog
Final verdict
A well-specified outdoor gas tankless for one shower at a time in cold climates.
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