What it delivers
The Ranein RHO19K-LPG 190,000 BTU Propane Outdoor Tankless Water Heater is an outdoor gas tankless with a 190,000 BTU/h burner and a stated maximum flow of 8.5 GPM.
Worked out from its input, it delivers roughly 6.5 GPM when the water only has to rise 45°F, and 4.2 GPM at a 70°F winter rise: 3 showers at 2 GPM in summer, 2 showers at 2 GPM in winter. Run your house through the planner.
Gas load at full fire: about 2.1 gallons of propane 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.
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.
Other listed details: features: LED Display; connections: 3/4" npt; material: Propane; model: RHO19K-LPG; warranty: 2 Year Manufacturer.
The listing gives dimensions of 15.08 in (W) x 24.25 in (H) and a weight of 44 lb.
Warranty, per the listing: 2 Year Manufacturer.
Right unit for this house?
Install it when
- Houses running 2 showers at once in winter
- Propane homes
- Replacing a gas tank heater
Look at another unit when
- More than 2 winter showers at once
- Homes without a gas line
Strengths and trade-offs
Strengths
- 190,000 BTU/h input
- Up to 8.5 GPM
- No vent pipe
Trade-offs
- Gas pipe sizing to confirm
- Needs freeze protection outdoors
- Annual flushing on hard water
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 | RHO19K-LPG | Retailer |
|---|---|---|
| Dimensions (seller) | 15.08"W x 24.25"H | Retailer |
| Features (seller) | LED Display | Retailer |
| Voltage | 120 V AC | Retailer |
| Max flow (maker) | 8.5 GPM | Retailer |
| Input (maker) | 190,000 BTU/h | Retailer |
| Product weight | 44 lb | Retailer |
| Material | Propane | Retailer |
| Warranty | 2 Year Manufacturer | Retailer |
| Fuel | Propane | Retailer |
| Connections | 3/4" npt | Retailer |
Rival units at this flow
More gas tankless water heaters rated for similar demand
- MIZUDO HS180A0W-NG 180,000 BTU Natural Gas Outdoor Tankless Water Heater
- Westinghouse HS180A0G-LP 180,000 BTU Propane Outdoor Tankless Water Heater
- Rheem RTG-70XLP-3 160,000 BTU Propane Outdoor Tankless Water Heater
- Rheem RTG-70XLN-3 160,000 BTU Natural Gas Outdoor Tankless Water Heater
Full gas tankless water heaters spec grid · Every Ranein unit in the catalog
Final verdict
A sensible outdoor gas tankless for houses running 2 showers at once in winter.
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