What it delivers
The RIWORY RWRHT010 102,000 BTU Natural Gas Tankless Water Heater is a non-condensing gas tankless with a 102,000 BTU/h burner and a stated maximum flow of 4.3 GPM.
Expect about 2.2 GPM with cold winter water (a 70°F rise) and 3.5 GPM when the inlet is milder (45°F rise); that is 1 shower at 2 GPM in January. Run your house through the planner.
Gas load at full fire: about 98 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.
Listed details: connections: 3/4" npt; material: Copper, Metal; model: RWRHT010.
The listing gives dimensions of 13.7 in (W) x 21.3 in (H).
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
- 102,000 BTU/h input
- Up to 4.3 GPM
Trade-offs
- Gas pipe sizing to confirm
- Stainless venting costs more
- 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 | RWRHT010 | Retailer |
|---|---|---|
| Dimensions (seller) | 13.7"W x 21.3"H | Retailer |
| Voltage | 120 V AC | Retailer |
| Max flow (maker) | 4.3 GPM | Retailer |
| Input (maker) | 102,000 BTU/h | Retailer |
| Material | Copper, Metal | Retailer |
| Fuel | Natural Gas | Retailer |
| Connections | 3/4" npt | Retailer |
Rival units at this flow
More gas tankless water heaters rated for similar demand
Final verdict
A well-specified non-condensing gas tankless for one shower at a time in cold climates.
Buy this unit
Our links open this exact model's product page. Prices and stock change; check what's included before you order.
Each button opens this exact model. We may earn a commission on tracked links; it never changes what we publish. Disclosure