What it delivers
The RIWORY RWRHT008 85,000 BTU Natural Gas Tankless Water Heater is a non-condensing gas tankless with a 85,000 BTU/h burner and a stated maximum flow of 3.6 GPM.
Flow depends on how cold the incoming water is. Our estimate from its input: 2.9 GPM at a 45°F rise, falling to 1.9 GPM at 70°F, which is less than one 2 GPM shower on a cold-climate winter day. Run your house through the planner.
The line must deliver about 82 cubic feet of natural gas an hour when it fires flat out. The requirement calculator adds it up; a licensed fitter confirms the pipe.
Its exhaust runs hot, so the vent must be the material its manual lists, usually stainless; budget for the vent kit.
Also on the listing: material: Copper, Metal; model: RWRHT008.
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
- 85,000 BTU/h input
- Up to 3.6 GPM
Trade-offs
- Needs a gas line sized for the load
- Stainless venting costs more
- 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 | RWRHT008 | Retailer |
|---|---|---|
| Dimensions (seller) | 13.7"W x 21.3"H | Retailer |
| Voltage | 120 V AC | Retailer |
| Max flow (maker) | 3.6 GPM | Retailer |
| Input (maker) | 85,000 BTU/h | Retailer |
| Material | Copper, Metal | Retailer |
| Fuel | Natural Gas | Retailer |
Rival units at this flow
More gas tankless water heaters rated for similar demand
Final verdict
A practical 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