What it delivers
The Rinnai CX199iN 199,000 BTU Condensing Tankless Water Heater is a condensing gas tankless with a 199,000 BTU/h burner and a stated maximum flow of 11.1 GPM.
Worked out from its input, it delivers roughly 8.4 GPM when the water only has to rise 45°F, and 5.4 GPM at a 70°F winter rise: 4 showers at 2 GPM in summer, 2 showers at 2 GPM in winter. Check it against your own fixtures.
Gas load at full fire: about 2.2 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.
It recovers heat from its own exhaust, so it runs plastic venting and needs a condensate drain; check the vent lengths its manual allows.
Other listed details: features: Smart Connect, Smart Sense Gas Control, Quick Flush; connectivity: WiFi; model: CX199iN; warranty: 1 Year Labor, 5 Year Parts.
The listing gives dimensions of 18.5 in (W) x 30.11 in (H) and a weight of 27.2 kg.
Warranty, per the listing: 1 Year Labor, 5 Year Parts.
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
- 199,000 BTU/h input
- Up to 11.1 GPM
- Condensing efficiency
Trade-offs
- Gas pipe sizing to confirm
- Needs a condensate drain
- 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 | CX199iN | Retailer |
|---|---|---|
| Dimensions (seller) | 18.5"W x 30.11"H | Retailer |
| Features (seller) | Smart Connect, Smart Sense Gas Control, Quick Flush | Retailer |
| Voltage | 120 V | Retailer |
| Max flow (maker) | 11.1 GPM | Retailer |
| Input (maker) | 199,000 BTU/h | Retailer |
| Product weight | 27.2 kg | Retailer |
| Warranty | 1 Year Labor, 5 Year Parts | Retailer |
| Fuel | propane | Retailer |
| Condensing | condensing | Retailer |
| Connectivity | WiFi | Retailer |
Rival units at this flow
More gas tankless water heaters rated for similar demand
- Noritz NRC66DVNG Natural Gas Condensing Tankless Water Heater
- Rinnai RUR199iN Natural Gas Condensing Tankless Water Heater
- Noritz NRC71DVNG Natural Gas Condensing Tankless Water Heater
- Rinnai RXP160iN Condensing Tankless Water Heater
Full gas tankless water heaters spec grid · Every Rinnai unit in the catalog
Final verdict
A sensible condensing gas tankless for houses running 2 showers at once in winter.
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