Rinnai Sensei RX199iN Tankless Water Heater vs Rinnai RX130iN Sensei RX

Both are Rinnai Sensei RX condensing tankless units with the same cabinet, the same Adaptive Gas Valve that switches between natural gas and propane without a kit, and the same Smart-Circ and Wi-Fi readiness. The RX199iN is the bigger unit: about 11.1 GPM and 199,000 BTU, enough for two or three showers plus a dishwasher at once. The RX130iN tops out near 7.1 GPM and 130,000 BTU, which suits one to two bathrooms. Owners of the RX line report solid build and quiet operation; the common complaint is that neither includes a recirculation pump, so instant hot water needs the accessory.

• Choose the Rinnai RX199iN if you have a large home with three or more bathrooms, a big tub or simultaneous shower and appliance use.
• Choose the Rinnai RX130iN if you have one or two bathrooms and a moderate hot-water load, and want the same platform in a smaller capacity.