Is the RXP199iN big enough for a whole house?

At 199,000 BTU it handles a large home with multiple bathrooms, but simultaneous demand from several showers plus appliances can still outrun it in cold climates. Size it against your incoming water temperature and fixture count.

Does it work with propane out of the box?

Yes. The Smart Sense gas valve adjusts to natural gas or propane without a conversion kit, though the installer sets the gas type during setup.

Can it be installed outdoors?

Yes, with the Versa-Vent outdoor vent cap. Without that accessory it is an indoor unit.

Do I need the RWM200 module?

Only for full recirculation control such as timers and push-button activation. The pump and usage learning work without it, but scheduling is limited.

How does it compare with the non-condensing RX199?

The RXP199iN adds condensing efficiency and the built-in recirculation pump. The RX199 is simpler and cheaper to install but less efficient and lacks smart recirculation.

What maintenance does it need?

Flush the heat exchanger periodically using the quick flush ports; the unit detects lime buildup and prompts you. In hard-water areas, flush more often.

Where is the Rinnai RXP199iN Tankless Water Heater cheapest?

At Lowe's, for $2,067.80, as of our latest check.

What do buyers say about the Rinnai RXP199iN Tankless Water Heater?

Rated 4.1 out of 5 from 990 ratings.

Where can I buy the Rinnai RXP199iN Tankless Water Heater?

3 stores we checked sell it, including Walmart, Lowe's, The Home Depot.

Rinnai RXP199iN Tankless Water Heater

Best price now

$2,067.80at Lowe'sChecked 16 h ago

Compared across 3 stores. Prices are checked against each store and labelled with when. Store links may earn us a commission. Price via Klarna.

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What reviewers say

4.1 / 5990 ratings

Owners rate it well overall, praising endless hot water and the efficiency gains over tank units. Complaints center on installation complexity, the extra module needed for full recirculation control, and occasional error codes.

What people mention

Hot water supplyPraisedOwners say it keeps up with several showers and appliances at once without running cold.
EfficiencyPraisedReviewers report lower gas bills after switching from a tank heater.
InstallationCriticisedOwners say professional install, venting and gas line work make the job expensive and involved.
RecirculationMixedThe built-in pump is liked, but full scheduling and control require the separate RWM200 module.
ReliabilityMixedSome owners report error codes and service calls, while others run it for years without trouble.
App setupCriticisedThe Bluetooth app is described as basic and mainly useful for registration and quick setup.

About the Rinnai RXP199iN Tankless Water Heater

Enjoy an endless supply of hot water with Rinnai's Sensei Super High Efficiency Plus 98 UEF condensing tankless water heater. Only the size of a small suitcase, this compact model can be easily converted to use either Natural Gas or Propane. Perfect for any location, this model allows for either indoor installation or outdoor installation with buying of the Versa Vent adaptor. This model also comes with a built-in recirculation pump that learns your hot water usage patterns to more effectively provide instant hot water when needed.Features One model converts from indoor to outdoor installation using Versa-Vent outdoor vent cap Smart Sense Gas Valve Technology adjusts to either Natural Gas or Propane - no conversion kit required Professional installation recommended Smart Connect via Bluetooth to your device using your smartphone and the Rinnai Central App for Quick Setup and Registration Recirculation: with a built in pump, the RXP199iN features Smart Circ Intelligent Recirculation which learns your hot water usage patterns, schedules accordingly and can be controlled via timers and push buttons (requires RWM200 wireless module) Industry leading 2 in. venting up to 75 feet Quick flush simplified flushing and lime detection Super High Efficiency of 0.98 UEF, Meets Energy Star 5.0 Water Heater Features: Digital Display, Energy Usage Tracking, Freeze Protection, Overheat Protection, Wall MountedSpecifications Width: 18.5 in. Depth: 11.37 in. Height: 30.12 in. Connection Size: 0.75 in. Gas Connection: 0.75 in. Color: Silver Amperage: 4 A Series: Sensei RXP Super High Efficiency Plus Max PSI: 150 psi Gallons per Minute: 11 gal/min Temperature Range: 98 - 185 °F Style: Tankless Water Heater Wattage: 98 W Voltage: 120 V Min PSI: 15 psi Connection Style: NPT BTU: 199000 Fuel Type: Natural Gas or Liquid Propane Certifications: AHRI, CSA, Energy Star Country of Origin: Japan - SKU: NXDT219905