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Rinnai RU199iN Tankless Water Heater vs Rinnai RX130iN Sensei RX

The RU199iN is the high-capacity pick: 199,000 BTU and up to 11 GPM handle large homes with several showers and appliances running at once. The RX130iN is the smarter, more efficient unit for smaller households, with a 0.97 UEF and Adaptive Gas Valve Technology that switches between natural gas and propane without a conversion kit. Both use condensing stainless steel heat exchangers and carry strong owner reputations for reliability; the RU199iN is the step up when demand is high, the RX130iN when efficiency and fuel flexibility matter more.

  • Choose the Rinnai RU199iN if you have a large home with multiple bathrooms and want maximum hot water output from a single indoor unit.
  • Choose the Rinnai RX130iN if your household demand is moderate and you want higher efficiency plus the option to run propane without a conversion kit.

Prices

  • Rinnai RU199iN Tankless Water Heater: $1,400.00 at SarlKig (last seen Nov 2)
  • Rinnai RX130iN Sensei RX: $899.00 at eBay (last seen Nov 8)
  • Difference: the Rinnai RX130iN Sensei RX is $501.00 cheaper than the Rinnai RU199iN Tankless Water Heater at the latest prices (Nov 2 and Nov 8)
Rinnai
Rinnai RU199iN Condensing Tankless Hot Water Heater (Indoor, Natural Gas)

Rinnai RU199iN Tankless Water Heater

Rinnai RU199iN Condensing Tankless Hot Water Heater (Indoor, Natural Gas)

$1,400.00at SarlKigChecked Nov 2
See all prices and details
Visit SarlKig
Pros
  • High 199,000 BTU output serves several fixtures at once
  • 11 GPM flow suits large homes
  • Ultra Low NOx and Energy Star listed
  • Stainless steel condensing heat exchanger
  • Includes isolation valves and pressure relief valve
Cons
  • Lower 0.93 UEF than the RX130iN
  • Natural gas only, no propane without a conversion kit
  • Wi-Fi needs optional accessories
  • Larger gas supply and venting demands at full input
Rinnai
Rinnai RX130iN Condensing Smart Sense

Rinnai RX130iN Sensei RX

Rinnai RX130iN Condensing Smart Sense

$899.00at eBayChecked Nov 8
See all prices and details
Visit eBay

Store links may earn us a commission.

Pros
  • 0.97 UEF, the more efficient of the two
  • Adaptive Gas Valve handles natural gas or propane without a kit
  • Very low 0.13 GPM activation for small draws
  • Wi-Fi ready with Bluetooth setup in the Rinnai Central app
  • Optional outdoor installation with the RXOVC vent cap
Cons
  • 7.1 GPM and 130,000 BTU limit simultaneous demand
  • Lower output for large homes with multiple bathrooms
  • Smart-Circ recirculation requires a pump or pump kit
  • Taller cabinet than the RU199iN

What separates them

Rinnai RU199iN Tankless Water HeaterRinnai RX130iN Sensei RX
Maximum input199,000 BTU130,000 BTU
Maximum flow rateUp to 11 GPM7.1 GPM
Uniform Energy Factor0.930.97
Fuel flexibilityNatural gas onlyAdaptive Gas Valve switches between natural gas and propane without a conversion kit
Minimum activation flow0.4 GPM0.13 GPM
Smart featuresWi-Fi compatible with optional accessoriesWi-Fi ready, Bluetooth setup through the Rinnai Central app, Smart-Circ capable with a pump kit
Installation locationIndoor only, direct ventIndoor, with optional outdoor install using the RXOVC vent cap
FootprintAbout 26 in tall, 18.5 in wideAbout 30 in tall, 18.5 in wide

Price history

$1,520.00$1,400.00
Nov 1Nov 10
  • Rinnai RU199iN Tankless Water Heater: lowest $1,400.00 on Nov 1 at SarlKig; $1,520.00 on Nov 10.

Prices at every store

Rinnai RU199iN Tankless Water Heater

  • SupplyStop.comNew

    In stock

    $1,537.90Free shippingChecked Nov 9
    Visit SupplyStop.com
  • Rural Energy EnterprisesNew

    In stock

    $1,899.00+ $196.00 shippingChecked Nov 9
    Visit Rural Energy Enterprises
  • Voomi SupplyNew

    In stock

    $1,960.35+ $330.00 shippingChecked Nov 9
    Visit Voomi Supply
  • SarlKigNew

    Availability unknown

    $1,400.00Checked Nov 2
    Visit SarlKig

Also available at

  • SupplyStop.comCheck price at SupplyStop.com
  • Voomi SupplyCheck price at Voomi Supply
All 9 stores and price history →

Rinnai RX130iN Sensei RX

  • Big Frog SupplyNew

    In stockReturn policy

    $1,264.20Checked Nov 8
    Visit Big Frog Supply
  • eBayNew

    Availability unknownSold by elitegoodz (100% positive, 1,200 ratings)Returns: Set by the eBay seller; the eBay Money Back Guarantee covers an item that doesn't arrive or isn't as described.

    $899.00Free shippingChecked Nov 8
    Visit eBay
  • eBayOpen box

    Availability unknownSold by efaucets (99.7% positive, 3,400 ratings)Returns: Set by the eBay seller; the eBay Money Back Guarantee covers an item that doesn't arrive or isn't as described.

    $961.58Free shippingChecked Nov 8
    Visit eBay

Store links may earn us a commission.

All 2 stores and price history →

Specs compared

SpecRinnai RU199iN Tankless Water HeaterRinnai RX130iN Sensei RX
Power SourceNatural GasGas
Product Depth11 19/48 Inches11.4 inch / (291 mm)
Product Width18 1/2 Inches18.5 inch / (470 mm)
Product Height26 19/48 Inches30.11 inch / (762 mm)
ApplicationResidentialResidential
Uniform Energy Factor0.930.97
Energy StarYes—
Flow Rate11 GPM—
Gas TypeNatural Gas—
Installation LocationIndoor—
CSA ListedYes—
Frequency60 Hz—
Show all 40 specsShow fewer specs
SpecRinnai RU199iN Tankless Water HeaterRinnai RX130iN Sensei RX
Cold Water Inlet3/4 Inch—
Hot Water Outlet3/4 Inch—
AHRI CertifiedYes—
Vent TypeDirect Vent—
Minimum Flow Rate0.4 GPM—
Gas Connection Size3/4 Inch—
Mount TypeWall—
Product LineSensei—
Storage TypeTankless—
Energy Star Listed

What reviewers say

Rinnai RU199iN Tankless Water Heater

Owners of Rinnai condensing units generally report steady hot water and lower gas use, with complaints centered on installation cost and maintenance.

What people mention
  • Hot water supplyPraisedOwners say it keeps up with multiple showers and appliances at once.
  • EfficiencyPraisedCondensing operation and Energy Star rating are credited with lower gas use.
  • InstallationCriticisedBuyers report venting, gas line and labor push the installed cost well above the unit price.
  • MaintenanceMixedAnnual descaling is expected, and hard-water owners say skipping it hurts performance.

Questions and answers

Which is better for a large family with several bathrooms?
The RU199iN. Its 199,000 BTU input and up to 11 GPM keep multiple showers and appliances supplied at once. The RX130iN tops out at 7.1 GPM and 130,000 BTU, which suits one or two bathrooms.
Which lasts longer?
Both use condensing stainless steel heat exchangers and have similar Rinnai build quality. Longevity depends more on water quality and annual descaling than on the model, so either can last well over a decade with maintenance.
Is the RX130iN worth stepping up to over the RU199iN?
If your demand is moderate, yes. The RX130iN has a higher 0.97 UEF and switches between natural gas and propane without a conversion kit. The RU199iN is the better step up when you need raw capacity.
Can the RX130iN be installed outdoors?
Yes, with the Rinnai RXOVC outdoor vent cap accessory. The RU199iN is an indoor direct-vent unit only.
Do either include a recirculation pump?
No. Both are sold without a pump. The RX130iN is Smart-Circ capable once a pump or pump accessory kit is installed.
Which handles small hot water draws better?
The RX130iN. It activates at 0.13 GPM versus 0.4 GPM on the RU199iN, so it fires for low-flow tasks like a sink or a warm rinse.

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Buying guides that pick them

  • Best whole-house indoor gas tankless water heaters
Yes
—
Includes PumpNo—
Maximum Input Capacity199000 BTU—
Minimum Input Capacity15000 BTU—
Combustion TypeCondensing—
Ultra Low NOx EmissionsYes—
Minimum BTU—15,000 BTU
Maximum BTU—130000 BTU
Product Weight—54 lb / (24.4 kg)
Maximum Flow Rate—7.1 GPM / (27 L/min)
Gas Connection—3/4 in
Water Connection—3/4 in
Temperature Range—98°F to 140°F
Voltage—120V
Fuel Type—Natural Gas
Product Type—Tankless Water Heater
System Type—Tankless Water Heater
Type Features—Temperature control, Instant heating
Energy Efficiency—0.97 UEF