| Attribute | Details |
|---|---|
| Make | Rinnai |
| Series | SENSEI® RX Series |
| Model | RX199iN |
| Product Type | High-Efficiency Condensing Tankless Water Heater |
| Fuel Type | Natural Gas or Propane |
| Fuel Adaptation | Smart Sense™ Adaptive Gas-Valve Technology; No Separate Conversion Kit Required |
| Maximum Heating Input | 199,000 BTU/h |
| Minimum Heating Input | 15,000 BTU/h |
| Maximum Hot-Water Flow Rate | Up to 11.1 GPM (42 L/min) |
| Uniform Energy Factor | 0.98 UEF |
| ENERGY STAR® Certified | Yes |
| Installation Location | Indoor or Outdoor |
| Outdoor Installation | Requires the Separately Sold Versa-Vent™ Outdoor Vent Cap |
| Mounting Type | Wall Mounted |
| Recirculation Capable | Yes |
| Integrated Recirculation Pump | No |
| Wi-Fi Capable | Yes |
| Smart Installation Setup | Smart Connect™ Bluetooth Setup Through the Rinnai Central™ App |
| Maintenance Design | Quick Flush™ Feature for Simplified Periodic Flushing |
| Emissions Rating | Ultra-Low NOx |
| Gas Connection | 3/4 Inch |
| Cold-Water Inlet | 3/4 Inch |
| Hot-Water Outlet | 3/4 Inch |
| Condensate Drain | 1/2-Inch NPT |
| Dimensions (W × H × D) | 18.5 × 30.11 × 11.4 Inches |
| Unit Weight | 55 lb |
| Application | Residential and Commercial Domestic Hot-Water Applications |
| Suitable For | Larger Homes and High-Demand Applications When Professionally Sized |
| Residential Warranty | 15-Year or 12,000-Hour Limited Heat-Exchanger Warranty and 5-Year Limited Parts Warranty |
| Commercial Warranty | 8-Year or 12,000-Hour Limited Heat-Exchanger Warranty and 5-Year Limited Parts Warranty |
The Rinnai SENSEI® RX199iN is a high-capacity condensing tankless water heater designed to provide continuous, on-demand hot water for appropriately sized homes and demanding domestic hot-water applications. With a heating range of 15,000 to 199,000 BTU/h and a maximum rated flow of up to 11.1 GPM, it is the most powerful model in the Rinnai RX series.
Unlike a conventional storage tank that continually maintains a supply of heated water, the RX199iN operates when hot water is required. Its advanced condensing technology captures additional heat from combustion gases, helping the system achieve an efficient 0.98 Uniform Energy Factor while reducing standby energy losses.
Rinnai Smart Sense™ adaptive gas-valve technology allows the RX199iN to operate with either natural gas or propane without requiring a separate conversion kit. The system can be configured by a qualified installer for the available household fuel supply, providing greater installation flexibility.
The compact wall-mounted cabinet measures approximately 30.11 inches high, 18.5 inches wide and 11.4 inches deep. It can be installed indoors or converted for outdoor installation using the separately sold Versa-Vent™ outdoor vent-cap accessory, making it suitable for a wide range of residential layouts.
The RX199iN is recirculation capable and can support a compatible hot-water recirculation system for faster hot-water delivery when properly designed. It is also Wi-Fi capable for integration with supported Rinnai controls and accessories. Smart Connect™ helps qualified installers complete system setup and registration through the Rinnai Central™ app, while Quick Flush™ simplifies periodic maintenance.
Key Features
199,000 BTU/h Maximum Heating Input
Delivers high-capacity water heating for larger households and demanding applications when professionally sized.
Maximum Flow Rate up to 11.1 GPM
Supports substantial simultaneous hot-water demand. Actual flow depends on incoming-water temperature, required temperature rise, water pressure and total fixture demand.
0.98 UEF High-Efficiency Performance
Uses advanced condensing technology to recover additional heat and reduce the standby energy losses associated with conventional storage tanks.
ENERGY STAR® Certified
Meets ENERGY STAR requirements for efficient residential water-heating performance.
Continuous On-Demand Hot Water
Heats water when it is required and provides a continuous supply when properly sized for the property’s hot-water needs.
Natural Gas or Propane Operation
Smart Sense™ adaptive gas-valve technology supports natural gas and propane without requiring a separate fuel-conversion kit.
Indoor or Outdoor Installation
Suitable for indoor installation or outdoor installation using the separately sold Versa-Vent™ outdoor vent-cap accessory.
Compact Wall-Mounted Design
Provides substantial heating capacity in a space-saving cabinet measuring approximately 30.11 × 18.5 × 11.4 inches.
Recirculation Capable
Supports a compatible hot-water recirculation system for quicker delivery when professionally designed and installed.
Wi-Fi Capable
Can be integrated with supported Rinnai controls and accessories for convenient system management.
Smart Connect™ Installer Setup
Allows qualified installers to use Bluetooth® and the Rinnai Central™ app for simplified setup and product registration.
Quick Flush™ Maintenance Design
Helps simplify the periodic flushing needed to maintain efficient tankless water-heater operation.
Ultra-Low NOx Operation
Designed to reduce nitrogen-oxide emissions while maintaining efficient gas-fired water heating.
Residential Warranty Protection
Includes a 15-year or 12,000-hour limited heat-exchanger warranty and a five-year limited parts warranty for qualifying residential applications. Manufacturer terms and conditions apply.
Why Buy the Rinnai RX199iN Tankless Water Heater?
The Rinnai SENSEI RX199iN is an excellent option for homeowners who need high-capacity hot-water performance without the floor-space requirements of a conventional storage tank. Its 199,000 BTU/h maximum input, maximum 11.1 GPM rating, 0.98 UEF and ENERGY STAR® certification provide a strong combination of output, efficiency and everyday comfort.
Natural gas and propane compatibility, indoor or outdoor installation flexibility, recirculation capability and smart installer features make the RX199iN suitable for many professionally designed hot-water systems. Contact Jimmy HVAC for a free quote and professional assessment to confirm whether this model is correctly sized for your household.
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Customer Reviews
15 reviews for Rinnai SENSEI RX199iN 199,000 BTU 11.1 GPM Condensing Tankless Water Heater
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Choosing the right heating, cooling or hot water system is an important decision for your home. Jimmy HVAC helps homeowners explore suitable equipment, understand their options and arrange professional installation.
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Jordan MacArthur –
Overall satisfied. Installation went smoothly, though the wait time was longer than expected.
Elena Petrova –
We’ve noticed better temperature control compared to our old system. So far, no complaints.
Ryan Kapoor –
Service was efficient and straightforward. No unnecessary add-ons pushed.
Monique Lefebvre –
Clean installation and no mess left behind. The RX199 has been stable so far.
Trevor Hammond –
Unit works as expected. Would’ve liked a bit more guidance on maintenance.
Ayesha Malik –
Hot water is reliable even during busy mornings. Took a couple days to get the appointment booked.
Patrick O’Sullivan –
Pricing was fair, though not the cheapest option. Installation team was respectful and on time.
Naomi Silver –
Switched from a tank system to the Rinnai RX199. Space-saving design is a big plus.
Lucas Martel –
Good performance so far. Instructions could have been explained a bit slower.
Danielle Porter –
Install took most of the day, but everything was tested before they left. Unit runs quietly.
Faisal Rahman –
Service was quick once scheduled. The RX199 handles two showers without trouble.
Rebecca Nolan –
Jimmy HVAC explained the options clearly and didn’t rush the install. Pricing was in line with other quotes.
Michael Chen –
Water pressure and temperature are consistent. There is a brief delay upstairs, but overall it works well.
Claire Dumont –
Had the Rinnai RX199 installed last month. Installation team was professional and kept things tidy.
Adam Kowalski –
Hot water is steady and quick. No issues so far.