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Spec Sheet Install Manual Learn More

RE199iN is the perfect combination of high efficiency, comfort and value in a natural gas non- condensing tankless water heater from Rinnai. Ideal for small to medium homes or remodels. Only the size of a small suitcase, is easy-to-install, reliable, and perfect for indoor locations; Rinnai products provide peace of mind with warranties that surpass the competition.

  • Uniform Energy Factor: 0.82
  • Warranty 15 yr Heat Exchanger / 5 yr Parts / 1 yr Labor
  • 10,400 BTU (minimum)
    199,000 BTU (maximum)
  • Indoor Only
  • RE Models DO NOT include isolation valves in the box (P/N: MIVK-T-LW).

Optimized Concentric Venting for Non-Condensing Models

Rinnai Tankless Water Heaters were the first to use a unique concentric venting system – featuring an inner pipe for exhaust and an outer pipe for fresh air from outdoors. The result is a direct-vent, sealed combustion system that requires only one penetration through the wall or roof.


Manufacturer Trade Model Number - U.S. RE199iN
Product Depth 10.77 in / (274 mm)
Product Height 27.28 in / (693 mm)
Product Width 14.05 in / (357 mm)
Product Weight 42.1 lb / (19.1 kg)
Gas Type Natural Gas
Installation Type Indoor Only
Uniform Energy Factor 0.82
Wi-Fi Capable Yes

Compact Design to Save Space

• Wi-Fi Technology for Remote Monitoring, Management and Recirculation Control.

• Improved Gas Conversion

Optional Accessories

Condensate Neutralizer, ScaleCutter, Additional Controllers, Pipe Cover, EZConnect™ Cables, control·r™ Wi-Fi Module, External Recirculation Pump, Wireless Accessories, and many more.

Controller Standard: Integrated

Controller Optional: MC-195T-US, RWM101 (control r™), MC601, MCC601 (RE199/RE180)


• Heat Exchanger: 15 years or 12,000 operation hours, whichever occurs first

• All Other Parts and Components: 5 Years

• Reasonable Labor: 1 Year

* It is recommended that a trained and qualified professional who has attended a Rinnai training class complete the installation. The warranty may be voided due to any improper installation.

— Installation and service must be performed by a licensed professional.

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Why Every Home Needs a Wireless Controller for their Tankless Water Heater

5 Powerful Benefits of Upgrading to a Rinnai Tankless Water Heater

Rinnai Tankless Water Heaters

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How Tankless Water Heaters Work

Installation Type:
Indoor Only

Fuel Type:
Natural Gas

Energy Factor:

Energy Star Rated:

Vent Type:

BTU (Min):

BTU (Max):

Temperature Range (F):
98°F to 140°F

Flow Range (GPM):
0.13 - 8.5


Hot Water Outlet (NPTF):

Gas Connection:

Cold Water Inlet (NPTM):



Product Height
27.28 in / (693 mm)
Product Width
14.05 in / (357 mm)
Product Depth
10.77 in / (274 mm)
Product Weight
42.1 lb / (19.1 kg)

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