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C199i Commercial Tankless 199,000 BTU

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Fuel Type

Rinnai Commercial C199i


  • Increase savings with Commercial ENERGY STAR® certified tankless water heaters that operate more efficiently on-demand to provide an endless supply of hot water
  • Heat exchanger designed for the demands of businesses helps maximize the life of the product ensuring smooth business operations
  • Safety and security through built-in redundancy (multiple units and reliability to keep your business online)
  • Free up space with compact designs, that can be installed indoors or out for maximum location flexibility
  • Maintenance alerts keeping equipment operating at optimal efficiency and performance
  • Numerous venting options offer installation flexibility (room air option for the Tankless Rack System now available)
  • Wi-Fi Ready


  • 96% Thermal Efficiency, Commercial ENERGY STAR® certified
  • 199,000 BTU
  • Ultra Low NOx compliant
  • Approved for high altitude up to 10,200 ft (3,109 m)
  • Indoor and outdoor models
  • Integrated temperature controller that provides 98°F to 185°F, no external controller required
  • Commercial warranty*: Limited 6-year on the heat exchanger, 5-year on parts, up to 2 years on labor
  • Fuel conversion kits available
  • Isolation valves included


 Limited Warranty for Ultra Series C199i and C199e

What is covered?

The Rinnai Standard Limited Warranty covers any defects in materials or workmanship when the product is installed and operated according to Rinnai written installation instructions, subject to the terms within this Limited Warranty document. This Limited Warranty applies only to products that are installed correctly in the United States and Canada. Improper installation may void this Limited Warranty. In order for this warranty to apply, it is required that you use a licensed professional who has attended a Rinnai installation training class before installing this water heater. This Limited Warranty coverage as set out in the table below extends to the original purchaser and subsequent owners, but only while the product remains at the site of the original installation. This Limited Warranty only extends to the first / original installation of the product and terminates if the product is moved or reinstalled at a new location.

How long does warranty coverage last?


  1. Period of coverage is reduced to 3 years from date of purchase when used as a recirculating water heater within a hot water recirculation loop, where the water heater is in series with a recirculation system and all recirculating water flows through the water heater, and where an aquastat / thermostat, timer, or an on-demand recirculation system is not incorporated.
  2. The Rinnai Limited Warranty for a heat exchanger used in a recirculation system which is controlled through an aquastat / thermostat, or timer, or an on-demand system is 6 years for commercial applications.
  3. Labor coverage is extended to 2 years in commercial applications if the product is registered within 30 days (except registration is not required in California and Quebec) and/or if the other conditions above in the Commercial Applications sections are satisfied.

What will Rinnai do?

Rinnai will repair or replace the covered product or any part or component that is defective in materials or workmanship as set forth in the above table. Rinnai will pay reasonable labor charges associated with the repair or replacement of any such part or component during the term of the labor warranty period. All repair parts must be genuine Rinnai parts. All repairs or replacements must be performed by a licensed professional that is properly trained, state qualified or licensed to do the type of repair.

Replacement of the product may be authorized by Rinnai only at its sole discretion. Rinnai does not authorize any person or company to assume for it any obligation or liability in connection with the replacement of the product. If Rinnai determines that repair of a product is not possible, Rinnai may replace the product with a comparable product at Rinnai’s sole discretion. The warranty claim for product parts and labor may be denied if a component or product returned to Rinnai is found to be free of defects in material or workmanship; damaged by improper installation, use or operation; or damaged during return shipping.

How do I get service?

You must contact a licensed professional for the repair of a product under this Limited Warranty. For the name of a licensed professional please contact your place of purchase, visit the Rinnai website (, call Rinnai at 1-800-621-9419 or write to Rinnai at 103 International Drive, Peachtree City, Georgia 30269.

Proof of purchase is required to obtain warranty service. You may show proof of purchase with a dated sales receipt, or by registering within 30 days of purchasing the product. To register your tankless water heater, please visit For those without internet access, please call 1-866-RINNAI1 (746-6241). Receipt of Registration by Rinnai will constitute proof-of-purchase for this product. Registration of product installed in new home construction may be verified with a copy of the closing papers provided by the initial home buyer. However, Registration is not necessary in order to validate this Limited Warranty.

What is not covered?

This Limited Warranty does not cover any failures or operating difficulties due to the following:

  • accident, abuse, or misuse
  • alteration of the product or any component part
  • misapplication of this product
  • improper installation (such as but not limited to)
  • product being installed in a corrosive environment
  • condensate damage
  • improper venting
  • incorrect gas type
  • incorrect gas or water pressure
  • absence of a drain pan under the appliance
  • improper maintenance (such as but not limited to scale build-up, freeze damage, or vent blockage)
  • incorrect sizing
  • any other cause not due to defects in materials or workmanship
  • problems or damage due to fires, flooding, electrical surges, freezing or any acts of God.
  • any damage caused by poor water quality
  • operating the water heater with anything other than potable water at all times
  • force majeure

This Limited Warranty does not apply to any product whose serial number or manufacture date has been defaced.

This Limited Warranty does not cover any product used in an application that uses chemically treated water such as a pool or spa heater.

Limitation on Warranties

No one is authorized to make any other warranties on behalf of Rinnai America Corporation. Except as expressly provided herein, there are no other warranties, expressed or implied, including, but not limited to warranties of merchantability or fitness for a particular purpose, which extend beyond the description of the warranty herein.

Any implied warranties of merchantability and fitness arising under state law are limited in duration to the period of coverage provided by this Limited Warranty, unless the period provided by state law is less. Some states do not allow limitations on how long an implied Limited Warranty lasts, so the above limitation may not apply to you.

Rinnai shall not be liable for indirect, incidental, special, consequential or other similar damages that may arise, including lost profits, damage to person or property, loss of use, inconvenience, or liability arising from improper installation, service or use. Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation may not apply to you.

This Limited Warranty gives you specific legal rights, and you may also have other rights which vary from state to state.