Rinnai RUR98iN 9.8 Max GPM Ultra Series Condensing Indoor Natural Gas Tankless Water Heater

Rinnai brand and its models provide innovative technology in their water heating system. They hold unique and helpful features that will definitely satisfy you by its service. You will get endless and unlimited supply of hot water instantly by this Rinnai RUR98iN 9.8 Max GPM Ultra Series Condensing Indoor Natural Gas Tankless Water Heater. The flow rate of this digital Rinnai RUR98iN Condensing Indoor Natural Gas Tankless Water Heater is 9.8 Gallons per Minute (GPM) at the temperature rises 70 degree or 50 degree Fahrenheit by ranging in between 4.2 (5.9) and 5.5 (7.7). With this flow rate the water pressure also changes by the command given and inserted in the system. It is very important to know the flow rate and the water pressure according to the country’s climatic condition and area. At the same time This is also an dual ventilation system gas tankless water heater unit for home use so this unit also able to provide best air treatment for your home. The situation varies with the water temperature inlet that will count the heating also. The cold, mild or hot climatic zones in the world have different temperature in the water. So according to their water temperature and pressure this multi functional water heater can easily adjust and will deliver the hot water by identifying the circumstances.

Rinnai RUR98iN Condensing Indoor Natural Gas Tankless Water Heater
Rinnai RUR98iN Condensing Indoor Natural Gas Tankless Water Heater
Some of its bullet features of this Rinnai RUR98iN Condensing Indoor Natural Gas Tankless Water Heater:
  • There is built in recirculation pump designed for quickest delivery of hot water on instant demand.
  • The thermal bypass technology is one of its extra ordinary inputs to carry on the systematic pumping and lining for effective flow of heated water directed on the shower or faucets lines to transform the cold water.
  • Integrated pump, internal bypass line and thermal bypass valve enhance the activity efficiently while the device starts the functioning.
  • This Japan made water heater is Wifi capable which you can handle by your smart phones or I-phones.
  • 0.96 Energy Factor (EF) is the utmost efficiency in its dual heat exchanging performance.
  • The installation is indoor for your sweet homes, offices or any other place of need to install this Rinnai RUR98iN.
  • Rinnai water heaters takes limited space for your convenience as it is the size of a suitcase.
  • Electronic ignition system removes the need for a pilot light for indication which is raise the ability to save your money for fuel costs.

The descriptions of the features:

Maximum output capability:

The heater can support 4 to 5 shower heads in slightly cold-temperate water pressure flow and 2 shower heads in very cold-temperate water pressure flow according to those inlet temperatures it adjusts nicely. The GPM maximum is 9.8 which sounds huge and excellent. At the same time, this unit is highly efficient to serve the best for 2000 to 2500 square feet house and capable to serve 3 to 4 bathrooms at a time. So undoubtedly you can call this unit is high-efficiency unit suitable for large homes. It is also capable to work at high altitude up to 10,200 feet.

Advanced display and remote control system:

Most of the water heaters in the market lack this features for displaying of the temperature analysis and its details instructed by the remote panel. You will find the digital display in the outer front part of the heater showing the temperatures, flow rate and water pressure ranging’s for residential or commercial purpose 98 degrees Fahrenheit to 140 degrees Fahrenheit.

Fixtures and fittings:

Its thermal bypass technology elevates the performance of recirculation pumping and temperature with the flow and water pressure. Integrated pumping for the water moving according to other section of internal bypass line and thermal bypass valve when the task of heating in its mode to deliver.

Up dated dual venting device:

You will get concentric polypropylene or dual pipe PVC or CPVC venting options in this model. This dual venting is absent in many other water heaters in the market. On the top, the dual venting is channeled for the user convenience. The pipe lining is one concentric vent with centro-therm twin pipe adapter or two PVC/CPVC in 3” and 4” configurations. The concentric polypropylene venting is attached for superb fittings, fast installation and reduced wall or roof penetrations. On the other hand, the PVC/CPVC is economical and popular for installation in the water heater. Resulting, this Rinnai RUR98iN model is a proper water heater unit to reduce the air pollution.

Secured water heater:

The water heater is highly safe from flaming, overheating, burnings and blast. The overheating is absorbed by the dual heat exchanger and channeled efficiently. Some other safety characteristics are automatic frost protection, thermal fuse protection, and combustion fan rpm check. By this protection system, this unit also a highly secured unit for home use and also suitable for use in commercial use.

The effective efficiency of condensing technology:

This best brands of tank less water heater like Rinnai’s unique condensing design incorporates with extraordinary two innovative heat exchangers to achieve the optimum heating level from every cubic foot of natural gas or propane gas. The manufacturer of this unit made this one with stainless steel system recaptures residual heat from the flue gases to preheat the incoming water, which circulates to the primary copper heat exchanger. That delivering an Energy Factor which is up to 0.96, so for its greater capability. This Rinnai’s tank less condensing units are ideal for residential and commercial applications also.

Others Gas tankless outdoor water heater you can buy:

There are some other epic gas tank less water heater and electric tankless water heater  ruling in the market that also you can choose to buy and use your home hot need or you can easily use these models to fulfill your commercial needs. These are like: Rheem RTG-84XLN, Eccotemp i12-NG Indoor, Takagi T-KJr2-OS-NG Outdoor, Camplux 5L Outdoor 1.32GPM Portable and so on. These are also the best category gas water heater and electric tankless water heater in our expert team eye. Because, these heater has the perfect features to serve you the best performance regarding to provide instant hot water.

Benefits of concentric polypropylene dual venting System


  • The item weight is 81.6 pounds with dimension 12.5 x 10 x 26 inches that is quite compact and can be handled anywhere to fix and use.
  • It takes only 120 volts which is energy and electrical efficient for use in any part of the world.
  • Rinnai RUR98iN water heater is certified by Energy Star.
  • Digital display of temperature.
  • Remote control for ease of access.
  • Warranty support for 12 year on heat exchanger, 5 year on parts and 1 year on labor for residential or commercial purpose.
  • Instantaneous delivery of hot water for the user.
  • Dual venting for less air pollution and environment friendly.
  • The customer ratings is high enough and that is 3.9 stars out of 5 stars.

Cons with solution:

  • The direct vent will not emit any type of harmful substance in the air as this water heater is eco-friendly. The venting is direct because of its functioning the water pressure and flow to measure the heating program and output level of delivery.
  • The installation can be done by yourself by reading the instruction manual or by finding the video on YouTube. The installation will be the little bit costly if you use to install it by a professional plumber.
  • This tankless water heater unit is not a lighter one its a bit heavy. As it has been featured with many advanced and newly developed technology for the user satisfaction and benefits.

Frequently asked questions:

Q: Is there is valve kit for this unit?

Answer: Yes valve kit is provided for the usage. You can also use it in other electronic devices also.

Q: Is this model is only for commercial use?

Answer: Of course not, the model is for multipurpose utilization in both homes or residential purpose and commercial purpose.

Q: How the venting activity happens?

Answer: It can serve more than 5 bathrooms and it is attached in one dual pipe (pipe within pipe) one for venting and other for fresh air.


As a result, this Japan made technology is very highly designed for effective use. The demand of this tankless natural gas water heater is on the rise. This Rinnai RUR98iN Condensing Indoor Natural Gas Tankless Water Heater gained popularity for its thermal bypass technology that generally sections the cold water into hot water for the user in case of delivery in output. The dual venting system has made this device as an ultra model called by manufacturers for less air pollution and eco-friendliness. The price of the Rinnai RUR98iN is affordable and low which will provide you high-quality service at low cost. That’s why our team of expert recommended this unit for your home use. Because this is completely an indoor gas tank less water heater that can serve you the best to fulfill you and your hot water demand.

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