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

If you have to need always hot water instantly in Residential, you can choose easily Gas Tankless Water Heater. Rinnai RUR98iN 9.8 Max GPM Ultra Series Condensing Indoor Natural Gas Tankless Water Heater is one of the most popular, best quality & most selling product in the online market.

Rinnai Gas Tankless Water Heater uses thermal technology which involves an integrated recirculation pump. These water heaters are 100% capable of providing you with an unlimited supply of hot water even for entirely several tasks like as shower, doing the dishes & cloth washing. These water heaters daily activities are very efficient. Some Rinnai Gas Tankless water heaters can provide up to 9.8 gallons (moreover 37 liters) per 60 seconds at 35° rise in water temperature. It is sourced from natural gas energy. This water heater installation is much harder to install than a regular water heater.

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

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

Product Specification:

Model Number  RUR98iN 9.8 Max GPM Ultra Series
Brand Rinnai
Gas Type Natural Gas
Installation Type Indoor (Residential)
Product Dimensions 12.5 x 10 x 26 inches
Maximum Gallons per 60 Second 9.8
Height (Inches) 30
Width (Inches) 18.5
Depth (Inches) 10.1
Weight (lbs.) 72.8
Voltage 120 Volts
Temperature Range 98 to 140
Recirculation Capable YES Degree Fahrenheit
1/2″ Gas Line Compatible YES
Wi-Fi Compatibility YES
Remote Wireless Thermostat Not available
Warranty- Residential Heat Water (Month) 144
Warranty- Residential Labor (Month) 12
Warranty- Residential Parts (Month) 60
Carton Size 1


Service Tips:

  • Gas water heater needs to be check frequently and have daily routine scheduled for maintenance.
  • This is very important to maintain proper function and safety.
  • Air filters can become blocked by dust.
  • Hoses and connections always have to check.
  • Gas Regulator needed to be inspected for proper operation and replaced when necessary.


Gas Tankless Water Heater price: If you buy a cheap water heater, you will get competitive performance that simply won’t last as long. Average tankless water heater cost price is as below:

  • National Average $1029
  • Typical Range $730-$2131
  • Low End $315
  • High End $12000

Tankless water heater brands: The top brands best tankless gas water heater are Rinnai, Rheem, Bosch, Navien, Takagi tankless water heater, EcoSmart tankless water heater and few others.

Gas Tankless Water Heater Capacity: If you want to use two (02) showers at a time, you will need maximum 5 gallons of warm water per 60 second (1 minute) from the tankless gas water heater. If you were running a shower and the washing machine at the same time, you would need 4.5 gallons per 60 second from the water heater. However, a Rinnai Gas Tankless water heater capacity is 9.8 gallons in a minute to provide hot water.

Benefits of tankless water heater: You could save money and can keep safe your family.  These can reportedly save you up to 50% off your standard water heating costs. Save time with warm water when and where you need it. Any size at home, even for multiple uses.

Ask Questions (Q&A):

Ø What is the best gas tankless water heater for Home?

Rinnai RUR98iN 9.8 Max GPM Ultra Series Condensing Indoor Natural Gas Tankless Water Heater is only for indoor installation. It is sourced from natural gas energy, and its flow capacity is 9.5 gallons per minute (GPM).

Ø How much gas pressure requirements for tankless water heater?

tankless water heater with 1-inch pipe size for a 20 ft branch length requires pressure minimum BTU 15200 & maximum BTU 199,900.

Ø Is this made in Japan?

Yes. Rinnai tankless water heater is made in Japan.

Ø What is the Maximum temperature?

The Max temperature is an s 140 Degree Fahrenheit.

Some Honorable Customer feedback on Tankless Water Heater:


  • LT Jaramillo-

For the first time in years, my wife was able to take a hot bath! Previously, she could fill up half a tub and then the hot water would run out!

It states it can support up to 5 simultaneous showers, and a dishwasher, but we have only tested to two baths, and we have been delighted. It is definitely worth the cost!

Installed this last week. Very happy so far. I introduced dedicated return line and now get hot water at faucets in 6 seconds when it used to take 30 seconds. The unit is surprisingly quiet. Significantly quieter than the Navian installed in my in-law’s house.

  • By Phil-

I do not write reviews, but I have to for the Rinnai RUR98iN. I was an early adopter of tankless water heaters. I originally purchased a Bosch in 2005 it because we have five children in the house and the cost to run a 75-gallon electric water heater was insane. It finally gave out this year, so I replaced that with the Rinnai RUR98iN. My wife had always complained about the tankless water heater and some of the challenges that come with them (hot water sandwich, length of time to get water). I live in Wisconsin where the inlet temperature of the city water is 36 degrees (no joke, I checked). I live in a ranch home with the water heater at one side of the basement. It took nearly 3 minutes even to get hot water to the furthest bathroom. I do not think my high-efficiency clothes washer has ever used hot water (not for lack of selecting hot). There are some constitutional changes that we as consumers have to make when you install a tankless or so I thought! I purchased the RUR98iN with a dedicated circulation line, and all of those issues are gone. I now have hot water to any faucet in 3 seconds (timed it), The hot water does not shut off when the valve is an open half way. My water consumption has decreased by 50% because I do not have to wait for it to warm up. The RUR98 is the only tankless that I have been able to find with a built-in circulation pump. No more complaints from the family. Here are my tips! 1) Read the manual even when someone else is installing. Some installers do not know that there are internal switch settings on the device that need to be reviewed for your specific installation (vent tube length, altitude, etc…). 2) Ensure you install a 2.5-gallon expansion tank and back-flow valves when you install a dedicated circulation line. In my area, it is building code but it acts as a surge protector does for your computer and protects your equipment.

Water heater repair :

Water heaters are provided blameless service, but occasionally they do have problems.

Water Heater Problems Can be:

  • No hot water.
  • Water is leaking from the base of the heater.
  • Insufficient hot water.
  • Rust Color water

Safety Tips:

Turn off power to a water heater. Turning off the circuit breaker or fuse powering the heater and turn off the water supply.

Conclusion: This is not the cheapest natural gas tankless water heater out there, but we think it is less expensive than your money price. Rinnai RUR98iN 9.8 Max GPM Ultra Series Providing an endless supply of hot water, energy savings, space saving model and environmental benefits. All of together this is a handy water heater with a good value.

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