Rinnai RUR98iN Ultra Review (Apr 2020) ~ Tankless Water Heaters

Product At A Glance

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

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Top Perk > High Efficiency

If you’re looking for a tankless water heater that uses less energy to deliver hot water when you need it, then you won’t a better choice than the Rinnai RUR98iN Ultra Series. This system has been described by many customers as the most energy efficient unit and we couldn’t agree less.

Besides being qualified by ENERGY STAR, this machine has an energy rating of 96% which obviously separates it in its own class. Just like other models from Rinnai, this unit gives you a range of choices for PVC and concentric venting. It all depends on what you want.

In addition to its high energy factor, this unit also produces lower emissions of CO2 and NOX through an advanced technology. Although highly priced, the value it provides quickly makes up for this.

  • 9.8/10
    Efficiency - 9.8/10
  • 8.8/10
    Ease of Use - 8.8/10
  • 9.6/10
    Value - 9.6/10
  • 9.8/10
    Features - 9.8/10

Rinnai RUR98iN

Cost: $$$$

Model Number: RUR98iN

Weight: 81.6 pounds

Size: 12.5 x 10 x 26 inches

Water Consumption: 9.8 gallons

Water Flow Rate: 9.8 gallon per minute (GPM)

Usage: Indoor

Fuel Type: Natural Gas

Similar model: RUC98iN

Warranty: Residential: Limited 12-year on heat exchanger, 5-year on parts, and 1-year on labor (5-year optional on labor). Commercial: Limited 5-year on heat exchanger, 5-year on parts, and 1-year on labor (2-year optional on labor).

Detailed Review


One of the best ways to cut down on your utility bill is to install a tankless water heater. Compared to a traditional hot water tank, a tankless water heater can help you save more than 30% of the money you spend on energy every month. How?

Energy is consumed all day by the hot water tank, whereas, a tankless heater only uses energy on demand. In order words, it’s only when you need hot water that power will be used. So if you stay throughout a whole day without using hot water, then you will not have to pay for hot water that day.

However, this is not the case with the traditional counterpart. Since power is being drawn to heat and sustain the hot water, you will have to pay for the used energy whether you are using the hot water or not.

But that’s only part of it.

With a hot water tank, you’re limited to the amount of water you can get depending on the tank’s capacity. Once the storage is emptied, you have to refill and heat up again; which may not always be convenient. However, with a tankless water heater, you have an unlimited access to hot water anytime you need it.

This explains why so many homeowners are switching over to tankless water heaters. And peradventure you’re still in the old age of traditional tanks, there’s no better time than now to take advantage of the power and efficiency of these heaters.

If you’re looking for the most powerful energy efficient tankless heater in the market that can easily meet your large family needs, then the Rinnai RUR98iN Ultra Series is your top shot. With a rated efficiency of efficiency up to 96% and an innovative recirculation technology that ensures an endless supply of hot water, this unit is definitely one you should never miss out on.

The Rinnai RUR98iN is equipped with a good number of advanced features that really separates it as a tankless water heater in its own class. Some of them include a built-on circulation pump for added efficiency, an internal by-pass pipe for internal recirculation, and a Wifi control that can be connected over your home’s network.

With the Wifi network, you can conveniently monitor and adjust your heating settings. Like we mentioned earlier, the use of an innovative re-circulation technology ensures that the machine is able to provide continuous supply of hot water