Rinnai RU98EN Review

Rinnai RU98EN 9.8 GPM Outdoor Ultra-NOx Condensing Tankless Natural Gas Water Heater

A Non-condensing tankless water heaters are considered more efficient than the old type tank fitted, but the condensing models is the most efficient of all products, such as Rinnai RU98EN. This is one of the most powerful water heater from Rinnai categorized under the Ultra series, featuring energy factor of 0.95, 9.8 GPM, and a temperature controller is easy to use.

Main Features and Benefits

1. Condensing Water Heater - Rinnai RU98EN tankless water heater  is condensation, which is considered as the most efficient model in comparison with currently available products. In the combustion process, fuel is burned to produce hot gases. In this case, the hot gas is used to heat water. With non-condensing models, some of the hot gas just pushed through the vents to the outside, because it was useless.

Rinnai RU98EN condensing tankless water heaters, such as RU98EN, transfer of exhaust gas to heat the incoming water. In other words, energy optimization is much better.

2. Two Heat Exchangers - In order to operate as a condensing water heater, Rinnai RU98EN which uses two heat exchangers; one made ​​of steel, while others are made of copper. Steel heat exchanger is used to reclaim the heat generated by the combustion process. The copper is made ​​using a pre-heated water to provide optimal heating process on the gas stove. Cold water has been pre-heated before flowing through the main burner, allowing for optimal heating process. According to the manufacturer, RU98EN achieve good energy factor of 0.95 for natural gas or propane.

3. Temperature Adjustment - The Rinnai RU98EN including temperature controller to allow you to manually adjust the temperature as intended. The default settings only allow the temperature to go from 98 degrees F to 120 degrees F, but when the controller including installed, the maximum temperature reaches up to 140 degrees F. Rinnai also provide the kind of compatible controllers that can be useful for commercial applications where higher temperatures required . The controller included can also display diagnostic codes. Troubleshooting methods that may be listed in the instruction manual.


Customer Reviews

Based on customer reviews, the Rinnai RU98EN basically does its job very well. One of the customers claimed that this tankless water heater is able to perform a good job supplying hot water simultaneously for three bathroom faucets, two showers, and one kitchen faucet. The ultra series from Rinnai is indeed designed for medium to large homes. Another good thing is that the manufacturer offers 12-year limited warranty for heat exchanger, 5-year limited warranty for parts, and 1-year warranty labor for residential installations. The RU98EN only requires a minimum water flow of 0.4 GPM or 1.5 L/minute to start.

The only noticeable drawback is that this tankless water heater can be very difficult to install without the help from professional. It is completely different from installing a tank-equipped water heater. You need to use the correct gas pipe with the correct length, diameter, etc. Moreover, improper installation will void the great warranty offers from the manufacturer. Of course, hiring a professional will cost more money also.

Where to Buy

You can purchase the Rinnai RU98EN from various online stores, but Amazon currently makes this appliance available for only $1,347.94. This price is greatly less expensive compared to the actual list price that reached $2,053.00, meaning you can save 30% if you purchase it from Amazon. There are also some interesting buying options such as free shipping, super saver shipping, twelve-month financing, and more.


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