Best Rinnai RUC98iP Ultra Series Tankless Propane Water Heater Reviews 2021

Propane Tankless Water Heaters

Have you been looking for a water heater for your home? Was your old water heater not enough for your requirements? Well, you have come to the right place. The Rinnai RUC98iP Ultra Series Tankless Propane Water Heater, Twin/Concentric Pipe Installation is one of the best water heaters you can ever get. Now let’s get onto the details!

Best Rinnai RUC98iP Ultra Series Tankless Propane Water Heater Review:

Eco-friendly & Powerful Burner:

The Rinnai RUC98iP Propane Tankless Water Heater comes with the eco-friendly and most powerful burner making up to 199,000 Btus, but also, owing to the adjusting gas burner can decrease its power to low fifteen thousand and two hundred Btu.Rinnai RUC98iP Ultra Series Propane Tankless Water Heater Reviews

Temperature Controller:

The dip switch or temperature controller controls the water temperature, and can be set to the max of one hundred and forty F, in housing applications, while in commercial, up to one hundred and eighty-five F. The controller is fitted into the front panel while you can also install additional controllers for attaining higher temperatures, particularly in the commercial applications. Except for the temperature control and adjustments, it also permits users to see some other features, comprising the error codes for simple diagnostics during the malfunction.

Recirculation Capable:

All the RUC models come with the Rinnai Circ-Logic that uses an external pump, making the recirculation doable with the fast delivery of hot water.

Rinnai RUC98iP Concentric / Twin Pipe Installation Features:

  • The only company to provide both PVC and Concentric, offering more venting options right out of the box saving money, time, and the best flexibility to get the work completed fast.
  • It provides a continuous supply of hot water wherever and whenever it is required – at the same time to several fixtures.
  • The Rinnai RUC98iP is similar in size to a carry-on travel case; the space-saving design permits installation almost anyplace.
  • The energy factor is up to .96
  • Eco-friendly tech generates lower CO2 releases which contribute to a healthier environment and the cleaner air.
  • Max. BTU Input – 199,000
  • Min. BTU Input – 15,200
  • Warranty on the Commercial applications: five-year on parts, Limited five-year on the heat exchanger, and one-year on labor (two-year optional on labor)
  • Warranty on the Residential applications: Limited twelve-year on the heat exchanger, one-year on labor (five-year optional on labor) and five-year on parts.


  • Installation Type: Indoor Only
  • Product Type: Tankless water heater
  • 0.95 Energy Factor
  • Energy Star Rated
  • Temperature Range (F): 98-140
  • 199,000 BTU Input
  • Model: RUC98iP
  • Flow Range: 0.26-9.8
  • Product Dimensions: 10×18.5×26 inches
  • Approximate product Weight is 82 pounds
  • Voltage: 120 volts


The Rinnai RUC98iP 2021 can serve many faucets and bathrooms simultaneously. The high-flow rates of this product make it ideal for large houses. This product is Energy Star rated. If you have an aversion to gas, you can also convert this water heater to propane.

This water heater has two venting options: PVC or concentric. You can install it almost anywhere because of the space-saving, compact design. The advanced technology is used which guarantees extra low CO2 emissions. This water heater has temperature control buttons, a power button, and also a digital screen.


This product can be expensive for a few customers. If you want to install it in your house, then you might need to upgrade your home first. It is hard to install. It also requires regular maintenance from the expert Rinnai personnel.

Frequently Asked Questions Section:

Since the tankless water heaters still are not well-known in most households, individuals have different questions about them. That is not astonishing; when you contemplate making an investment and buying a costly tankless water heater, it’s just natural that you want to know everything possible. Here are a few FAQs that individuals who Best Rinnai RUC98iP Propane Tankless Water Heater Reviews were interested in.

Q: Does It Run On LPG?

A: Yes. You can place an order for natural gas or propane.

Q: Can This Product Be Utilized For A Radiant Floor Heating System Three Zones About 2440 sq ft House?

A: If you are gonna utilize it for the radiant heat, we suggest that the Rinaii with the circulating pump. This one will annul the warranty if you use a circulating pump.

Q: Does It Have The Capacity To Fill A Single Individual Whirpool Tub?

A: Yes, it supplies up to 9.8 gallons apiece minute of the hot water.

Q: Does It Come With The Isolator Valves?

A: Yes. It does come with the isolator valves.

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