Rinnai RL94iP Propane Tankless Water Heater Review

There are a lot of tankless propane water heaters out there on the market, so which one should you get? Well, with any water heater, it depends on how it works, and if your house and your needs are met by the heater. On that note, we’re going to delve into the Rinnai RL94iP review today, and see if this tankless propane water heater is worth spending money on! By the end of this article, you should have a clear idea on whether this heater fits your requirements.

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The Rinnai RL94iP has many important features that set it apart from the competition. Tankless propane water heaters are in general very efficient when it comes to energy maintenance. On top of that, they are able to supply your whole home with hot water, that too at an instantaneous rate. What about this Rinnai model then? The Rinnai RL94iP lives up to the expectation of providing instantaneous hot water throughout your home. This is thanks to the 9.4 gallon per minute water flow rate. It can simultaneously manage up to 4 showers, and ensure you’re guaranteed hot water.

As for the hot water you’ll be receiving, the Rinnai RL94iP’s hot water ranges in temperature from 36.5 to 60 degrees Celsius, making more than favorable for all your home activities. You’ll also find this model to be very ergonomic, with its digital aspect, allowing for you to make any adjustments and changes remotely.

Rinnai RL94iP Water Heater Features

Rinnai RL94iP Water Heater Features

Since you’ve been given a short breakdown of what to expect from this tankless propane water heater, let’s dive deeper and find out what sets it apart from the rest!

Energy Efficiency

Tankless water heaters are already meant to be energy efficient, and this Rinnai model delivers on that account as well. It has a whopping 82% energy efficiency, ensuring you not only save energy in your home, but also save on the bills in the future.

Heat Exchanger

The heat exchanger already allows for great efficiency, and it also allows for you to use this water heater in both commercial and residential purposes. It is also built with great durability, ensuring fewer problems and more longevity.

Preset Adjustments

You can set up your own configurations for the temperature and time with this water heater. This ensures you don’t waste extra power, and you’re not left with lower or higher water temperatures. Also, with the circ-logic recirculation technology, you’ll be allowed to easily set intervals at which the water is pumped through the heater. This technology makes your water heater much more desirable.

Digital Display

The digital display of the water heater will be set out on the front of the device. This not only makes it easy for you to operate the water heater, but also makes it easier to view the settings at all times. You can also operate it remotely, ensuring easy use. You’ll also be notified of any trouble your unit is having, thanks to this digital display.

Freeze Protection

This is a very important feature for all water heaters, and this unit has a freeze protection system that will keep it safe and running until -30 degrees Celsius! This ensures that the water heater will always perform properly no matter how cold it gets.

Excessive Deposits

With any water heater, you can expect a lot of deposits to be left from the constant entry of water in the system. To help you avoid this issue, the Rinnai RL94iP comes with the ability to keep the level of deposits in check, and thus ensures long term usage out of the unit.

Leak Detection

Leaks are one of the biggest problems with water heaters, and the Rinnai RL94iP comes with the ability to be able to detect it as soon as possible. Thus, this minimizes any damage to the water heater and its surroundings.

Pros and Cons of Rinnai RL94iP


Now that we’ve got the features out of the way, what are its actual benefits? How will it help you to have the Rinnai RL94iP? Let’s take a look at the pros for this model!

Whole House Application For Large Houses

Most large houses can not be sustained by many tankless water heaters, but the Rinnai RL94iP will not have this problem. This model comes with the benefit of a 9.4 GPM, ensuring the fact that you can facilitate hot water throughout your whole house. This has been key point in many customer reviews.

Steady Hot Water Flow

Customers have reviewed this water heater and said that it comes with a great flow of hot water at all times. This unit can pour out a continuous flow of hot water even if the incoming water into the unit is cold.

Easy to Install

Many water heaters nowadays are very complex due to the high tier technology they have. However, the Rinnai RL94iP does not need professionals to help install it, and with a proper readthrough of the manual, you will be able to handle it yourself! We do have to tell you that it is best if you have some knowledge when it comes to plumbing, before you actually attempt this.

User Friendly

With the digital interface, and the remote control ability of this water heater, you will find this to be a very friendly to use unit. Not only can you set up intervals for hot water production, but you can also set the exact temperature to what you want. You will also be able to tell if the heater is malfunctioning, as it will notify you.

Safety Features

The Rinnai RL94iP has very handy safety features, and this allows it to run for much longer at an optimal state over the years. Not to mention, this makes it a much more worthwhile investment. 


There really is only one con when it comes to Rinnai water heaters, and that is their delivery. When you get the product delivered, the packaging may be a bit below the mark. However, if your product does suffer any damage, you can definitely reach out to them for compensation on it.

Frequently Asked Question of Rinnai RL94iP Water Heater

Q. How do you bleed air from a Rinnai tankless water heater?

Place a cloth or rag on the drain valve of the water heater, and slowly turn it open and let the air hiss out of the unit. Let the air bleed out of the water heater and let the water keep running. Once it is done, return the water heater back to the way it was.

Q. How do you fix error 11 on a Rinnai tankless water heater?

Error 11 on a Rinnai tankless water heater is for no ignition. In this case, you need to make sure that the gas is turned on and that the igniter is operational. If these seem fine to you, but the problem persists, you will need to call a professional or Rinnai customer care.

Q. How long should a Rinnai tankless water heater last?

Rinnai tankless water heaters are meant to last for around 20 years. This lifespan depends on the water quality and maintenance of the water heater. However, they are a much more feasible option when compared to traditional units, making them more worthwhile.

The Takeaway

Rinnai are known for making good tankless water heaters, and we hope our Rinnai RL94iP review helped you in understanding if this model of theirs is for you! This unit definitely has its perks and if maintained properly, can help provide you hot water for many years. It will also be very handy to have, as the preset adjustments you can make allow for very little work. We think this is a worthwhile model, especially with its 9.4 GPM and 82% efficiency. We hope you find what you are looking for, have a great day!

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