Rinnai Tankless Water Heater Review – Top Recommendations!

If you desire to own the best Rinnai tankless water heater, then this Rinnai Tankless water heater review carries your solution. This piece clears the air on any Rinnai reputation and any biting question that you may need an answer to before making a purchase decision. 

Well, Rinnai tankless water heaters come in different models to serve the varying needs of many users. Some models use electricity, while others use other energy options like natural gas and propane. 

Furthermore, most designers are taking advantage of technology to equip the tanks with exceptional features to improve their functions. For instance, some models use Wi-Fi technology to allow one to operate it remotely. 

That said, we have six products for your selections. In the same vein, these products have excellent features to enhance usability. Let’s get started. 

6 Best Rinnai Tankless Heater 

Rinnai happens to be a top-performing brand in the market. However, there are several models to accomplish multiple needs. We reviewed different models with unique features to suit your preferences. 

Some models have a low flow rate, while others have a high one to support particular demands. Still, the same models come with different prices and efficiencies. Let us discover more.

1. Rinnai V65IP Tankless Water Heater

rinnai V65IP

Rinnai V65IP is a smart appliance featuring an app for easier management. The Control-R 20 app is excellent for convenient operations. Furthermore, it has a money-saving design which involves schedulers and timers to optimize system use. Not to mention, this system meets the standards of renowned standardization bodies. As such, Rinnai V65IP tankless will not compromise the air quality at home. Such a design lends this product to be human safe. 

Rinnai V65IP enjoys circ-logic technology to enable one to set recirculation patterns to suit your typical habits. For instance, you can program for hot water whenever you need it. By doing so, you will experience an endless hot water provision at home. 

As you purchase this Rinnai tank model, expect a competitive warranty. Precisely, you will get a 12-month warranty on the heat exchanger. Also, the other remaining parts will attract a 60-month warranty as proof of quality. 

Notably, one of its downsides is that it has a flow rate of 6.5 GPM. That happens to be the least, especially for particular products on our listing. However, its design can still power five fixtures in a row. 


  • Rinnai V65IP water heater is exceptionally quiet
  • The product is Wi-Fi compatible with smart functions
  • It used an efficient Control-R 2.0 app
  • It meets high-quality standards with certifications
  • The product has a decent warranty period


  • The flow rate output happens to below 

2. Rinnai RUC98iN Tankless Water Heater

Rinnai RUC98iN

One outstanding feature of this tankless water heater is the presence of an app. As a user, you only need an internet connection to control it. Meanwhile, you can still control the operations remotely. 

One can download this Control-R 2.0 app for better management. Beyond that, Control-R 2.0 app has useful features like timers and scheduling. By taking advantage of the convenient features in the app, you can save your energy bill.

Rinnai RUC98iN Tankless Water Heater has a space-saving design. Its installation is indoors where it uses natural gas as fuel. It has a decent flow rate of 7.5 GPM, which is sufficient to meet your average needs. 

It uses a PVC or concentric venting option. As such, it indicates a robust leak detection to prevent any eventuality. The design makes this tankless water heater remain safe for use without causing life-threatening risks. 

Finally, this tankless water heater comes with a decent warranty worth mentioning. There is a 12-month warranty for labor. The heat exchanger has a 120 months warranty.  As a buyer, you will get a 60-month warranty on other parts. You will get a two-decade service.


  1. It has a leak detection design. 
  2. The product can serve you extensively therefore reliable 
  3. It uses Control 2.0 app to improve its functions
  4. Extended warranty period
  5. Rinnai RUC98iN is Wi-Fi ready


  • Insufficient flow rate

3. Rinnai RL Tankless Hot Water Heater

Rinnai Outdoor Tankless Hot Water Heater

The designer tried to improve the efficiency of this model by using Cir-Logic technology. Such a design improves efficiency by more than 40%; therefore, it becomes reliable. 

One exciting element in the Rinnai RL Tankless Hot Water Heater is the size. The tankless water heater is compact. One can install this system in a confined place by maximizing the available space. A perfect example is the crawl space and attic. 

This unit has an output of 9.4 GPM as the flow rate. It may not be the highest, but it sits there in the middle, capable of handling the medium-sized family’s needs if hot water demand is not high. 

Interestingly, this system can serve you for more than 20 years hence reliable. That is double the lifespan; hence it equates to more savings. Do you know that most of the parts on this unit system are replaceable? Using Cir-logic technology allows the user to control the recirculation patterns. Such tanks are efficient to make hot water to be available at your discretion. 

One of its downsides is that it uses propane as the only fuel option. Propane happens to be more affordable than electricity. However, it is not available in many areas.


  • It is has a space-saving design due to its small size
  • Cir logic technology improves its efficiency
  • It enjoys 9.4 GPM as the flow rate
  • It is reliable for extended use
  • Excellent factory warranty to handle manufacturing flaws


  • Using propane only as a fuel type limits flexibility

4. Rinnai V75iN Hot Water Heater

Rinnai V75iN Tankless Hot Water Heater

Rinnai V75iN hot water tank comes with condensing technology. It will recycle the energy spent on heating the water. More importantly, such a design makes it have a high energy factor of about 0.96. This unit is flexible as one can power it using either natural gas or propane. Using multiple fuels puts it ahead of its competitors, which use only one type of fuel. You can opt to select a cheaper fuel and cut on your costs. 

Being small in size promotes a space-saving design. It can be a great choice in case you have less working space. Also, the ultra-low emission makes it safe while using it in your room. You can install the Control-R 2.0 app to make management more effortless. It has timers and schedules to enable you to control this system unit while operating remotely. One will never miss hot water in the entire home. 

However, one notable downside makes this unit. What is it? It is only ideal for indoor installation. Such an option does not make it inadequate since most of the tankless water heater happens to be for indoor use only. 


  • Condensing technology saves energy
  • Ultra-low emissions make it safe for use
  • Using the Control-R app to enhance its operations. 
  • The heater uses 199,000 max BTU


  • Rinnai V75iN Hot Water Heater is not Wi-Fi compatible

5. Rinnai V65IP Tankless Water Heater

rinnai V65IP

When a high flow rate attracts you, it is challenging to avoid a Rinnai V65Ip tankless water heater. Specifically, it has an output of 11 GPM hence suitable for handling small and medium-sized family demands. This product has a unique Circ-logic technology that controls the demands of hot water in your house. You can increase or decrease this flow rate since such systems are self-adjusting hence money-saving. 

This unit system is reliable as it has a lifespan of over 20 years. Most importantly, Rinnai V65IP has entirely replaceable components. In case such a system breaks, finding a replacement part is relatively easy. 

Besides, this unit system is excellent for indoor installation. It is noteworthy that it uses propane fuel only. Fortunately, it has a particular warranty period. The heat exchanger attracts a warranty of 120 months. Other parts enjoy a 60-month warranty. 

More importantly, Rinnai is reliable and well-designed. The only con about this tankless water heater is that you can only power it by propane, which is scarce in particular regions.


  • The tankless water heater is Wi-Fi ready
  • It has an efficient flow rate of 11GPM 
  • All the system parts are replaceable
  • It has a reliable Circ-logic technology
  • The unit has a decent lifespan of over 20 years


  • You can only use propane to power it. 

6. Rinnai C199EN Tankless Water Heater

rinnai C199EN

Rinnai C099EN is a versatile water heater that can meet various family hot water needs. It has a flow rate of 9.8 GPM, which is reliable for handling varying needs. With 96% efficiency, it makes it an all-weather water heater. By operating on natural gas or propane, Rinnai C199EN becomes an energy-efficient option. The heater is Wi-Fi capable; hence one can operate it remotely via a phone or a computer.

This top-quality tankless water heater attracts a warranty of 6 years on the heater exchange. Other parts will enjoy a warranty of 5 years. The labor takes a warranty of 2 years. Again, the design makes it attractive for premium pricing. 

The tankless water heater comes in a compact design. You can install it in any available space hence flexible. Still, Rinnai C199EN comes with additional venting options, which makes the installation more flexible. Finally, the tankless water heater has maintenance alerts to ensure the unit operates at maximum efficiency. When it remains in sound form, be sure to get an endless supply of hot water to meet the demands of your business. 


  • It has a compact design for maximum installation flexibility
  • It has maintenance alerts to hence efficiency
  • It can operate on both propane and natural gas
  • Rinnai C199EN with an extended warranty period
  • The system is Wi-Fi compliant for remote operations


  • It comes with premium pricing

Factors to consider when choosing Rinnai Tankless Water Heater

Rinnai tankless water heaters are becoming increasingly popular. Many find it hard to locate the right option that meets their needs. However, there is more hope for you if you implement the following parameters as you begin your selection process:


Users may prefer to switch to tankless water heaters since they are more efficient. One can save money on energy bills. Also, the tankless water heater remains affordable than other traditional storage tank heating units. 

One can rate the efficiency using the Energy Factor (EF). The more efficient unit has a higher EF. Remarkably, EF will indicate your hot water output and the amount of energy consumed. Notably, gas energy is not as expensive as electrical energy. 


Picking the right size of your tankless water heater remains paramount. Suppose it is too big for the household demand, then avoid it. Also, if it happens to be too small, then it will not meet your house requirements. 

Capacity is the most critical aspect when sizing the heater tank. Ensure that you pick the right system to keep up with your demands at peak usage. 


Warranty is an essential factor that you should never overlook. Warranties may differ from one model to the next. Also, different manufacturers offer varying warranty periods.

One of the indicators of the manufacturer’s confidence is the warranty. If a manufacturer offers a good warranty, it is a sign that the product is long-lasting. If your product is flawed, then as a buyer, you stand to lose the money. 

Fuel Type

You need an energy source to heat the heater. One of the most common options is propane, natural gas, and electricity. It is cheaper and easier to install an electric tankless water heater. However, electric tankless water heaters are not economical to use.

Also, it is expensive to install a tankless water heater. The cool thing is that natural gas is cheaper than electric power. 


Prices are also perfect indicators of the quality of the product. Suppose the tankless water heater has more features, then it will attract higher prices. On the other hand, if it has fewer features, then it will command low prices. Either way, you should operate within your comfortable budget. 


Question: What is the perfect fuel type for the Rinnai Tankless water heaters? 

Answer: Some models can use both propane and natural gas. Most importantly, they have an electrical ignition. The role of electricity is to provide a spark into operation. This electricity is not a source of heat to warm the water. 

Question: Can someone use a Rinnai tankless water heater in cold climates? 

Answer: Indeed yes. Rinnai tanks have a unique design for protection against freezing. As such, it can make the water flow even at -20 degrees Fahrenheit. The unit takes care of any possibility of frozen pipes. 


Rinnai tankless water heaters are modern devices to keep your water warm for different applications. As a homeowner, you need to understand your needs before selecting the most appropriate option for you. 

At last, you have your agony settled. The products in the above list contain exceptional features to meet different uses. Hesitate no more. Make a choice, and get fulfillment.

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