Rinnai Tankless Water Heater

Rinnai tankless hot water heaters are built to commercial-grade standards and each individual unit is tested for quality. So you may never need our industry-leading warranty and legendary support for the most important appliance in your home.
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Best Rinnai Tankless Water Heater 2021

Every brand provides different kinds of speciality with its various products. As a result, the different models can cater to the diverse needs of the customers. Among these, Rinnai is the brand that offers the highest overall performance of any brand.

Rinnai is a Japanese manufacturing company which is a global leader that has almost 100 years of experience as a water heater manufacturer. They are also one of the leading companies in North America. They have had a long history of bringing comfort and satisfaction to its customers. Along with that. they backed by various professional service providers. Despite being generally more expensive, they offer great performance and quality operation. Therefore, Rinnai has gained a great reputation in its field.

Rinnai V65EP Tankless Water Heater, Large, V65eP-Propane/6.5 GPM

The Rinnai V65EP is a great Rinnai product and is mainly ideal for use in manufactured or used homes. This is actually a rarity among water tanks. Additionally, It offers a good 6.5 GPM flow rate which is perfect for an average-sized home with two bathrooms. It is meant for outdoor installation and can be used at altitudes as high as 10,200 feet.

Even though it offers good features, Its performance might turn out to be underwhelming. In comparison to other similar models, its performance is average. This is a non-condensing propane-fueled unit. It is also about 82% energy efficient; all that for a reasonable price as well. Therefore, it is a good option in general and the best option for those in a mobile home to use.

Rinnai RL Series HE+ Tankless Hot Water Heater | RL75eN - Natural Gas | Outdoor Installation

The Rinnai RL75eN is a remarkable model from the HE+ series line of Rinnai. It grabs your attention right off the bat. RL75eN is made to be put outside and works on propane. Moreover, it provides up to 7.5 GPM flow rate which is decent for any small household.

This model also features the brand’s iconic circ-logic technology which helps you conserve water. Due to this, you will save water.  You also wouldn’t have to worry since your energy bills will also be lowered. When maintained properly, the unit provides flawless and satisfactory service to the user. Along with that, the unit is also pretty durable. It is tough and is able to withstand almost all kinds of temperatures and conditions.


Rinnai V65iP Tankless Water Heater, Large, V65iP-Natural Gas/6.5 GPM

Since the advancements in technology and innovation have prompted different manufacturers to create a number of sophisticated tools, Rinnai has also stepped up to it. Rinnai V65iP indoor tankless water heater is perfectly reliable, cost-effective solution for medium-sized homes. The consumer can instantly notice a significant reduction in energy costs.

The V65iP features a completely compact body which helps in saving space. Moreover, it is light in weight and comes with a mounting option. As a result, it is easy to install.

The unit also gives a 6.5 GPM indoor tankless water heater can be suitable for any type of uses. The high efficiency made this type of indoor low NOx tankless natural gas water heater a perfect choice. This kind of a natural gas water heater is good to provide hot water instantaneously or ‘on-demand’.

Rinnai RL75iN HE+ Tankless Hot Water Heater | Indoor Installation

The Rinnai RL75iN tankless water heater is an indoor, non-condensing, energy-efficient unit. Coupled with a good 7.5 GPM that the unit offers, this is the perfect option for an electric tankless water heater solution that is suitable for both residential and commercial use. It is a powerful gas tankless water heater that can provide an endless supply of hot water.

This tankless water heater is a great product from Rinnai’s luxury line. Moreover, It is one of Rinnai’s top-selling models and holds a high reputation in giving solid results.

This also features their well-known Circ-Logic technology which recirculates water according to set patterns by the user. They are SCAQMD approved and allow up to 5 fixtures. It is an excellent unit for warmer climates and pretty sufficient for places with cooler groundwater. Along with this, they are also capable of Wi-Fi connection.

Rinnai RL Series HE+ Tankless Hot Water Heater | RL94eP - Propane | Outdoor Installation

The Rinnai RL94eP is the perfect option for any home. You can use it for a small apartment as well as a large home with many rooms. It is a gas-powered unit and has a great flow rate of about 9.4 GPM. It also conserves energy and water supply making sure that there is zero wastage. The unit can handle a wide range of temperatures, so it is a great option no matter where you live.

The only flaw about the unit is that some customers might not find it as budget-friendly as the other models. Despite that, the long durability of the heater and the various features it offers make it a relatively cost-effective option on the market. So, you can get a constant, unending flow of hot water at a reasonable price while saving over 40% of energy.

Buyer's Guide

Proper Installation

The company recommends that the tankless water heater installation should be performed by a licensed contractor who is trained to handle the plumbing, gas, electrical and venting aspects of a tankless water heater and is aware of all local and national gas fuel codes. Having a non-licensed professional perform the installation can cause operational and performance issues.

Location of Installation

The clean, modern and space-saving design of Rinnai Tankless Water Heaters gives you the flexibility to install on virtually any wall inside your home—not just in the utility room. And to save even more space, you can even mount a Rinnai Tankless Water Heater on the outside wall of your home.

Rate of Flow

The flow rate is one of the most important features when it comes to getting a water heater. It is practically measured in the GPM which is sent through the pipes. Since there are no tanks or reservoirs present with the Rinnai Tankless Water Heaters, the heating is done through the flow pipe. This rate of flow determines how much-heated water you will get in one minute.

So, the higher the flow rate that you have with your heater, the higher the quantity of hot water is what you can get. Generally, tank-type heaters come with a flow rate of 4 GPM to 8 GPM. But when it comes to the Rinnai Tankless Water Heaters, the flow rate is roughly around 6.5 GPM to 9.8 GPM. Therefore, you should select one considering your hot water requirements.


Depending on placement within the home, interior models of Rinnai Tankless Water Heaters can vent vertically through the roof or horizontally through an exterior wall. Rinnai offers multiple venting options for the super high-efficiency models that offer optimum safety and performance. Not to mention convenience and ease of installation for your installer.

Gas Line Sizes and Fuel Types

The power source of the tankless water heater is the next most important factor. The Rinnai product line of tankless models is available for natural gas or liquid propane fuel types, which offers increased efficiency and lower carbon emissions. The different models from the manufacturer mean that they will have different power inputs. So in terms of power source, the Rinnai Tankless Water Heaters offers mainly natural gas options.