Rinnai V94XIN Tankless Water Heater

Rinnai V94XIN Tankless Water Heater (Product Review)

  • If you’ve always wanted a quality Rinnai V94XIN tankless water heater in your space, this article reviews one of the best and most efficient Rinnai water heater products you can get on the market.

Rinnai is one of the best tankless water heater brands, and its five-year reputation has firmly established its products as unparalleled in the market. Recognized for innovation and reliability, the Rinnai water heater range exemplifies advanced hot water solutions. This comprehensive review delves into a Rinnai hot water heater’s exceptional qualities, cutting-edge features, exceptional performance, and lasting durability.

Whether for residential or commercial use, Rinnai’s commitment to excellence is evident in each unit, including its renowned commercial tankless water heaters. Join us as we navigate the critical aspects of Rinnai’s tankless water heater technology, shedding light on its industry-leading contributions and unwavering dedication to delivering uninterrupted, energy-efficient, and limitless hot water.

Rinnai V94XiN Tankless Hot Water Heater

The V94XiN Tankless Water Heater by Rinnai redefines convenience and efficiency in hot water delivery. With its cutting-edge technology and compact design, this model offers a seamless solution for on-demand hot water needs. 

Equipped with advanced features and boasting an impressive flow rate, the V94XiN ensures a constant supply of hot water for various applications. Its user-friendly controls and durable construction make it a reliable choice for residential and commercial settings.

In this review, we’ll delve into the standout features, specifications, energy efficiency, and overall performance of the Rinnai V94XiN Tankless Water Heater, highlighting why it is a prime example of its commitment to excellence.


General specifications

Brand: Rinnai
Power Source:Gas Powered
Capacity: 9.8 Gallons
Item Dimensions: (LxWxH)17.5 x 31 x 13 inches
Color: White


Modulating technology

The Rinnai V94XiN incorporates advanced modulating technology, intelligently adjusting the energy consumption based on the hot water demand. This innovative feature ensures the heater operates most efficiently, resulting in significant energy savings over time.

Impressive water flow rate

With a maximum flow rate of 9.8 GPM, the V94XiN provides a continuous and ample hot water supply, accommodating multiple simultaneous water usage points without compromising water temperature or pressure.

Compact design

Featuring a compact form factor, the V94XiN is designed to fit into tight spaces, making it an excellent choice for both residential and commercial installations. This space-saving design opens up flexibility in placement options, ensuring easy integration into various settings.

Safety features

Safety is a paramount concern, and the V94XiN addresses it with features like overheat protection, flame failure detection, and boiling protection. These mechanisms ensure that the unit shuts down or adjusts in case of potential hazards, prioritizing user safety.

CSA-certified and Energy Star

The Rinnai V94XiN holds CSA certification, attesting to its compliance with stringent safety and performance standards. Moreover, its ENERGY STAR® qualification reflects its exceptional energy efficiency, contributing to reduced energy bills and a smaller environmental footprint.

Rinnai tankless water heater maintenance

Regular flushing for scale buildup

Over time, mineral deposits and scale can accumulate inside the heat exchanger, affecting performance and efficiency. To prevent this, perform a descaling procedure annually or as the manufacturer recommends. Turn off the heater and isolate the water and power sources. Connect a circulation pump and descaling solution to the heater’s isolation valves. Circulate the solution through the unit, then flush it with clean water. This simple maintenance step can significantly extend the lifespan of your heater.

Read the entire article on how to flush a Rinnai tankless water heater here.

Clean air intake and exhaust vents

Blocked or clogged vents can hinder proper combustion and ventilation, leading to performance issues and even safety hazards. Regularly inspect the air intake and exhaust vents for debris, dirt, or obstructions. Ensure the venting system is clear to facilitate efficient airflow and proper combustion.

Check for water leaks

Periodically inspect all water connections and fittings for leaks. Additionally, examine the heater’s components for signs of corrosion, which can compromise the unit’s integrity. Address leaks or corrosion promptly to prevent water damage and maintain the heater’s reliability.

Test the pressure relief valve

The pressure relief valve is a critical safety feature that prevents excessive pressure buildup inside the unit. Annually, perform a simple test by lifting the valve’s lever to release a small amount of water. The valve functions correctly if water flows freely and stops when the lever is released. If not, replace the valve to ensure safe operation.

Check and clean the inlet water filter

The heater’s inlet water filter prevents debris from entering and causing blockages. Regularly inspect and clean the filter to ensure proper water flow and prevent damage to internal components. Turn off the water supply, remove the filter, and rinse it under clean water to remove accumulated debris.

Rinnai tankless water heater warranty and customer service


Rinnai typically offers a warranty for tankless water heaters, including the Rinnai V94XiN. The warranty duration and coverage can vary based on the model and geographic location. The warranty typically covers manufacturing defects and malfunctions during the specified period. It’s crucial to thoroughly review the warranty documentation to understand what is included and any conditions that must be met to maintain warranty validity. Registering the product upon purchase is often required to activate the warranty.

Customer service

Rinnai is known for its commitment to customer satisfaction. They provide various customer support channels, including phone, email, and online resources. In case of issues, inquiries, or technical assistance, customers can reach out to Rinnai’s customer service team for guidance. Rinnai’s representatives are knowledgeable about their products and can help troubleshoot problems, provide information on maintenance best practices, and guide customers through warranty-related processes. Rinnai’s emphasis on customer service contributes to its reputation as a reliable and customer-centric brand in the water heater industry.

Alternatively, you can check your Rinnai tankless water heater manual for detailed information on Rinnai’s customer service or anything related to their products.

If you have any questions or complaints, contact Rinnai’s customer support here.


Energy efficiency and savings

The Rinnai V94XiN’s modulating technology optimizes energy consumption by adjusting demand-based output. This translates to significant energy savings over time, reducing utility bills while providing a continuous hot water supply.

Constant hot water supply

With an impressive flow rate of 9.8 GPM, the V94XiN ensures a consistent and abundant supply of hot water, even in multi-user scenarios. Say goodbye to running out of hot water during peak usage times.

Space-saving design

The unit’s compact design makes it suitable for installation in smaller spaces, freeing up valuable room in your living or utility areas. This flexibility in placement enhances its adaptability to various home layouts.

Advanced safety features

Equipped with features like overheat protection, flame failure detection, and boiling protection, the V94XiN prioritizes user safety. These mechanisms ensure the unit operates safely and reduce potential risks.


Complex installation

Installing a tankless water heater can be more complex than installing a conventional one. Proper venting, gas supply, and water connections must be ensured for safe and efficient operation. While professional installation is recommended, it can incur additional costs.

High cost of ownership

As with most high-quality tankless water heaters, the upfront cost of the Rinnai V94XiN can be higher compared to traditional storage tank models. While the energy savings and long-term benefits can offset this cost, the initial investment might require a larger upfront budget.

Top 3 Other Models of Rinnai Tankless Water Heaters

Rinnai RU130iN Condensing Tankless Hot Water Heater

Brand: Rinnai
Capacity: 7 Gallons
Power Source: Gas Powered
Item Dimensions LxWxH: 22.05 x 14.76 x 33.86 inches
Color: Silver

The RU130iN is a Rinnai commercial tankless water heater that presents an efficient solution for on-demand hot water needs. Its condensing technology ensures optimal energy utilization by capturing and recycling heat from exhaust gases. Its capable flow rate meets hot water demands for various applications. The RU130iN’s compact design, user-friendly controls, and safety features make it ideal for residential and commercial settings. As part of Rinnai’s condensing lineup, the RU130iN offers a reliable alternative for those seeking a space-saving, energy-efficient, and continuous hot water supply solution.

Rinnai RU160iN Tankless Hot Water Heater

Brand: Rinnai
Capacity: 9 Gallons
Power Source: Gas Powered
Item Dimensions LxWxH: 22.05 x 14.76 x 33.86 inches
Color: Silver

The Rinnai RU160iN shares the condensing technology of its siblings, focusing on energy efficiency while providing a reliable flow rate for hot water needs. Its compact size suits space-conscious installations, while its user interface ensures easy temperature control. With Rinnai’s reputation for quality and innovation, the RU160iN offers an attractive alternative for those seeking a condensing tankless water heater that balances efficiency and performance.

Rinnai RU180iN Condensing Tankless Hot Water Heater

Brand: Rinnai
Capacity: 10 Gallons
Power Source: Gas Powered
Item Dimensions LxWxH: 22.05 x 14.76 x 33.86 inches
Color: Silver

The Rinnai RU180iN stands out with its condensing technology, which maximizes energy efficiency by capturing and utilizing heat from exhaust gases. With a strong flow rate, it delivers hot water for various tasks effortlessly. Its compact design, user-friendly controls, and advanced safety features make it a compelling option for homes and businesses. The condensing technology sets it apart, ensuring energy savings and consistent hot water availability.

Why You Should Choose Rinnai Tankless Hot Water Heater

Costs savings

Rinnai tankless water heaters excel in energy efficiency, a key reason for their popularity. Unlike traditional tank heaters that continuously heat and store water, Rinnai’s tankless models only heat water as needed. This “on-demand” approach significantly reduces standby energy loss, resulting in substantial cost savings over time. By only using energy when hot water is required, homeowners can enjoy lower utility bills without sacrificing comfort. This energy-efficient design aligns with eco-conscious lifestyles while providing a clear financial benefit.

Uninterrupted hot water supply

Rinnai tankless water heaters deliver a continuous hot water supply, addressing the frustrations of running out of hot water during peak usage. The units can provide hot water at a consistent flow rate, accommodating multiple faucets and appliances. This convenience mainly benefits larger households or properties with varying water needs. With Rinnai tankless heaters, long showers, laundry, and dishwashing can all happen concurrently without compromising water temperature or pressure.

Installation flexibility

Rinnai’s tankless water heaters boast a compact and sleek design, making them an ideal fit for homes with limited space. Unlike bulky storage tank models that take up substantial square footage, tankless units can be wall-mounted, freeing up valuable room. This design flexibility extends to installation options, allowing heaters to be placed closer to the point of use, minimizing heat loss through pipes, and ensuring hot water arrives faster.

Advanced technology

Rinnai integrates cutting-edge technology into its tankless heaters, enhancing user experience and control. Many models feature modulating burners that adjust heating output based on demand, ensuring energy efficiency without temperature fluctuations. Intuitive control panels enable users to customize water temperature settings, monitor performance, and troubleshoot quickly. With these features, homeowners can fine-tune their hot water experience to match their preferences while optimizing efficiency.


Rinnai’s commitment to quality craftsmanship and durable materials makes tankless water heaters renowned for their longevity. While traditional tank heaters may have a limited lifespan due to corrosion and wear, Rinnai units are built to last. With proper maintenance and care, these heaters can serve homes for many years, offering consistent hot water without the need for frequent replacements. This reliability ensures peace of mind for homeowners, reducing the hassle and expense of premature heater replacements.

Frequently Asked Questions

How to flush a Rinnai tankless water heater?

To flush a Rinnai tankless water heater, begin by turning off the power and gas supply, then close the isolation valves. Connect a pump and flushing solution to the cold isolation valve, running the solution through the unit for around 45 minutes. Afterward, rinse the system with clean water, repeating the process until the water runs clear. Ensure to use your Rinnai tankless water heater flush kit.

How to clean a Rinnai tankless water heater?

Cleaning a Rinnai tankless water heater involves turning off the power and gas, removing the front cover, and carefully brushing or vacuuming debris from the heat exchanger. You can then wipe down the exterior with a damp cloth before reattaching the front cover.

Where are Rinnai water heaters made?

Rinnai water heaters are manufactured globally, headquartered in Nagoya, Japan. They have production facilities in various countries to cater to the demands of different regions.

How much is the Rinnai tankless water heater warranty?

The warranty for Rinnai tankless water heaters varies depending on the specific model and location. Details about the warranty duration and coverage can be found in the provided warranty documentation. Reviewing the terms to understand what is covered and any necessary conditions for warranty activation is essential.


In summary, Rinnai V94XIN Tankless Water Heater offer a compelling blend of energy efficiency, uninterrupted hot water supply, space-saving design, advanced technology, and durability. These factors collectively position Rinnai as a reliable and smart choice for modern homes, delivering cost savings and enhanced comfort. With a commitment to innovation and quality, Rinnai’s tankless water heaters are a dependable investment for a more efficient and convenient hot water experience.