Rinnai Tankless Water Heater

If you want hot water on demand 24 hours a day, seven days a week, your best option is to get a tankless water heater. One of the more popular manufacturers of these tankless water heaters is Rinnai. This is a Japanese company based in Nagoya, Japan. It manufactures gas appliances like energy-efficient tankless water heaters, home heating appliances, and boilers. Since we’re on the topic of tankless water heaters, the best one that Rinnai offers is the Rinnai RUC98iN Ultra Series. Keep reading this article to find out why this tankless gas water heater is the best that Rinnai has to offer.

Main Characteristics

The first thing you need to know about the Rinnai RUC98iN Ultra Series is that it is an indoor type gas tankless water heater. It is best suited for both residential and commercial applications. It can either use propane or natural gas and offers multiple venting options. This versatile tankless water heater is not only bigger and heavier than the most home tankless water heater brands, but it is also more powerful. It has an energy factor of 0.95 whether you use it with natural gas or propane. For those who don't have a clue what that means, that is a higher value than the average gas-powered water heaters and it means that it is very energy efficient. It is also an Energy Star-certified heater. It has a minimum-to-maximum gas burn rate that varies from 15,200 to 199,000 Btu. Aside from that, the heater has very wide hot water flow rate range is at 0.26 to 9.8 gpm. It has a minimum activation flow rate of only 0.4 gpm. These numbers mean that this tankless gas water heater can power multiple faucets and showerheads and can also be used in multi-bathroom households without worrying about interruption to hot water flow. The standard model is capable of heating water to temperatures of 95 to 140 degrees Fahrenheit, while the commercial model can provide water as hot as 185 degrees Fahrenheit.
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Pros and Cons

Pros:

  • Occupies less space than other water heaters even though it is quite bulky
  • Energy efficient
  • Above average hot water flow rate
  • Can simultaneously provide hot water to multiple faucets and showers
  • Very versatile
  • Very durable

Cons:

  • Requires professional help when installing
  • A bit bulky
  • Expensive

Design

Probably the main reason why the RUC98iN is the best Rinnai tankless water heater is because of its design. Its dimension of 26  x 10 inches allows you to easily find a place to install it. Plus, it only weighs 61.7 pounds. Although it is quite bulky, its compact and sleek design can offset the size. But make no mistake, it is not a lightweight water heater. This tankless water heater has a gunmetal gray exterior that provides the extra weight. Rinnai also placed the controls of this tankless water heater on the lower lip of the front panel for easier access. It has a power button, water temperature and gas control buttons, and a digital display, just what you would expect from any control panel. You can also lock the temperature button to prevent unauthorized access, which is an excellent child-proof feature.

Special Features

The most redeeming feature of the RUC98iN is its capability to power multiple faucets and showerheads. This will allow you to use multiple bathrooms or faucets in your house simultaneously without interruption to hot water flow. Plus, as you can see, it is using tankless technology. That means it only operates when hot water is needed. You will be able to save on energy and utility costs significantly. Lastly, this tankless gas water heater gives you options at the time of installation depending on your needs, which will provide you more efficiency in terms of gas consumption.

Warranty

For residential models, it has a Limited 12-year on the heat exchanger, 5-year warranty on parts and a 1-year warranty on labor (plus an optional 5-year warranty on labor). For commercial units, it has a limited 5-year warranty on the heat exchanger, 5-year warranty on parts, 1-year on labor (plus an optional 2-year warranty upgrade on labor).

Summary

The RUC98iN is the best that Rinnai has to offer because it is a sleek and highly efficient gas tankless water heater that can use either natural gas or propane. It also comes with multiple venting options. The downside is, it is a bit bulky and can be tricky to install. It is one of the most powerful tankless water heaters on the market today. Plus, it does not make any noise when heating the water. It is what you would expect of Rinnai in terms of service, maintenance and of course the quality.

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How Tankless Water Heaters Work

If you grew up in a home with lots of people taking showers and running appliances, you probably already know what it feels like when that big tank runs out of hot water. It’s not too fun, especially during the winter. This is where a tankless water heater comes very handy. Why, you ask? A tankless water heater system heats the water as you need it, instead of continually heating water that is stored in a tank. If you go to Japan or Europe, these tankless water heaters have been the norm for several years now, but they haven’t gained a lot of traction until recently in the U.S. This is largely because of the green movement. What you get from a tankless water heating system is that you can save a substantial amount of money every year on your monthly bills. At the same time, you can conserve natural gas. Plus, these tankless water heaters also last about five to 10 years longer than an ordinary tank heater. It also takes up considerably less space and will provide you with an unlimited amount of hot water. The only downside to this type of water heating system is that it can cost up to three times as much as an ordinary tank heater. It also often requires costly upgrades to your natural gas line and an expensive venting system. Consider it a long term invest that will pay dividends after a couple of years. But how do these water heating systems work? Read on to find out.

How Do They Work?

In order to get a good grip on how a tankless water heater works, you must first understand how a standard tank heater operates. A traditional heater system usually has a large tank that holds and heats water in order to give you hot water when you need it. The tank will continually heat the water to maintain a constant temperature. Energy is being used to keep the water hot even when it’s not being used. This is called standby heat loss. Tankless systems on the other hand, avoid standby loss by heating incoming water only when you need it. That’s why these systems are also referred to as “on demand” water heaters. Eliminating the standby heat loss is what makes a tankless water heater more efficient.

Here’s the breakdown of how this type of water heating system operates. As mentioned above, a tankless water heater will heat water directly without the use of a storage tank. When you turn on the hot water tap, cold water will travel through a pipe into the system. Then the system will use either a gas burner or an electric element to heat the water. Thus, the tankless water heater will deliver constant supply of hot water. You don’t have to wait long for a storage tank to fill up with enough hot water. The downside is, a tankless water heater’s output will limit the flow rate.

Normally, a tankless water heater will provide hot water at a rate of 2–5 gallons per minute (gpm). A Gas-fueled tankless water heater will produce higher flow rates compared to an electric-fueled type. But sometimes, even the largest gas-fueled model cannot supply enough hot water if there are multiple users using hot water tap simultaneously. This is especially true in large households. A good example is taking a shower and running the dishwasher at the same time. This can stretch a tankless water heater to its limit. In order to rectify this situation, you need to install two or more tankless water heaters that are connected in parallel. This will allow you to use hot water taps simultaneously. You can also install a separate tankless water heater for specific appliances like a washing machine or dishwater. These appliances normally use a lot of hot water in your home.

Summary

To recap, when the need for hot water arises by turning on a shower, washing machine, dishwasher or faucet, the cold water will flows into the tankless water heater from the inlet pipe at the bottom of the heater. Water is then preheated as it passes through the heat exchanger, capturing any extra heat before it escapes into the vent system. Water is then continuously heated as it passes through the heat exchanger and exits from the hot water outlet pipe. It will then travel through the pipes of the home to the water fixture where hot water is needed. You can adjust the tankless water heater as needed to ensure the temperature set point is maintained. When the hot water fixture is shut off, cold water will stop flowing into the tankless water heater. The tankless water heater is now turned off until the next time hot water is needed. That is the complete process.

Best Propane Tankless Water Heater

If you are stuck with the dilemma of selecting the best tankless water heater, going for a propane tankless water heater is a very viable option. Propane water heating options normally includes technology that is on the cutting edge side of energy efficiency. One such example is a propane tankless water heater. Choosing an energy-efficient propane water heating system over the standard electric water heater can help you significantly reduce your energy costs. According to the Department of Energy, they roughly estimate that 20 percent of a home’s energy costs are spent on heating water. So, as a homeowner select an efficient water heater is very critical and propane-fueled tankless water heaters are some of the most efficient water heating technologies available today. But which one is the best? According to our research and tests, one propane tankless water heater stands above all else. That is the Takagi T-KJr2-IN-LP Tankless Water Heater. Keep reading to find out why this is the king of the hill.

Main Characteristics

This unit demands a power input of up to 140000 BTUs per hour. It can provide hot water with temperatures above 150 degrees Fahrenheit. This tankless water heater can produce up to 6.6 gallons every minute. This is perfect for those living in the moderate climates. This propane tankless water heater can support various hot water applications at the same time. The downside is, for colder regions, the flow rate can drop to 3 -5 GPM. This unit also has an integrated remote controller, which allows you to set your preferred water temperature a lot easier. The remote controller comes with the package upon purchase. This model is Energy Star certified and has an Energy Factor of 0.81-0.83. It is capable of offering the same level of performance as a traditional water heater with a 40-gallon tank. Another additional feature in this model is that it can also support radiant floor heating applications. This is the reason why many call it an all-around water heater.
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Pros and Cons

Pros:

  • Excellent performance
  • Less maintenance required
  • Provides over 150 degrees Fahrenheit hot water in a moderate climate at 6.6 gallons per minute
  • Comes with a remote control system
  • Light in weight and occupies a small space
  • Easy to install
  • For the output it provides, it has an affordable price tag
  • Has convenient and adjustable settings for both water temperature and water flow
  • Includes thermistors that minimize the occurrence of water pressure fluctuations

Cons:

  • Only suitable for small to medium houses
  • Requires a ventilation system to release the harmful fumes
  • Warranty offered is not as good as some of their competitors
  • Can’t be converted to other systems

Design

The Takagi T-KJr2-IN-LP Tankless Water Heater’s compact nature is also one of its main selling point. It is designed to be lightweight by nature as it only weighs 38 pounds. Compared to most propane tankless water heaters, this unit is pretty small and light. The Takagi T-KJr2-IN-LP Tankless Water Heater measures 6.7 by 13.8 by 20.3 inches. This will allow you to enjoy propane power without compromising your space-saving goals. It is also designed to be a “point of use” unit. That means that you have to buy more than one, if you have a larger home with multiple bathrooms.

Special Features

What makes this unit great is that it demands minimal maintenance requirements. And as mentioned above, it can provide hot water with temperatures above 150 degrees Fahrenheit, which is perfect even in colder climates. Also, his unit can produce up to 6.6 gallons every minute. Lastly, the Takagi T-KJr2-IN-LP Tankless Water Heater includes inlet and outlet thermistors that will provide continual temperature and energy output monitoring. This makes it a more energy efficient tankless water heater.

Warranty

The manufacturer provides a 10-year warranty for the heat exchanger and a 5-year warranty for parts and accessories. It also has a limited labor coverage. The manufacturer will provide for reasonable labor charges associated with warranty repairs or replacements within one year from the date of purchase. Reasonable labor charges shall be determined in the sole discretion of the manufacturer and paid directly to the Service Representative or licensed plumbing professional. Warranty service must be performed by an authorized Service Representative.

Summary

The reason why it is considered the best propane tankless water heater is because it has highly favorable reviews and a decent warranty. This propane tankless water heater will make a solid investment for any small home, apartment, condo, or even an office. It is a cost-effective solution for reducing your home’s monthly energy consumption. So if you are looking for a long term solution to your heating issues, the Takagi T-KJr2-IN-LP Tankless Water Heater is your best bet.

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The Best Tankless Gas Water Heater

If you want access to hot water heater at home whenever you want, the best choice is to get a water heater. This will eliminate the need to keep boiling water in a kettle or some other device. All you need is a water heater and you will have instant access to hot water. To take it further, you should go for a tankless water heater because of several benefits that you can’t find from a water heater with a tank. And if you want a long term investment, we suggest you get a tankless gas water heater. Compared to its electric counterpart, gas-powered units have better cold-weather performance and average lower fuel costs over time. Plus, they’re also more reliable if we are talking long term wise. So if you are getting a tankless gas water heater, it is highly recommended that you get the Takagi T-KJr2-IN-NG Indoor Tankless Water Heater. This is the best tankless gas water heater on the market today. You’ll find out why if you keep reading this article.

Main Characteristics

The Takagi T-KJr2-IN-NG is a very reasonably priced and popular water heater. It is considered the best choice in the gas category for small to medium-size households with fairly low demand for hot water. It will be able to supply you with with 2-3 fixtures at once in a warm climate. That is a very doable amount and is normally what an average household in most of the countries need. It will also provide plenty of hot water for apartments and smaller homes in cold climates.
The tankless gas water heater is capable of performing functions that a 40-gallon tank type water heater can perform. Although this is considered the smallest in all of Takagi's line of tankless heaters, it has the best scores in the technology front. Plus, it has the capability to provide a regular supply of hot water for a family. When you use this unit, you will be guaranteed consistent water temperature through its thermistors. It als features an air-fuel ratio (AFR) sensor that will check the efficiency, thus reducing harmful emissions. It features water temperature safety controls and will turn itself off in the event of overheating. It also has additional safety features that include troubleshooting diagnostic codes, freeze protection and surge protection.
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Pros and Cons

Pros:

  • Very durable. Can provide a family with hot water for up to ten years
  • Easy to adjust its performance
  • Inexpensive
  • Excellent warranty terms
  • Provides excellent value for your money

Cons:

  • Cost of Installation is high. You have to hire a certified professional to install the unit in order validate the warranty
  • Direct vent parts are not easy to find
  • Can only supply limited hot water that is only enough for houses with two bathrooms

Design

This tankless water heater is designed to use natural gas with an input between 19500-140,000 BTU/h. It has a flow rate of 6.6 gallons of water per minute (GPM) at 350F. It is designed so that the temperature can rise to 70 degrees Fahrenheit at 3.3 GPM. This unit is also designed to support hydronic baseboard or radiant floor heating applications. This unit requires venting to the outdoors. The venting can be horizontal or vertical. It has approximately 0.5 GPM activation rate and will require a 110-volt electricity supply.

Special Features

What makes this tankless gas water heater unique is its ability to control the flow rate. The maximum flow rate for this unit is 6.6 gallon of water per minute, but it can be reduced depending on your specific needs. You can also adjust the temperature of the hot water from anywhere between 99 degrees Fahrenheit to 167 degrees Fahrenheit, depending on your preference. You can do this using the remote control that is provided, which makes it much more convenient to use.

Warranty

Takagi provides a very long warranty of 15 years on the heat exchanger and 5 years on other parts, in residential applications. The warranty starts from the date of purchase and as mentioned above, the unit must be installed professionally in order for the warranty to be validated.

Summary

The Takagi T-KJr2-IN-NG is the best tankless gas water heater because it can offer you the best value for your money. Even though it is small in size, it is a very powerful system for supplying constant hot water on demand in small homes. It is proven and tested, and is very reliable. That’s why it has received a lot of positive reviews from customers. It is definitely one of the best investments in terms of tankless gas water heaters.

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The Best Electric Tankless Water Heater

An electric tankless water heater is the most affordable option for homeowners looking to retrofit their system. Just like the gas-powered models, electric systems will allow you to save a lot of money on your energy bills, plus it will give you constant hot water on demand without the limitations of a tank. It doesn’t matter if you live alone in a studio apartment or in a bustling household with many bathrooms, there are specific electric tankless electric water heaters that will suit your needs. Now if you are looking for the best electric tankless water heater, we recommend you get the Ecosmart ECO 27. This is by far, the most popular electric tankless water heater, and for good reason. Keep reading to understand why it is considered the best electric tankless water heater today.

Main Characteristics

The Ecosmart ECO 27 is one of the most powerful electric tankless water heaters. It is self modulating and more technologically advanced than most of the electric tankless water heaters on the market today. It has the capacity to provide hot water to a large home and can even handle a large tub or a Jacuzzi. That's how powerful it is. It can heat water at 3 gallons per minute which makes it very ideal for places with water temperatures that are below 40 degrees Fahrenheit. This water heater can produce hot water on demand and in sufficient quantities. This is especially great if you and other family members need to use hot water at the same time. This electric tankless water heater has internal jumpers which limit the heat output to a temperature of 105 degrees Fahrenheit. For the uninitiated, that means that it will never heat your water higher than that. It also means that your children and the elderly who live in the house won't get accidentally burned by scalding hot water.
You will also be able to control the temperature of the hot water by using the digital temperature control in one degree increments. Furthermore, this water heater has a 99.8 percent energy efficiency rating, so you can cut energy costs by as much as 50 percent. The reason why it has a high energy efficiency is because of the self modulating flow sensor technology. This technology modulates the energy consumption which will help conserve energy while still meeting the desired heating needs of the user.
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Pros and Cons

Pros:

  • Very reliable in heating the water
  • Very easy to operate
  • Parts are covered by a lifetime warranty
  • Easy cleaning and maintenance

Cons:

  • There is a slight delay before the water that comes out gets hot
  • Requires a minimum of 200 amp total service with three 40 DP breakers to provide protection for 240 volts
  • It does not cover warranty on labor
  • A bit complicated to assemble

Design

This heater has a stylish and advanced design which looks very pleasing to the eyes. It is also designed to save space since it is not a bulky water heater. Due to its design, you can install it under cabinets, or in closets, so they are out of your way. Aside from it being space saving, this water heater is also designed to be safe and rupture proof, so you need not worry about flooding. Lastly, this electric tankless water heater has been configured to accommodate cold climates.

Special Features

What makes this water heater stand out from the rest is its Self-Modulating Technology. As mentioned above, this feature will allow the unit to use less energy to heat the water. This will in turn save you money on your monthly electric bill. In fact, the ECO 27 can cut your electric bill by as much as 30% if you switch from your traditional water heater. This is also the largest and most powerful model with self-modulating technology from Ecosmart’s line of tankless water heaters, so it is great for a large single family home.

Warranty

The ECO 27 has a limited lifetime warranty for residential use when registered properly and installed within 30 days of purchase by a licensed professional.

Summary

The EcoSmart ECO 27 is considered the best electric tankless water heater today. This is even more recommended if you live in colder climates. It generates enough power to heat water for your entire family and to provide an endless supply of hot water whenever you need it. It has state of the art technology for energy conservation and is safe and easy to clean and maintain. And it has a lifetime warranty too. What more can you ask for?

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The Best Tankless Hot Water Heater

Tankless water heaters have risen in terms of popularity over the years. The reason for this is because these devices deliver hot water nearly instantaneously. It has a considerably longer service life than the traditional tank style counterpart. You also get the its ability to fit into tight spaces which is a very good plus. Furthermore, it has a certain environmental appeal. That’s why these tankless systems are a smart choice for many home owners. So if you are looking for the best tankless hot water heater, we recommend you get the Rinnai RUC98iN Ultra Series Natural Gas water heater. You want to know why? Keep reading this article.

Main Characteristics

The hot water heater is an indoor gas tankless water heater that is suited for both residential and commercial applications. It uses propane or natural gas (depending on which type you choose) and has multiple venting options. Rinnai has equipped the RUC98iN with two venting options, the concentric-PVC and twin-pipe. You can choose any of the two options depending on which you find easy to install. If you live in a large house or have a big family, you can rest assured that this heater can easily supply searing hot water to multiple faucets and showers simultaneously, with no interruption at all. To make it clear, this heater can provide hot water at a flow rate as high as 9.8GPM. The flow rate stems from the natural gas intake which varies from 15,200 to 199,000BTU. Aside from that, the heater's hot water flow rate range is also very wide at 0.26 to 9.8 gpm. It has a minimum activation flow rate of only 0.4 gpm. These figures mean that this Rinnai tankless water heater can power multiple faucets and showerheads and still can be used in multi-bathroom households without interruption to hot water flow. Of course this will depend if you can afford to pump it its required gas. That makes this water heater very versatile because it will give you your desired water flow rate.
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Pros and Cons

Pros:

  • Even though it is bulky, it occupies less space than other water heaters
  • Highly energy efficient, with an energy rating of 0.95
  • Provides a huge hot water flow rate
  • Able to provide hot water to multiple faucets and showers simultaneously
  • Very durable
  • Versatile

Cons:

  • Expensive
  • Difficult to install and a bit bulky

Design

This tankless hot water heater is 26 inches tall, 10 inches thick and weighs 61.7 pounds. It is a bit large for a tankless water heater. Although it is compact and has a sleek design, it is not a lightweight water heater as you can see. It has a gunmetal gray exterior. The controls are located on the lower lip of the front panel. The controls include a power button, water temperature and gas control buttons, and a digital display. Aside from it being able to control the temperature of hot water coming out of the unit, you can also lock the temperature button to prevent unauthorized access.

Special Features

What makes this tankless hot water heater special is it has bigger inlets and outlets than most gas tankless water heaters. It is also bigger and heavier, but provides more powerful. Even though it is very powerful, it just has an energy factor of 0.95 (which is higher than the average for water heaters powered by gas, we admit), it is still an energy efficient water heater. As mentioned above, this tankless water heater can supply enough hot water to multiple showers and faucets in a house with several bathrooms and will not suffer from interruption to the flow of hot water. This is probably its main selling point. This feature is mainly attributed to the fact that this heater has a minimum to maximum gas burn rate varying from 15,200 to 199,000 BTU. This is considered to be a very wide range in terms of tankless gas water heaters.

Warranty

The Rinnai Standard Limited Warranty will cover any defects in materials or workmanship when the product is installed and operated according to Rinnai written installation instructions, subject to the terms within this Limited Warranty document. Check the document for the exact warranty details.

Summary

This why the Rinnai RUC98iN Ultra Series Natural Gas water heater is considered the best tankless hot water heater. With its capability to supply unlimited hot water, savings in the energy and water consumption, great space-saving design, and environmental benefits, it is just hard to say no to this device. So if you’ve got the budget, don’t hesitate to get this unit. It is an excellent investment.

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