Tankless Water Heater in Laundry Room

A Comprehensive Guide To Buying The Best Tankless Water Heater

Tankless water heaters are convenient, they are easy to install and require less than minimal maintenance. However, it is important to select the best tankless water heater – one that is offers high durability and the necessary features. These types of heaters are also referred to as demand-type heaters or instantaneous water heaters. However, you have to understand that these water heaters do not store water like traditional, full-sized water heaters do.

They provide hot water only as per your requirement. On the other hand, if you just install a single tankless water heater and have just two bathrooms it is important to understand that no everyone will be able to use hot water at the same time because it doesn’t store water. However, because they are so budget-friendly you can get two heaters installed so that more people can use hot water as needed.

Hot Water Pouring From Plumbing Header

Moreover, another cutting-edge benefit of the best gas tankless heater is the fact that you don’t have to worry about paying for the standby energy created by traditional water heaters, which essentially waste a lot of money. As tankless water heaters do not store waters, they are switched on once open the hot water faucet.

As soon as the pipe for the hot release waters into the tankless heater, the heater automatically or rather, instantaneously switches on and begins to rapidly warm the cold water. As soon as you stop using the hot water, the tankless water heater shuts down.

Did you know the best gas tankless water heater consumes 30% to 50% less operational energy compared to traditional water heaters? This means you can save more than $100 every year – however, this also depends on the amount of water you use every year. Tankless water heaters are designed to operate on either propane or natural gas.

Another advantage of using these water heaters is the fact you don’t have to worry about storing an additional 30 to 40 gallons of water in the tank, which in turn wastes energy. Moreover, these water tankers provide a streamlined flow of water with an uninterrupted supply – which is perfect for when you want to fill your tub with hot water or use a whirlpool. Tankless heaters are also designed to be mounted on walls, you can also mount one outdoors.

Tankless Water Heater on The Wall

You don’t have to worry about paying additional money for energy losses because of the gas and flame being constantly switched on in a traditional water heater. Tankless heaters offer a peace of mind and they are easy to install. In light of this, mentioned below is a comprehensive guide on how they work, their advantages and the reasons you should opt for the best tankless water heater.

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How Does The Rheem Electric Water Heater Function

These heaters are manufactured with simple functionality. You can don’t need a storage tank to use a tankless heater. As soon as you open the hot water tap, the water will travel to the tankless heater via an additional pipe and right into the water heart. The water in the unit will then be heated via a propane or electric burner.

The best thing about these heaters is that they can offer a constant supple of hot water. Plus, you don’t need to wait for the storage to be filled with additional hot water. However, it is important to understand that the tankless water heaters lessen the water flow rate considerably, which is why only person can use hot water at any given moment.

Tankless Electric Water Heater

If you read rinnai tankless water heater reviews, you will understand that quality tankless heating units will provide an average family with a heated water output of 2 to 5 gallons per minute (or 7.5 to 12.2 liters) per minute. Tankless heaters with gas-fire technology will provide you with a significantly increased output compared to electric tankless heaters.

On the other hand, not even gas-fired tankless heaters are enough to provide a continuous and increase output of heated water for large household where there hot water is being used by 2 or more people. For instance, if your kid wants to take a shower and you want to use the dishwasher at the same time, the output will considerably be reduced; the tankless heater will reach its limit.

This is where you can opt for two tankless water heaters instead of one. You can have one installed indoors and the other outside. Or you can even have both your tankless heaters installed side by side, for an increased output of water incase two or more people need to use it.

Another efficient way of ensuring everybody is able to use hot water is having a separate tankless water heater installed for major appliances such as the dishwasher. However, this is recommended for larger households.

Man Adjusting Tankless Electric Water Heater

Different Applications of the Best Tankless Water Heater Include:

  • Can installed for bathroom remotely located or hot tubs
  • Can be installed for different appliances such as a washing machine or a dishwasher
  • Can be used as a booster for solar powered heating systems

Reasons Why You Should Buy Hot Water Heater

There are plenty of reasons why you should not hesitate to get the best tankless water heater for your household. In light of this, mentioned below are some of the more important ones:

Increased Comfort

Nothing can beat a continuous and uninterrupted supply of hot water. Tankless water heaters are perfect for families looking to save money on energy costs and to keep hot water usage efficient. You can schedule times for using hot water, ensuring nobody wastes water.

Mom And Son Playing in Bathroom

You Can Save A Lot Of Space

The best tankless water heater does not take an even a lot of space, especially if you compare it with the space taken by a traditional water heating system – which takes a lot of space! Plus, instead of having it fitted inconveniently, tankless heaters can be mounted indoors and outdoors on walls, which is an added bonus.

Tankless Heaters Are Eco-Friendly

Not to mention the fact that they can help save you hundreds of dollars every year in wasted energy costs. These heaters can help minimize your heating bills. For example, rheem water heaters can help you save energy costs up to 40% every year – and depending on the durability of the product, you can save a lot of money for more than a decade. It is an investment that pays off quite brilliantly.

Going Green And Saving Natural Resources

There is no question that water is beginning to become a scarce resource in many parts of the world. It is a natural resource that cannot be replaced with anything else. Tankless water heating systems can help save a lot of water – enhancing your water usage efficiency by more than 30% - which is far more than what a traditional water heating system can provide.

EcoSmart ECO 27 Electric Tankless Water Heater Temperature Illustration

Marey tankless water heater is designed to help save water contributing towards improving the environment.

Tankless Water Heaters Are Incredibly Durable

Quality water heaters are designed to last more than 15 years, which is a lot! Plus, many brands offer impressive warranty offers to give you that extra peace of mind.

A Source Of Clean Water


The best part about using a tankless water heating system is the fact that you will not have to worry about dirty or rustic water. This is a problem that many people using a traditional heating system complain about.

Safety

The best tankless water heater comes with advanced safety features. You don’t need to fret about being burned with scalding water.

Senior Man Examining Safety of Tankless Water Heater

Important Note

It is important to understand that tankless heating system can mitigate energy losses associated with traditional water heating systems that store water. Although there is no denying the fact the best gas tankless heater have a powerful water output compared to electric models, gas-fired heaters can waste a lot of energy if you the pilot light remain opens through and through.

A Consideration

The total expenditure of operating the pilot light of the best tankless water heater varies from one model to the next. This is why it is important to do some research pertaining to the model you are going for. Ask the manufacturer everything – you need to ascertain the total amount gas utilized by the pilot light for the tankless water heater you are interested in buying.

Yellow Road Sign Safety First

If you want to save energy and annual heating costs, it is recommended that you buy a standing pilot light. This way you can always switch of the pilot light whenever the heater is not being used.

Maintaining And Installing A Rheem Electric Water Heater

While it easy to install the best tankless water heater there still plenty of factors you need to consider before installing the appliance in order to optimize its efficiency and effectiveness. These factors include:

  • The type of fuel used to power the tankless heater
  • The weather condition in the region you live
  • The local building regulations and codes
  • Safety issues (this is important when it comes to using a gas-fired tankless water heater)

The maintenance of your water heater will also depend on these factors, which is why it is important to call in the professionals to install the heater. Experience plumbers have the tools and resources to adequately fit the heater as per the aforementioned factors.

Guidelines For Selecting And Installing Tankless Water Heater

Figure Out How Much Hot Water You Need To Use

In order to optimize the efficiency and effectiveness of your tankless water heater is to identify the total flow rate you require. For example, a small tankless heater is enough to provide a good flow of hot water to one bathroom, your kitchen and the dishwasher you use.

Man Increasing Temperature on Tankless Water Heater

You need to determine flow rate your dishwasher and bathroom requires in order to maintain the maximum output of hot water. In simpler terms, you need to identify how many people and at what times, need hot water. You will have to work with your plumber to select the appropriate size of the tankless water heater system.

Consider The Amount Of Hot Water For Dishwasher And Your Clothes Washer

You need to determine which one of your appliances heats water internally and the ones that don’t. For example, if you have a clothes washer that heats the water internally, then you will not need to use water heating for the appliance at all. Many people don’t realize these things and end up using hot water from the tankless heater – making its use redundant, which contributes to wastage of water. So, check for appliances that just need cold water.

Choosing The Right Location To Fit The Water Heater

Tankless heater quickly heat water using a high-powered flame. This is why they are known as on-demand water heaters. This also means that such water heaters need quite a lot of air for optimal combustion, which in turn means that they will vent a ton of exhaust compared to traditional heaters.

Tankless Water Heater in Garage

This is why you need to carefully select the area where you install the tankless heater. In light of this, mentioned below are two ways how this might affect your tankless heater:

  • Air Venting for Exhaust – If you go for direct venting, you will need to have your vent termination set about 3 feet away from the nearest window. If you decide to vent using your roof, the total length of the vent will have to be calculated the by the total dimensions of the water heater, this includes the total amount of elbows fitted or any turns installed.
  • Combustion Air - If you are having a gas-fired tankless water heated installed, bear in mind the device will need to be fitted near an area with the flow of oxygen is good (for optimal combustion). A gas-fired water heater (tankless or not) requires a source of oxygen for combustion.

Our Top 10 Recommendations

If you aren't sure which tankless water heater is worth the investment, keep reading, as we have chosen a few of the best tankless water heaters on the market.​

Rheem RTE 13 Electric Tankless Water Heater

The Rheem RTE 13 is perfect for making your hot water usage more efficient. It offers a continuous flow of hot water and boasts a compact, easy to install, wall-mountable design. It also comes with LED temperature control options and a standby mode.

Rheem RTE 13 Electric Tankless Water Heater

Other features include:

  • Temperature control unit with active standby mode
  • A traditional ½” connection for continuous water supply
  • Sturdy heat exchanger (brass and copper)
  • Ideal for single-applications
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EcoSmart ECO 27 Electric Tankless Water Heater

A bit on the expensive, however, the EcoSmart ECO 27 is a smart investment designed to help save up to 50% of your yearly heating costs.

EcoSmart ECO 27 Electric Tankless Water Heater on White Background

Other amazing features include:

  • Digital temperature controls
  • Digital hot water control
  • Designed with copper and stainless parts boasting effectiveness and efficiency
  • Compact and aesthetically pleasing design and is easy to mount
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EcoSmart ECO 11 Electric Tankless Water Heater

The EcoSmart 11 comes with a life warranty. The tankless water heater is designed to save you up to 60% in annual heating bills. With this beauty, you will never have to worry about running low on hot water again. This is truly the state-of-the-art in tankless water heaters.

EcoSmart ECO 11 Electric Tankless Water Heater on White Background

Other features include:

  • You can save a lot of space (up to 12 cubic meters)
  • 11kw at 220
  • Advanced technology with self-modulating innovation
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Rheem RTE 9 Electric, 3 GPM

The Rheem RTE 9 is a cutting-edge tankless water heater model that is designed for easy installation, it is easily mountable and you can fit the machine anywhere you want.

Rheem RTE 13 Electric Tankless Water Heater

Other prominent features include:

  • LED temperature control system
  • Standby mode
  • On-unite temperature settings
  • Modulating power
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Takagi T-KJr2-IN-NG Indoor Tankless Water Heater, Natural Gas

The Takagi T-KJr-IN-NG tankless heater system is the company’s most compact model. Some other cutting-edge features include:

Takagi T-KJr2-IN-NG Indoor Tankless Water Heater, Natural Gas
  • Comes with continuous temperature control and monitoring with inlet and outlet thermistors
  • 0.8 to 0.83 energy factor
  • 6.6 GPM for maximum flow of hot water
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Eccotemp L5 Portable Tankless Water Heater And Outdoor Shower

If you talk about the best tankless water heater available, the Eccotemp L5 Portable model is perhaps the best and most effective tankless heater available today. The tankless heater provides a source of constant hot water has become the best selling product until date.

Eccotemp L5 Portable Tankless Water Heater And Outdoor Shower

The Eccotemp is designed for a multitude of uses and you can install it on a campsite, anywhere around the house, cabins, etc. The portability factor of this water heater has made it the best choice in tankless water heaters in the US. Some other features include:

  • 0.3 liters of hot water per minute (minimum water output)
  • Powered through liquid propane fuel
  • Battery ignition
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Takagi T-H3-DV-N Condensing High Efficiency Natural Gas Indoor

Sure, it is pricey, but the Takagi T-H3-DV-N Condensing tankless water heater is designed for large-household use. The Takagi T-H3 can provide a continuous flow of hot water for a total of four bathrooms in the summer when the weather is warm and three bathrooms when the weather is a bit colder.

Takagi T-H3-DV-N Condensing High Efficiency Natural Gas Indoor on White Background

The tankless water heater has a total gas input of 199,000 BTU. Other features include:

  • On-Demand hot water flow
  • Saves a lot of space
  • Energy conservation
  • Built with digital, cutting-edge temperature control system
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Stiebel Eltron Tempra 24 Plus Electric Tankless Whole House

The Stiebel Eltron tankless water heater is designed with state-of-the-art technology. This is model is completely redesigned and repurposed model – surpassing its predecessor. The tankless heater has been update with cutting-edge electronics and a simple hot water flow design system and sensor. Installing the water heater is easy and you can mount the heater indoors as well.

Stiebel Eltron Tempra 24 Plus Electric Tankless Whole House on White Background

Some other features include:

  • Digital control for temperature settings
  • Guaranteed reliability
  • No need to arrange for venting
  • Designed to save up to 20% on annual heating expenses
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Eccotemp L10 Portable Outdoor Tankless Water Heater

The Eccotemp L10 Portable is the perfect solution when it comes to using it in different location such as at a cabin and any other place where it is difficult to arrange for hot water. The L10 is a portable model and very easy to install both indoors and outdoors. All you have to do is hang the tankless water heating system on a wall and you are all set.

Eccotemp L10 Portable Outdoor Tankless Water Heater on White Background

Some other features of the L10 include:

  • Propane powered
  • 2.6 GPM of water pressure
  • Heats water at 80 to 120°F
  • Measures 1/2”
  • 2 D Batteries required
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Stiebel Eltron Tempra 29 Plus Electric Tankless

A technologically advanced tankless water heating system, the Stiebel Eltron 29 tankless heater is an efficient and cutting-edge upgrade to the earlier model, the Eltron 24. It has an easy temperature control system and is built with heavy-duty water heating sensors and electronics. Plus, the product does not need to be vented in order to fit. You can mount in just about anywhere you want, inside or out.

Stiebel Eltron Tempra 24 Plus Electric Tankless Whole House on White Background

Some other features include:

  • Digital setting for temperature control
  • Guaranteed reliability
  • You don’t need any sort of venting
  • The portable and sleek product design makes it easy to fit anywhere
  • Can help save up to 20% of annual heating costs
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The Bottom Line

So there you go, an in-depth and comprehensive guide to selecting the best tankless water heater system with some of the best product recommendation you can find.

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