Takagi Tankless Water Heater Review [All You Need To Know]

Takagi Tankless Water Heater Review

Is Takagi worth the investment? Find out from this Takagi tankless water heater review!

Are you in the market for a tankless water heater? If so, you’ve probably heard of the Takagi as it’s one of the most popular heaters available and has drawn attention for its convenience and energy efficiency. 

But is it worth the money? In this Takagi tankless water heater review, we’ll help you decide if it’s worth the investment. We’ll look at the features, performance, cost, and more to comprehensively understand this appliance. 

So if you’re wondering if it’s the right choice, read this Takagi tankless water heater review and find out!

Top 4 Takagi Tankless Water Heater


15 year limited heat exchanger.5  year limited parts residential use.Vented with category III stainless steel.



ENERGY STAR® qualifiedNSF certified for commercial applicationsIntegrated controls and power cord



ENERGY STAR® qualified15-year limited heat exchange5 yrs limited parts Residential us



15-year limited heat exchanger.5 yrs limited parts Residential use.Vented with Category III stainless steel




Takagi Tankless Water Heater Review

The Takagi tankless water heater is one of the most popular models available today. It’s an electric model designed to instantly provide hot water without needing a tank or extensive water storage system. 

As a result, it’s an excellent choice for those living in smaller spaces or who need to conserve space in their home. It’s also an ideal model for those who don’t need much hot water at once and don’t want to wait for the tank to fill. 


So if you’re looking for an efficient and convenient appliance to heat your water, the Takagi tankless water heater is a great option. As the Takagi tankless water heater can heat water instantly, it allows you to take showers or run any other water-using appliances without waiting for the water to heat up. 

Its digital touchscreen makes it easy to operate and monitor. It’s also a high-efficiency model and can save you a significant amount on your monthly utility bills.

Another benefit of Takagi tankless water heaters is that they don’t keep a constant supply of water hot. This implies that the unit only heats water as needed, which is a much more energy-efficient process. Although it’s best to check with your water company to ensure you can even use tankless water heaters in your area. 

Takagi Tankless Water Heater Review: Features

The Takagi Tankless Water Heater has several features that make it one of the best on the market and that includes:


1. Digital Controller 

The Takagi tankless water heater comes with a digital touchscreen controller that allows you to control and operate everything easily and efficiently, from the water temperature to the start time of the day. You can even set it on a timer so that it automatically turns off when you don’t need it.

2. Flow-Through Rheostat

This feature allows the water heater to adjust automatically to the needs of your household. Depending on the time of day and how many appliances are running, the water heater will increase or decrease its output accordingly. 

3. Micro-Processor

It is an energy-saving chip that helps regulate the water heater’s temperature. This helps reduce energy consumption and extend the tankless water heater’s life.

4. Continuous Flow Mode  

The continuous flow mode helps you get the hottest water possible. This mode is excellent for when you need a quick shower and don’t have time to wait for the water to heat up. You can also use this mode when washing your dishes since it provides a steady stream of water.

5. Energy Saving Switch 

This switch helps you save even more money on your energy bills by regulating the temperature of the water. You can also keep the water heater in energy mode and automatically turn it off once the water reaches the correct temperature. This helps you get the most out of the water heater and prevents it from overheating.

 6. Built-in Pressure Switch 

The built-in pressure switch helps detect leaks, so you don’t risk damaging your water heater. It also automatically shuts off the gas supply if it detects a leak to help prevent any damage to your home.

Takagi Tankless Water Heater Review: Performance and Efficiency

The Takagi tankless water heater is an energy-efficient model that can save you up to 70% on your monthly energy bills. It can produce up to 2.5 gallons per minute of hot water, which is excellent for households that don’t need a lot at once. 

It’s also an instantaneous model that can instantly provide hot water, making it great for everyday use. The Takagi tankless water heater is easy to install and ready to plug in and use.

Overall, the Takagi Tankless Water Heater is an efficient and effective appliance. It doesn’t use as much energy as a traditional water heater might, saving you a significant amount of money each month. 

It also has a temperature range of 45 to 140 degrees Fahrenheit, making it ideal for various household needs. This tankless water heater is easy to install and has a great warranty to ensure you’re taken care of for years.

Takagi Tankless Water Heater Review: Warranty 

Takagi offers a 15-year heat exchanger guarantee on all Takagi water heaters. Both copper-based and copper-stainless steel-based heat exchangers fall under this category, which is longer than the industry standard (just 12 years). 

Additionally, Takagi provides standard five-year parts and a one-year labor guarantee.

Takagi Tankless Water Heater Review: Cost and Availability

The Takagi Tankless Water Heater is more expensive than a traditional water heater. But it can save you significant money in the long run. This model will cost you around $1,000, making it one of the more expensive water heaters on the market. 


But this model also runs on electricity instead of gas, making it a bit cheaper than other models. Overall, the Takagi Tankless Water Heater is an excellent investment for your home. It’s designed to last for years without issues and eventually save money. You can purchase this water heater online or at various local stores.

This water heater is one of the most expensive models on the market. However, it is also one of the most energy-efficient and durable models. So while it may be an investment, you can expect it to last for many years.

Takagi Tankless Water Heater Review: Pros and Cons

For over 60 years, the Takagi brand has provided cutting-edge hot water solutions. In terms of quality and diversity, Takagi’s collection of tankless water heaters for homes and businesses is incomparable. However, Takagi has some benefits and drawbacks, much like other brands. So let’s look at them one by one.



There are many advantages of Takagi tankless water heaters and that includes: 

1. Convenience

One of the most significant benefits of tankless water heaters is convenience. These units provide a steady, endless hot water supply, so you never have to wait for it to be ready. This can be a huge advantage for busy families with many people who need access to water at the same time. 

With a tankless water heater, you can also avoid the annoying drop in pressure that can occur with a traditional tank water heater. This pressure drop occurs when the tank runs out of water and residents must wait for the water to be heated again. 

2. Efficiency

Takagi tankless water heaters are more energy efficient than traditional water heaters and can reduce your annual energy bills by as much as 50%. This can save you money and help the environment by reducing carbon emissions.

3. Compact Design

A Takagi tankless water heater has a small, compact design that is suitable for almost anywhere in your home. They take up very little space, which is ideal for smaller homes or if you are renting a house with limited space for appliances. 

4. Long Life

Takagi tankless water heaters have very long lifespans. They are typically durable and built to withstand the stresses of daily use. The majority of tankless water heaters last for at least 20 years.

5. Easy to Maintain

Tankless water heaters are simple to maintain and do not require much upkeep. This means less time spent on maintenance and more time enjoying the benefits of the tankless water heater.

6. No Hot Water Standby 

Unlike traditional water heaters, this tankless model doesn’t keep a constant supply of water hot. It only heats water as it’s needed. 


Although tankless water heaters provide many benefits, there are a few disadvantages to keep in mind, including:

1. May Require Electrical and Plumbing Upgrades

Depending on the size of the tankless water heater you choose, you may need to upgrade your electrical wiring or plumbing. Check the product manual to find out whether your electrical wiring and plumbing can support a tankless water heater.

2. May Not be a Good Choice for Areas with Low Water Pressure

Since a tankless water heater uses pressure sensors to detect when water flows through the system, it may not be the best choice for areas with low water pressure. A tankless water heater may take longer to provide hot water in these situations, or it may not provide hot water at all. 

3. Requires a Larger Upfront Investment

Because a tankless water heater does not store water like a traditional tank water heater, they are generally more expensive upfront. You might pay more for the initial investment. 

Now that you know the potential pros and cons of Takagi tankless water heaters, consider these factors before making a purchase.

Takagi Tankless Water Heater Review: Installation 

The Takagi tankless water heater is easy to install, even if you are not particularly handy. It comes with various fittings and accessories, including piping and a connection kit that make it easy for beginners to installing. 


You’ll just need to decide where to place it, install the pipes and any necessary fittings, and plug it in. If you face trouble installing it, you can call the manufacturer’s customer service line for assistance with installation. It measures around 16 inches in diameter, so keep that in mind when installing it.

Takagi Tankless Water Heater Review: Maintenance

The Takagi Tankless Water Heater also requires less maintenance than a traditional water heater. You can clean the unit every six months to ensure it’s running efficiently. And the digital touchscreen is easy to navigate, so you can make necessary changes whenever possible.

You can clean the outside as needed, and you may need to replace the anode from time to time, but aside from that, you shouldn’t have to do much.

Takagi Tankless Water Heater Review: Top 4 On The Market!

Let’s look at the top 5 Takagi tankless water heaters available on the market today.

1. T-K4-IN-NG

Depending on your requirements and the available space, the T-K4-IN-NG is a unique model that can install vertically or horizontally. With a GPM of 8, it is the perfect option for average-sized houses. It can even supply enough water for large homes, especially if you live in a hot climate.

The interior model has an advantageous energy efficiency of 0.80. Takagi also offers an exterior model, which protects against cold conditions but has an energy factor of 0.79.


Most Takagi models also come with remote control, one of which is the T-K4-IN-NG. With the help of this remote, you can adjust the heater’s temperature to a range between 99 and 167 degrees Fahrenheit. The temperature can be set using one of four device options, ranging from 113 to 140 degrees Fahrenheit.

The T-K4-IN-NG also has a self-investigative system, which can ward off numerous possible issues. If the unit gets too hot, a LED light will be visible on the control panel, and the system will disable itself to secure it.

2. Takagi T-H3-DV-N

If you’re looking for a tank type that will operate at a greater height than the typical 8,400 feet, the T-H3-DV-N from Takagi is an Energy Star water heater certified for use in elevations up to 10,100 feet.


Much higher than most models from other brands, the T-H3-DV-temperature N’s can regulate a maximum of 185 degrees Fahrenheit. The temperature can be adjusted using the console, which also displays error codes, or with a remote control.

Additionally, this model has a hi-limit switch, and an overheat cutoff fuse. The hi-limit switch ensures that the water temperature never rises above safe limits. At the same time, the overheat cutoff fuse will immediately turn the water heater off if it is retaining too much heat.

3. Takagi T-H3M-DV-N

The T-H3M-DV-N is another Energy Star model that offers all the advantages of the T-H3-DV-N while being suited for smaller homes. With 6.6 GPM, it is adequate for practically any average-sized home, even those in cold areas.


The primary heat exchanger of the T-H3M-DV-N, constructed of commercial-grade copper alloy, is one of its distinguishing characteristics. Compared to stainless steel, this provides a 25 times better heat transmission.

4. T-KJr2-IN-NG

One of the most popular water heaters available is the T-KJr2-IN-NG.This indoor water heater is ideal for homes of a standard size with a GPM of 6.6.

The unit is lightweight and small and can safely be mounted on a wall or fit in a small closet. Once you install the heater, you won’t need to frequently access it as you can turn it on and off with the digital remote control. The temperature can also adjust using the remote control, and it can be up to 150 degrees Fahrenheit.


The T-KJr2-IN-NG will consistently function exceptionally well as it is a self-modulating model. The heater will automatically detect the running water’s temperature to prevent temperature changes and water flow.

This is a good alternative even in locations with low winter temperatures owing to its interior freeze protection.

Takagi Tankless Water Heater Alternatives

If the Takagi tankless water heater isn’t right for you, here are some alternatives you may want to consider. 

1. American Standard Water Heaters

The American Standard Water Heaters are a popular alternative and are less expensive than the Takagi. 

American Standard Water Heaters provides premium natural and propane gas commercial and residential water heaters with BTU inputs ranging from 71,600 to 512,000 to effectively deliver large amounts of hot water for applications requiring hourly hot water recovery.

2. Rheem Water Heaters

The Rheem model is another alternative that is comparable to the Takagi. 

It also has an anti-corrosion design and a built-in pressure switch for added safety. It is also Energy Star certified and uses 80% less energy than standard water heaters. The Rheem model is slightly less expensive than the Takagi and has a smaller diameter, which may be more suitable for large households.

Conclusion: Takagi Tankless Water Heater Review

Takagi tankless water heaters are an excellent investment for upgrading their home’s water-heating system. They’re energy-efficient, long-lasting, and come in various models to suit any budget. Whether you’re looking for a basic model to save on utilities or a more advanced model to power multiple showers, Takagi has a tankless water heater.

FAQs on Takagi Tankless Water Heater Review

What to consider while choosing a tankless water heater? 

When choosing a tankless water heater, consider factors like your home’s water supply, energy source, and water usage.

What are the benefits of a tankless water heater? 

A tankless water heater offers various benefits, including endless hot water, energy efficiency, cost-effectiveness, and better temperature control. 

How long will a Takagi tankless water heater last?

A tankless water heater can last between 12 and 30 years with regular maintenance and water treatment.

Can a tankless water heater run continuously?

A tankless water heater uses less energy than a traditional water heater. It only heats water when needed, ensuring you always have enough hot water for your household needs.

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