Top 7 Takagi Tankless Water Heaters Reviews

Top 7 Takagi Tankless Water Heaters Reviews

Living through the winters requires a high supply of hot water. The presence of hot water in cold climates makes it easy for one to performed common duties such as taking a bath, washing dishes and doing the laundry. The introduction of tankless water heaters has brought more relief during these trying times. They are more efficient than a standard tank water heater. This has seen homeowners and renters upgrade from their standard tanked water heaters and embrace this contemporary technology. Besides, tankless water heaters are now being integrated in various residential heating applications.

If you have been going through top rated tankless water heaters, then you are likely to have come across one of the seven Takagi tankless water heaters listed in this review. Takagi is a leading provider of tankless water heaters in japan. So, if you stick around you might learn something about these top-rated Japanese products.

Takagi T-H3-DV-N

Takagi T-H3-DV-N

  Pros   

  • No standby energy losses
  • Saves space
  • Provides endless hot water
  • Conserves energy
  • No pilot lights
  • Energy Star certified
  • Environment-friendly unit
  • Improves efficiency with a secondary heat exchanger
  • Saves 13-22% in gas and electric bills

  Cons  

  • Takes more time to supply hot water in two-story buildings
  • Warranty does not cover for freezing or repairs
  • Costly repair and maintenance
  • Requires professional installation
  • A bit noisy especially at night
  • Should be installed near a drainage system

Design Features 

The Takagi T-H3-DV-N On-demand water heater is an indoor model designed for use in households with three and four bathrooms, depending on the climate. Since it uses natural gas, it requires a ¾ inch gas line. Operating on optimum conditions, the unit can give out a water flow rate of 10 GPM.

The on-demand water heater requires a voltage of capacity of 120 volts to run the ignition and digital circuit.  The unit has a maximum heat capacity of 199,000 BTUs.  The temperatures can be set from 100 to 185 0F.

The Takagi T-H3-DV-N falls in the condensing category which is more efficient compared to non-condensing tankless water heaters. Since it is a condensing unit, it requires a ½ inch condensate tubing drain outlet and allows for PVC pipe venting. The heater is also built with computerized safety features and satisfies the 2012 SCAQMD’s Ultra-Low NOx Emissions standards.

User Critic

The company claims that the Takagi T-H3-DV-N tankless water heater is designed with an internal heater to prevent it from freezing, but this is not the case. The unit has a potential to freeze on certain temperatures. Shockingly, the warranty does not cover for freezing problems.

According to consumers, with firsthand experience, it is costly to install this unit with the help of an expert. Furthermore, it can take longer to get the water hot and it produces some noise with a rate of 55 dB.

Final Verdict

If you are looking for a tankless water heater that can supply 2 showers, washing machine, and dishwasher, all running at the same time with no fluctuation in temperature, then you need the Takagi T-H3-DV-N tankless water heater. This unit is suitable for households that have multiple uses of hot water at a time.

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Takagi T-KJr2U

Takagi T-KJr2U

  Pros   

  • Saves space
  • No standby energy losses
  • Provides continuous supply of hot water
  • Certified by Energy Star

  Cons  

  • Requires expert installation
  • Additional cost during installation
  • The product has been discontinued by the manufacturer

 Design Features

The Takagi T-KJr2U tankless water heater is designed for residential use. The non-condensing unit is available in both the indoor and outdoor model. The tankless water heater is supposed to get its power from natural gas, but electricity is required to power the circuit. In relation to power, the unit has an energy factor of 0.82. The Takagi T-KJr2U water heater supplies hot water at a maximum flow rate of 6.6 GPM.  It comes with a maximum and minimum heating capacity of 140000 BTU and 19500 BTU respectively. It requires a voltage capacity of 120v.

The unit was designed for Direct Vent which requires the use of Category III stainless steel. The heater can be used directly or indirectly with recirculation systems, heating systems, radiant floor systems, and storage tanks among other domestic hot water systems. Other external features that come with the unit is the power cord and a remote control. Besides coming with troubleshooting diagnostic codes, the unit has an integrated safety features such as surge, overheat and freeze protection.

According to the product description, it appears that the unit complies with Ultra-Low NOx regulations, this means that it is environmentally friendly when it is operated. It comes with a 15-year warranty on the heat exchanger and a 5-year warranty on parts.

User Critic

The unit requires expert installation which is an additional cost to the user. According to the manual, the unit should be installed when the climate is “temperate.”  The product appears to have been discontinued so there is not much to talk about. There is limited information on the conditions required to get an output water flow rate of 6.6 GPM. Judging from consumer reviews, the unit can output a water flow rate of 3.3 GPM if the inlet water temperature is 35°F and requires a temperature rise of 70°F.

Final Verdict

The Takagi T-KJr2U is recommendable for residential use. Therefore, if you are looking for a tankless water heater with a maximum flow rate of 6.6 GPM and has an Ultra-Low NOx emission.

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Takagi T-KJr2-IN-LP

Takagi T-KJr2-IN-LP

  Pros   

  • Saves space
  • No standby energy losses
  • Provides limitless hot water
  • Easy to install and setup
  • Energy usage on propane is lowered
  • Quiet in operation

  Cons  

  • Costly professional installation and maintenance
  • Additional expense (e.g. vent kit)
  • Strict warranty conditions

Design Features

The Takagi T-KJr2-IN-LP Tankless Water Heater is designed for indoor installation. It is powered by burning liquid propane giving it an energy factor that ranges from 0.81 to 0.83. The company claims that the product can deliver hot water at a maximum flow rate of 6.6 GPM.

The Tankless Water Heater require the use of 4-inch stainless steel pipes for venting purposes. The company recommends that a 3/4-inch gas pipe is to be used for liquid propane. The unit is designed with an LCD display which displays the water flow rate, and the input and output temperatures. It also comes with an exterior remote control which displays the water temperature and allows the user to set the desired output temperature.

The heat exchanger is expected to deliver a maximum heating capacity of 140,000 BTUs and a minimum of 19,500 BTUs.  The ignition requires an AC voltage capacity of 120 V. The unit can deliver a maximum temperature of 167 °F and a minimum of 99°F. The product uses inlet and outlet thermistors to monitor temperature to ensure that it is kept constant.

The Tankless water heater has a Low Nox emission. It is basically designed for Direct venting and strictly requires the use of category III stainless steel. The heat exchanger comes with a 10-year warranty, while the parts have a warranty or 5 years.

User Critic

A number of reviews suggest that the company hesitates to stand by their products when it comes to honoring the warranty. However, the manufacturer puts it clear that the unit has to be installed by a licensed technician otherwise the warranty is void. In addition, the warranty is void if the water used is not as specified in the manual.

The water flow rate of this unit will fluctuate depending on the condition of the water (temperature and hardness) and the temperature rise required. For instance, a well water with an input temperature of 60°F yields a water flow rate of 4 GPM when the water output temperature is set at 122°F.

Final Verdict

Takagi T-KJr2-IN-LP Tankless Water Heater should be perfect for light residential and radiant heating applications. Apart from the features it comes with, the unit can handle 2 showers and a dishwasher running at the same time at a constant temperature. Therefore, the unit is suitable for someone living in a small home with 2 bathrooms and requires 1 to 3 appliances running at the same time.

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Takagi T-M50

Takagi T-M50

  Pros   

  • Compact in design and Saves space
  • No standby energy losses
  • Provides continuous supply of hot water
  • Certified by ASME, NSF and Energy Star
  • No pilot light

  Cons  

  • Too expensive for residential use

Design Features

The Takagi T-M50 is a non-Condensing, heavy-duty tankless water heater. This is the most powerful unit among Takagi’s series of tankless water heaters. The unit is designed for high water demand and multiple uses. It features a Dual-Heat Exchanger system for high efficiency and reliability.

It draws its power from burning natural gas with a minimum and maximum heating capacity of 15,000 BTU and 380,000 BTU respectively. It is estimated to deliver 14.5-Gallon of hot water Per Minute. The temperature range is from 100 F to 185F. The circuiting is powered by a voltage capacity of 120 V

The unit has been certified for heavy-duty commercial applications by the American Society of Mechanical Engineers (ASME). It is a fully modulating water heater with Computerized safety features that include surge, freeze and overheat protection. Takagi T-M50 has a Low NOx, hence environmentally friendly when in use.

The Takagi T-M50 tankless water heater comes in two models:  The Indoor and outdoor installation units. These units can be used to supply hot water to domestic, hydronic, recirculation and radiant floor heating systems. The unit requires direct Venting with the use of Category III stainless steel pipes.

The heater uses Easy- Link and Multi-Link systems to maximize its on-demand hot water capacity. The Easy- Link is capable of supplying up to four units, while the Multi-link system requires a using a Multi-Unit Controller to help supply up to 10 units.

User Critic

The manufacturer claims that the unit can handle six showers running at the same time during warm climate and 4 showers in cooler climates. The unit is quite expensive and this may be the reason as to why it has no reviews.

Final Verdict

If you are looking for a durable tankless water heater which can supply a high demand for hot water, then you need the Takagi T-M50. This unit is suitable for commercial applications.

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Takagi T-KJr2-OS-NG

Takagi T-KJr2-OS-NG

  Pros   

  • Saves space
  • No standby energy losses
  • Provides endless hot water
  • Environmental- friendly
  • Certified by Energy Star
  • Easy to install
  • Compact and relatively lightweight

  Cons  

  • Wastes more water and takes time to heat up

Design Features

Takagi T-KJr2-OS-NG Tankless Water Heater is designed to be powered by Natural Gas. The nature of its design only allows for outdoor installation. Running at optimum conditions, the Takagi T-KJr2-OS-NG Water Heater delivers hot water at a flow rate of up to 6.6 GPM. It comes with a wired remote control which has two functions: to adjust the temperature and monitor the flow rate.

Being the smallest unit in the Takagi series of tankless water heaters, this product can produce a maximum heat capacity of 140,000 BTU/hr and a minimum of 19,500 BTU/hr. The calculated Energy factor of this unit was found to be 0.82. The unit comes with a default temperature setting of 120 0F, but it can be lowered to as low as 100 0F or increased to up to 140 0F. According to the installation manual, the product is to be installed in a temperate, moderate or mild climate. This means the unit won’t work if you install it in a cold climate.

Going through its warranty policy, the company has provided the user with a 12-year warranty on the heat exchanger, unit parts get 5 years and for labor 1 year. However, for you to qualify for the warranty, the Takagi T-KJr2-OS-NG Tankless Water Heater has to be installed by licensed personnel, otherwise, the warranty becomes void.

User Critic

The unit takes 30 to 60 seconds to get the water hot, which is a bit longer to some users.  This delay may be due to the long water travel since it is an outdoor model.

Judging by the customer reviews, Takagi T-KJr2-OS-NG Tankless Water Heater has one common shortcoming: When the input temperature is very low, the output flowrate is lower than the expected rating. Therefore, the higher the temperature rise the lower the flow rate.

Final Verdict

If you are looking for a tankless water heater for radiant heating and light residential heating applications then Takagi T-KJr2-OS-NG is the product you need. It is highly recommendable for someone who wishes to replace or install a new water heater for a small apartment unit with 3 hot water outlets, 2 bathrooms and a kitchen.

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Takagi T-KJr2-IN-NG

Takagi T-KJr2-IN-NG

  Pros   

  • Small, Compact and lightweight
  • Saves space
  • No standby energy losses
  • Provides continuous supply of hot water
  • Environmentally friendly
  • Certified by Energy Star
  • Easy to install
  • Reduced natural gas bill

  Cons  

  • Requires a professional technician
  • Costly additional parts and installation
  • Slight humming and rumbling noise during operation

Design Features

The Takagi T-KJr2-IN-NG tankless water heater has a design that only fits for indoor installation. Using electric Ignition, the unit burns Natural Gas to produce heat energy. With an Energy factor of 0.82, the product can produce s a maximum heat capacity of 140000 BTU. The unit qualifies for Direct venting with a 4-Inch category III stainless steel pipework.

For the tankless water heater to operate properly, the manufacturer recommends the use of double wall stainless steel exhaust vent pipes and a 3/4-inch gas line. The unit comes with a power vent which automatically adjusts the gas supply depending on the demand. It has an easy to install and use digital thermostat which is powered by a voltage capacity of 120V AC.

Running at optimum conditions, the Takagi T-KJr2-IN-NG tankless water heater can deliver hot water at a maximum flow rate of 6.6 GPM. It comes with a monitoring and controlling mechanism that uses inlet and outlet thermistors to maintain constant temperatures.

The Takagi T-KJr2-IN-NG tankless water heater comes with a separate warranty for a residential and commercial application. If used for residential application, the company can cover for the heat exchanger and parts for up to 10 and 5 years respectively. using the unit for commercial purpose gets a warranty of 5 years for the heat exchanger and 3 years for the parts.

User Critic

According to consumer reviews, the temperature of the inlet water can affect the flow rate. For instance, a water inlet temperature of 50 0F will run out of the hot water of 122 0F at a flow rate range of 3 to 3.6 GPM – nearly half of the expected 6.6 GPM flow rate.  This means, the higher the temperature rise the lower the flow rate you get.

In addition, the unit is affordable, but it gets costly as you purchase all the accessories needed and pay installation fees.  The Takagi T-KJr2-IN-NG tankless water heater is an inconvenience to homeowners who use 1/2-inch gas lines.  The unit requires a 3/4 gas line supply, so getting a new gas line is an added cost to the user.

The unit cannot handle two showers running at the same time in winter unless it is set at the lowest temperature or the temperature rise is small. The unit can take about 30 seconds for output water to reach the set output temperature. It is important to note that the warranty is void if you install the unit without the assistance of a licensed technician.

Final Verdict

The Takagi T-KJr2-IN-NG tankless water heater is perfect for light residential and radiant heating applications in small and medium-sized apartment units. If you are looking for a unit that can handle a bathroom, dishwasher and washing machine running at the same time, then you need Takagi T-KJr2-IN-NG model.

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Takagi T-K4-IN-NG

Takagi T-K4-IN-NG

  Pros   

  • Saves space
  • No standby energy losses
  • Provides limitless hot water
  • Save up to 45% on monthly gas bills.
  • Certified by Energy Star

  Cons  

  • Costly Additional parts (e.g. Stainless-steel exhaust vent pipe)
  • Wastes a lot of water waiting for the water to get got
  • Heat could drop when more than two water outlets are open
  • Operates with some noise
  • Requires professional installation which is also a costly affair

Design Features

Takagi T-K4-IN-NG Indoor Tankless Water Heater is an improvement to the T-K3 model. This unit was designed for indoor installation. It allows for direct venting with Stainless steel vent pipes. It is considered to be extremely efficient and environmentally friendly. When operating in optimum conditions, the unit can deliver hot water at a maximum flow rate of 8.0 GPM.

The Tankless water heater burns Natural gas using Electric Ignition to transfer heat to the heat exchanger unit. With an Energy factor of 0.82, the Takagi T-K4-IN-NG Water Heater can produce a heat capacity range of 11,000 to 190,000 BTU/hr. with an AC voltage requirement of 120 V.

Using the control system, you can adjust the temperatures from a range of 99 0F – 167 0F. The unit has a freeze protection mechanism which prevents the heater from freezing when the temperatures are low by drawing back combustion air into the heater.

Takagi has placed a 12-year, 5 years and 1-year warranty on heat exchanger, parts and labor for this model. However, the warranty may become void if you choose not to install the unit with the help of a licensed personnel.

User Critic

Judging by customer reviews, the unit can handle two showers running at the same time, but you will feel a drop of heat when a third application (dishwasher or washing machine) runs at the same time.

Final Verdict

The Takagi T-K4-IN-NG tankless water heater is highly recommendable for use in mid-size residential homes with 2 to 3 bathrooms. Perfect unit for domestic on demand hot water and radiant or hydronic heating application.

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Conclusion

The sizing of a tankless water heater depends on the output flow rate and the temperature rise. When looking for Tankless Water Heaters, make sure you get one that allows you to set the temperature and monitor the output water flow rate.

Tankless water heaters are very sensitives to scale buildup, so if you have hard water running in your house then you will need to install a water descaling unit. If you wish to extend the life of your unit, then you need to know the chemical composition of your water and do regular maintenance- descaling or flushing the unit once a year.

Searching for the best tankless water heater is not easy, but using the reviews above should help you decide which suits your needs.

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Takagi Tankless Water Heaters
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