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You can read up on water conservation and look for tips on reducing the amount that you use at home, or you can invest in a Takagi tankless hot water heater. The hot-water heaters made by this company come with built-in connections for easy installation, and some feature digital controls too.
One thing to keep in mind when shopping for one is that you need to choose between those designed for use with propane lines and those that will work with natural gas. Takagi also makes hot-water heaters meant for use inside and those that you can install outside.
The absolutely best tankless water heater that you can buy today is the Takagi T-H3-DV-N Condensing High Efficiency Natural Gas Indoor Tankless Water Heater, which can heat up to 10 gallons per minute. Though the flow rate and maximum heat will vary based on weather conditions and the ambient temperature, it can usually supply enough hot water for up to three or four bathrooms at the same time. As an indoor hot-water heater, they guarantees that it will meet emissions standards and that it’s safe for use in your home because it vents the gas outside.
Top 10 Best Takagi Tankless Water Heater Review
1. Takagi T-KJr2-IN-NG Indoor Tankless Water Heater
Have plenty of hot water on hand for everything you need with this Takagi T-KJr2-IN-NG Indoor, which is one of the Junior models designed for indoor installation. You’ll love the compact shape of this model because that shape takes up less space and gives you more room to move, but you’ll also like that it weighs less than other models and doesn’t require a lot of fancy hardware to hang and mount. Designed for use with natural gas, the T-KJr does require that you use stainless-steel venting to safely vent that natural gas.
Inlet components on this model keep a constant eye on the water temperature and let the system know when it needs to increase or decrease the temp based on your preferences. Depending on how you use this model, you’ll find that it has an energy efficiency rating of between 0.81 and 0.83, but that rating is high enough to earn it an Energy Star seal. Once installed, the T-KJr2-IN-NG can almost instantly lower your energy bill.
As this is a smaller model, it will work better in homes or apartments with only one or two bathrooms rather than larger homes. Its 6.6 gallon per minute maximum flow rating lets you know that it can provide an almost endless stream of supply to help you shower, wash dishes and do other tasks before you need to wait for more.
2. Takagi T-H3-DV-N Natural Gas Indoor Tankless Water Heater
If you love everything about the number one model from this brand but have natural gas lines instead of a propane line in your home, this T-H3-DV-N Condensing High Efficiency Natural Gas Indoor will appeal to you because it comes with all the same features but will work with natural gas.
Shower heads usually have a maximum flow rating of around three gallons of H2O per minute or less, and as this heater can heat up to 10 gallons of H2Oper minute, you’ll have more than enough hot water for taking a long and hot shower. This higher rating also allows two or more people to use other showers or sinks in the house at the same time without running out.
Though you’ll likely love the almost endless supply of hot-water that this model offers, you’ll also love that it offers hot-water on demand and that it will give you access to hot-water as soon as you press the power button and turn the knob on your sink or tub. It uses a computerized system to give it the power required and gets rid of the pesky pilot lights used by traditional models. It also meets low emissions standards.
The T-H3 is a great model that will work in most homes, including those located in cooler regions as well as those in warmer areas. It operates so quickly that even if the groundwater outside is cold, it can still heat the supply for a maximum of three bathrooms.
When you use the T-H3 in a warmer climate, it will supply hot H2O to your kitchen and multiple bathrooms on demand.
3. Takagi T-K4-IN-NG Indoor Tankless Water Heater,
Takagi understands that using a tankless water heater outside can sometimes increase the amount of time you spend waiting for hot water because it takes some time for the water heater to come up to temperature, but that won’t be a problem with this T-K4-IN-NG Indoor because you install it inside your home in a space like a laundry room or basement.
It has a conversion feature that you can use to convert the heater to work with direct vents, which provide any excess natural gas with a safe exit spot that carries the gas away from your home. It has a 0.82 energy efficiency rating and carries the Energy Star seal of approval right on its front.
Though it might look a little basic when compared to other models, the T-K4 came out in 2010 and allowed the company to improve on the design and efficiency of its T-K3 model. It weighs only 38 pounds and can mount right on a wall, and its low weight will keep it from damaging your walls or falling off a wall. Designed for use in homes with up to three bathrooms, the T-K4 can cut your monthly bills by up to 40% or more.
Since it requires only 120 volts to run, you’ll find that you can easily install it without taking up a large portion of your circuit breaker or without blowing fuses in an older home. It lets you set the temperature down to a minimum in the 90s or up to a maximum temperature of around 160 degrees Fahrenheit. It also features a maximum 150 PSI and releases up to eight gallons of hot-water every minute.
4. Takagi T-H3S-DV-N Natural Gas Indoor Tankless Water Heater
The only real difference between this T-H3S-DV-N Condensing High Efficiency Natural Gas Indoor and the other model we ranked as the best is that it heats a smaller amount of H2O every minute, but depending on the size of your home, you may find that the eight gallons of hot H2O it can provide every 60 seconds is more than enough for your needs.
With its on demand design, you’ll never find yourself standing around and waiting either because the heater will provide instant access to hot water that you can use on the spot. As an ultra low emissions model, you’ll also love knowing that it will work with any vents and keep the natural gas used from possibly harming your family.
Installing this model is so easy that you might decide to do it on your own. It comes with metal connections at the top that hook up to the pipes to allow H2O to enter the heater and exit back and into your plumbing system. The company not only includes installation instructions inside the box, but the manufacturer also has a toll-free number that you can call with any questions you have.
With a 180,000 BTU rating, it provides the hot-water that you need for cleaning around your house and for personal care. They recommends using this model in both warmer and cooler climates because it can supply for two bathrooms in colder climates and three bathrooms in warmer climates. The ambient temperature in your home, the air temperature outside and the groundwater temperature will all play a key role in how hot the water in your home will get.
5. Takagi T-K4-IN-LP Indoor Tankless Water Heater, Propane
One of the best models that this company makes for those who have propane systems is this T-K4-IN-LP Indoor, which has a 0.82 energy efficiency rating that makes it one of the most energy efficient unit that money can buy.
Energy Star even approved this model because it can help you cut down on your bills by more than 40% without sacrificing the supply that your family needs. With a BTU output that ranges between 11,000 and 190,000 an hour, it also has enough power to supply multiple rooms with hot-water at a temperature you will like.
Its maximum flow rating of eight gallons per minute ensures that you never find yourself dealing with cold water, even if you take a shower immediately after a family member or right after doing a few loads of dishes.
You do not need to use vent caps or any other pieces beyond what comes in the box, which makes installation a lot easier. This T-K4 also has a maximum PSI of 150 to help you enjoy a shower or bath without watching the pressure drop.
Suitable for use in homes with up to three full bathrooms, it can supply each bathroom as well as the kitchen without you noticing any drop in temperature, but it’s also a great option for those living in an apartment.
The T-K4 comes with inlets for both your propane line as well as the water line, and as you install it inside your home, the supply will slowly rise in temperature as the liquid moves to the heater. It also has its own built-in venting system for safe venting of that propane.
6. Takagi T-K4-OS-NG Outdoor Tankless Water Heater
We included this T-K4-OS-NG on our list of the top models because it is designed for use with natural gas and one of the few outdoor models designed by the manufacturer. Putting it outside is perfect for those who live in warmer regions because it will work so quickly with the already warm groundwater. With a maximum BTU output of 190,000 though, it will also work efficiently in regions that are a little cooler.
One feature that makes it perfect for use in colder climates is the built-in protection it has against freezing, which will keep the supply lines from freezing in the winter and also ensure that cold water never comes through your faucets.
It also has built-in components that constantly monitor the temperature to keep it from dropping below the temperature that you set. As you use this one outside, you do not need to hook up any vents to the heater.
You do not need a lot of fancy tools or extra equipment like vent caps to install the T-K4 outside your home, but you can purchase an optional kit for installing it inside. It features a water pressure that varies between 15 and 150 PSI and a maximum flow rate that will heat and send out up to eight gallons per minute.
7. Takagi T-KJr2-OS-NG Outdoor Tankless Water Heater
Another outdoor model from this company that will work in almost any region of the United States is the T-KJr2-OS-NG Outdoor, which is part of the Junior line of smaller models. With its compact shape and lower weight, you can install on any outdoor wall without worrying that it might damage that wall or that weather conditions outside will keep it from working correctly. It even has built-in protection to keep the water from freezing in the lines.
Though this is an outdoor model, it does a great job of using radiant heating and using the heat of your home to slowly increase the temperature of the water and to bring it up to a temperature that you will like before it reaches your bathroom or kitchen. Its 0.82 energy efficiency rating is one of the highest available from Energy Star.
This T-Jr2 model is good for the environment and good for your wallet because it doesn’t waste a lot of water and will help bring down your bills. It has both a higher BTU output and a maximum flow rate of 6.6 gallons per minute. That flow rate makes this better suited for homes with just one or two bathrooms because it cannot provide enough hot-water for more than two people to use at the same time.
8. Takagi T-KJr2-IN-LP Indoor Tankless Water Heater
The T-KJr2-IN-LP Indoor takes everything you love about the Junior line of water heaters and moves it inside to create a hot water heater that you can install in your laundry room or another room of your home.
As a liquid propane model, it will only work with a new or existing system that relies on this type of liquid for heating. Though it comes with connections on the top and bottom, it also requires the use of stainless-steel venting that you can purchase online or from a home improvement store.
Takagi makes the Junior line of products for those who do not want to sacrifice space, and you’ll find that these are the smallest model designed for residential applications on the market today. It uses radiant heat to bring the temperature up as soon as it enters the building. This is a solid choice for both home and apartment owners who use liquid propane.
With a maximum flow rate of 6.6 gallons per minute, it has a 0.82 energy efficiency rating, is a good choice for those who want to wash dishes while someone else takes a shower. You’ll also find that you can use the showers or tubs in two bathrooms at the same time without running out of supply. The company added internal components that monitor the temperature of the H2O too.
9. Takagi T-KJr2-OS-NG Outdoor Tankless Water Heater
Finding a model that you can install outside that will work as well indoor models is easy when you pick the T-T-KJr2-OS-LP Outdoor, which comes loaded with the same features as all the top indoor models. Internal freeze protection ensures that the supply never freezes in the line or inside the hot water heater on even the coldest of days. It also features a rugged metal case that will keep the internal components safe from snow, ice, and rain.
With a BTU output that ranges between 19,500 and 140,000, it can accommodate groundwater of a colder temperature and keep the H2O suppply from coming out of the tap at a freezing cold temp. As it has an energy efficiency or energy factor of 0.82, this water heater can also help you save on the cost of heating hot water for your home.
Many customers like the smaller design of this model, which will fit in almost any outdoor spot, and it even has a specially designed hanger at the top that lets you mount it on a wall with just seven screws or nails. That mounting hardware will prevent the heater from slipping down the wall or coming off during a storm. With a maximum 6.6 gallon per minute flow rate, this T-KJR is best for small apartments and homes that have no more than two bathrooms.
10. Takagi TH3JDVLP Tankless Water Heater, 6.6-Gallon per Minute
If you want a larger model that provides enough hot-water for multiple bathrooms and your kitchen, the T-H3-DV-P Condensing High Efficiency is the best option from this manufacturer.
Designed for installing indoors, it has a higher efficiency than other models, which lets you know that it will help you save on the money you spend each month for hot-water. It uses modern parts that eliminate the need for lighting a pilot light and keeping that pilot light on too.
With a standard mode that has its own tank, you need to worry about finding room for it in your home and about routine maintenance, but it requires much less in the way of maintenance.
The screen on the front is easy to view, even in the dark, and the buttons nearby make it easy to access the main menu, run a diagnostic scan of the heater or simply adjust the temperature based on your preferences or the preferences of someone else in your family. It also meets the standards required of all low emissions models.
One thing you may not realize about how the unit works is that these heaters heavily rely on the temperature of the groundwater outside and that when the groundwater is warmer, it will act faster and send supply through your pipes faster too.
When you use this in a cooler climate region like the Midwest, it can provide enough supply up to three bathrooms. If you use the heater in a warmer climate that has warmer groundwater temps, you’ll find that it can supply up to four bathrooms as well as a kitchen.
Which One is The Winner?
The Takagi T-KJr2-IN-NG Indoor Tankless Water Heater, Natural Gas really is the best choice from Takagi because it can cut down on H2O waste and saving water bills too. Designed to meet emissions standards, it can also heat water for up to four bathrooms.