Indoor Tankless Water Heaters 2019 (Top 7+ Product Reviews)

The Best Indoor Tankless Water Heaters 2019 Available In The Market!

The majority of Tankless Water Heaters are designed for indoor installations. These systems have a longer service life and are convenient. There are a lot of different brands and types of indoor tankless water heaters available in the market. We have discussed a few of the best indoor Tankless Waters Heaters to make it easy for you to choose the most suitable one for you.

Top 7+ Best Indoor Tankless Water Heaters 2019:

IMAGEPRODUCTDimensionsWeight
Gas Tankless Water Heater
Rinnai Ultra Series RUC98iN Indoor Tankless Water Heater 2019
Rinnai Ultra Series RUC98iN Indoor10 x 18.5 x 26 inches82 poundsCHECK ON AMAZON
Gas Tankless Water Heater
Rinnai V65IN Indoor 6.6 GPM Low NOx Tankless Water Heater 2019
Rinnai V65IN Indoor 6.6 GPM Low NOx Indoor13.9 x 8.8 x 23.6 inches49.4 poundsCHECK ON AMAZON
Electric Tankless Water Heater
Stiebel Eltron Tempra Plus 24 kW Tankless Water Heater 2019
Stiebel Eltron Tempra Plus 24 kW Indoor21.7 x 20.1 x 9.6 inches16.1 poundsCHECK ON AMAZON
Gas Tankless Water Heater
Eccotemp FVI-12 Natural Gas Indoor Tankless Water Heater 2019
Eccotemp FVI-12-NG Indoor4 x 15 x 24 inches29 poundsCHECK ON AMAZON
Liquid Propane Tankless Water Heater
Takagi T-KJr2-IN-LP Indoor Tankless Water Heater 2019
Takagi T-KJr2-IN-LP Indoor 6.7 x 13.8 x 20.3 inches38 poundsCHECK ON AMAZON
Gas Tankless Water Heater
Takagi T-H3-DV-N High-Efficiency Condensing Indoor Natural Gas Tankless Water Heater 2019
Takagi T-H3-DV-N High-Efficiency Condensing Indoor 11.2 x 17.8 x 24.9 inches59 poundsCHECK ON AMAZON
Electric Tankless Water Heater
Top Atmor-27kW240V-Electric-Tankless-Water-Heater Reviews
Atmor 27kW/240V Indoor17.4 x 5.2 x 13.4 inches17 poundsCHECK ON AMAZON
Liquid Propane Tankless Water Heater
Best Eccotemp-i12-LP-Liquid-Propane-Indoor-Tankless-Water-Heater reviews
Eccotemp i12-LP Indoor Black13.7 x 25 x 5 inches28.9 poundsCHECK ON AMAZON

Best Indoor Tankless Water Heater Reviews 2019:

There are a lot of manufacturers and types of indoor tankless water heaters that you can really choose from, we have compiled a list of different best indoor water heaters for you to check out and select the one that best suits you:

1. Rinnai Ultra Series RUC98iN Tankless Water Heater:

Rinnai Ultra Series RUC98iN Indoor Tankless Water Heater 2019

Features Of  Rinnai Ultra Series RUC98iN Tankless Water Heater::

  • Compact:

In today’s world, each square meter matters a lot, and nobody wants to install some large water heater and waste so much space in the house. But don’t worry! This particular product has a compact and sleek design which really makes it possible to install this tankless water heater anywhere you want in your house.

  • Uses Less Energy:

This tankless water heater provides ninety-five percent of the energy efficiency and becomes the most energy-efficient one. It means that this tankless water heater uses all of its energy for heating up your water and just 5% waste. It also makes your energy bills to reduce as it does not use too much energy for heating your water.

  • High Volume Output:

In its class,Rinnai Ultra Series RUC98iN  Tankless water heater comes on the highest level by providing you 9.8 gallons per minute. This tankless water heater can supply hot water to 5 showers or other water outlets at the same time without any problem. If you have a large family, then this product is the best choice for your household.

  • On-Demand Hot Water:

It feels so good when you open nay of your water valve and you get sizzling hot water. Unlike the conventional storage tank ones that need to store and then reheat your water for numerous minutes when your water in the heater is depleted, an indoor tankless water heater such as the Rinnai RUC98IN offers hot water when you require it. This unit heats the water as it passes through your tankless water heater rather than storing water in some tank and then heating it for you, which can take a lot of time. If you want your heated water without you having to wait for some time, then this tankless water heater is the best option to go for.

  • Reduced Contamination Risk:

In a tank water heater, water sits for very long times in the tank which can cause bacterial contamination. But don’t worry! When you have this tankless water heater, then this risk is reduced significantly. With a tankless water heater like this unit, you can be assured of the water quality for human use.

  • Advanced Features:

Rinnai Ultra Series RUC98iN Tankless Water Heater has an intuitive temp control which lets you set the perfect hotness you want. Also, when this tankless water heater is working, it does not make any noise which makes it ideal for those who like their peace.

Pros

  • High energy efficient
  • Two venting options
  • Unlimited hot water
  • Working performance is quiet
  • Multiple showers and faucets use at the same time
  • Five years of warranty on its part

Cons

  • Have to be fitted by a professional
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2. Rinnai V65IN Indoor 6.6 GPM Low NOx Natural Gas Tankless Water Heater:

Rinnai V65IN Indoor 6.6 GPM Low NOx Tankless Water Heater 2019

Features of Rinnai V65IN Indoor 6.6 GPM  Gas Tankless Water Heater:

  • 6 Gallons Per Minute:

This tankless water heater provides 6.6 GPM of flow rate. If you live in some warmer area, then you can use two showers at the same time. It this tankless water heart provides nonstop hot water to the users.

  • Low NOx Design:

This tankless water heater also meets the Texas and California NOx emission standards. It features minimum 150, 000 BTU (British Thermal Units) and the max energy factor is 0.82. This indoor tankless water heater is also very energy efficient being a natural gas unit.

  • Special Venting:

One thing that you should really know about this indoor tankless water heart that it needs special venting. You need to place it somewhere near the outside wall for good venting. You will need aluminum vent pipe having PVC outer pipe for venting.

  • Simple To Install And Use:

This tankless water heater has all the necessary parts. Also, this device comes with a user manual which makes it easy to understand how to install and operate Rinnai V65IN Indoor 6.6 GPM  Gas Tankless Water Heater. For venting, you will need some pipes. If you don’t know how to install this tankless water heater, then it is a great choice to call in some professional to do the job for you.

Pros:

  • Quiet working performance
  • Compact and lightweight
  • Continuous hot water supply
  • One button switches on and off for vacation
  • Simple installation
  • Ten-year warranty for the heat exchanger

Cons:

  • Requires special venting
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3. Stiebel Eltron Tempra Plus 24 kW Tankless Water Heater:

Stiebel Eltron Tempra Plus 24 kW Tankless Water Heater 2019

Features of Stiebel Eltron Tempra Plus 24 kW Tankless Water Heater:

  • Stable Temp:

This tankless water heater features an advanced flow controlling system for rally controlling the water temp in diverse flow levels. If you occasionally need some hot water, then this one is perfect for you. It features a reliable cover and high-level electronic parts for promising its long service life.

  • Five GPM Water Flow:

Stiebel Eltron Tempra Plus 24 kW Tankless Water Heater supplies you five FPM water flow rate. This device can also raise the temp by fifty-four degrees Fahrenheit at three gallons per minute. This tankless water heater also features the advanced flow control modules for regulating the water pressure itself.

  • Energy Efficient:

The energy rating of this device can also reach as high as ninety-nine percent as boasted by the company. It also has a full power modulation that allows large power of the product. And for saving energy, it also comes with self-modulating technology.

Pros:

  • Compact design, ideal for the small studio usage
  • Quiet working performance
  • Full power modulation
  • Perfect in places where supplied water is under forty-five degrees Fahrenheit
  • High technology adopt

Cons:

  • Hard to install, require heavy-duty wiring and 240v power
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4. Eccotemp FVI-12 Natural Gas Tankless Water Heater:

Eccotemp FVI-12 Natural Gas Indoor Tankless Water Heater 2019

Features of Eccotemp FVI-12 Gas Tankless Water Heater:

  • Space Saving:

You can mount this tankless water heater literally anywhere you want because of its compact design. Eccotemp FVI-12 Gas Tankless Water Heater does not take a lot of dedicated space.

  • Digital Temp Control:

This tankless water heater comes with a digital temp control which shows temp on the screen and also has two buttons which you can use to adjust the water temp. One button is for the gas setting while the other button is for the flow rate. But it is a little hard to set the exact temp you desire.

  • 6 Gallons Per Minute:

The flow rate that this tankless water provides is 3.6 GPM. You can use a shower, and a low rated kitchen valve ate the same time. If you have a studio family house and need a water heater, then this tankless water heater is the best option for you to choose.

  • Stylish Design:

This unit is lightweight and compact. Such design makes this tankless water heater fit in small spaces in your home. It also has a safe electronic ignition system.

Pros:

  • Provide hot water in a few secs
  • Energy saver
  • Ideal for small house usage
  • Efficient power ventilation
  • Digital temp control
  • Manual water temp control

Cons:

  • Difficult to get the temp you desire exactly
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5. Takagi T-KJr2-IN-LP Indoor Tankless Water Heater:

Takagi T-KJr2-IN-LP Indoor Tankless Water Heater 2019

Features of Takagi T-KJr2-IN-LP Indoor Tankless Water Heater 2019:

  • Space Saving:

This tankless water heater doesn’t take too much space. Its size specifications are 13.8” x 6.7” x 20.3”. The company has also maintained a small design which can make it look good-looking. You can also move this tankless water heart around the house. Also, the unit will be perfect for the homes that have 140,000 BTU (British Thermal Units) gas inputs onwards.

  • Flexibility:

This unit has majored on ground-breaking detailing in the Takagi LP indoor tankless water heater. In it, the manufacturer has included both remote control and power cord. It makes sure that you can control the device even without being closer to it. The proximity of its remote control is capped at six meters. For example, it’s possible to control the device while you’re having a shower or washing the dishes.

  • Perfect For High Altitudes:

In the majority of places, it’s critical to note that the water fixtures have the limitations for altitude. However, with this tankless water heater, you do not have to be anxious about the altitude of the house. It has an unbelievable resistance of approximated six thousand feet above sea level. You have to enable its deep switch setting, which allows it to work at diverse levels.

Pros:

  • Multiple bathroom use accessible
  • Digital remote enabled
  • Lightweight
  • Demands minimal maintenance
  • Simple to install

Cons:

  • You can hear the working noise.
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6. Takagi T-H3-DV-N High-Efficiency Condensing Indoor Natural Gas Tankless Water Heater:

Takagi T-H3-DV-N High-Efficiency Condensing Indoor Natural Gas Tankless Water Heater 2019

Features of Takagi T-H3-DV-N  Tankless Water Heater:

  • Low NO2 Emissions Level:

This unit has an extremely low Nitrogen Oxide emission levels for preventing any harmful gas from escaping into the house. It also assists in decreasing the footprint on our environment. Also, the condenser device makes the device amazingly silent, an outstanding feature contemplating that it’s designed for the indoor fitting.

  • High Volume Output::

The most exceptional feature of this tankless water heater is its capability of providing 10 GPM. With such output rate, plus the natural gas input of about 199,000 British Thermal Units (BTU), this device is capable of supplying hot water to four bathrooms, faucets or washers at the same time without fail.

  • Longevity: 

This unit has the best of American and Japanese water heater technology for ensuring its longevity and durability. The company offers a limited warranty of fifteen years if the device is utilized for domestic purposes. And ten years limited warranty for products utilized in a commercial area. Both enjoy a five-year limited guarantee on its parts and one-year conditional guarantee on labor.

  • High Efficiency: 

Takagi T-H3-DV-N  tankless water heater has numerous cost-cutting features which improve its energy efficiency. It features a self-modulating technology, diagnostics codes, surge protection, 0.95 energy factor, as well as overheating and anti-freeze protection, among others. With this device, you can decrease the water heating bills significantly. Also, the advanced features make sure that the tankless water heater serves you assiduously for years.

Pros:

  • High temp range
  • Remote control accessible with a controller
  • Residential and commercial use
  • Powerful enough
  • Huge water flow
  • Compact shape and lightweight

Cons:

  • Has to be fitted by professionals
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7. Atmor 27kW/240V Electric Tankless Water Heater:

Top Atmor-27kW240V-Electric-Tankless-Water-Heater Reviews

Features:

  • Advanced ThermoPro Technology:

This tankless water heater is equipped with the Atmor’s advanced self-modulating ThermoPro system; this system can regulate the energy amount needed for heating your water. And it’s capable of detecting the water flow automatically, switch it on and off automatically, so as to lower the water consumption and eradicate wasted water flow and.

  • Digital Temp Control:

The digital temp control allows you to set water temp in increments of one degrees, error codes and temp are shown on the screen of the unit. Simple operation setting makes it simple for adjusting the temp precisely.

  • 90 To 135 Degrees Fahrenheit:

The temp range of this tankless water heater can reach between ninety to one hundred and thirty-five degrees Fahrenheit; it can prove to save about fifty percent on energy bill every month. Its corrosion resistance performance and strong stainless steel interior permit for the longer service life and high heat efficiency.

Pros:

  • Strong stainless steel interior
  • Set temp in increments of one degree.
  • Self-modulating system can regulate the energy amount needed for heating the water
  • Save fifty percent on the energy bill
  • Small footprint
  • Can automatically detect the water flow

Cons:

  • Have to fit a pressure relief mechanism, and you have to purchase it from the manufacturer
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8. Eccotemp i12-LP Liquid Propane Indoor Tankless Water Heater:

Best Eccotemp-i12-LP-Liquid-Propane-Indoor-Tankless-Water-Heater reviews

Features:

  • Modern Design:

The modern, sleek design and simple operated display LED control allows for adjusting the water temp simply. The black tempered glass panel is set to show temp, automatic temp controls having the energy-saving mode and child lock are set for evading accidental adjusting.

  • Three Gallons Per Minute Flow Rate:

The flow rate of this indoor tankless water heater is three GPM, it activates just when you demand for the hot water, no pilot light is required and the energy consumption is decreased. It is said to utilize as a whole-house tank, supporting two things at the same time, but we still recommend you to use it for a small or tiny house.

Pros:

  • Stainless steel vent kit
  • Energy efficient
  • Automatic temp control
  • Safe ignition system
  • Simple operation
  • Modern, sleek design

Cons:

  • It requires to be plugged in
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Indoor Tankless Water Heater Features:

When you choose to install an indoor tankless water heater, then you will get to enjoy the following amazing features:

Best Indoor Water Heater

  1. Various Specifications:

For providing you more choices and options, the indoor tankless water heaters have various types and specifications. If you have a large family, then you can definitely go for the indoor large flow rate tankless water heaters like the whole house tankless water heaters. But if you have a small family and a small house, then a portable one would be a good choice.

  1. Large Flow Rate:

Not all of the available indoor tankless water heaters provide you large water flow rate. A few of the POS units have a flow rate as low as two gallons per minute. But as the majority of the indoor tankless water heaters are designed for supporting several bathrooms at the same time, their flow rate can are usually large.

  1. Long Service Life:

Obviously when your tankless water heater is installed inside your house and is far from sunlight and other harsh weather conditions such as rain, and wind then its service life would be longer. The indoor tankless water heaters can have the service life as long as ten to fifteen years. Some of the best indoor tankless water heaters can also reach up to twenty years.

  1. Flexible Installation Spots:

Choosing a spot for installing your new indoor tankless water heater can be really flexible and easy. You can install these units in your bathroom for the shower usage or on the point of use. But if you do not have much space in your bathroom to install your indoor tankless water heater, then you can choose a convenient space anywhere in your house, maybe in your kitchen.

Indoor Tankless Water Heater Types:

According to the using applications of the indoor tankless water heaters, these units are divided into two types: point of use and whole house one.

  1. Point Of Use Indoor Tankless Water Heater:

These indoor tankless water heaters are compact and small in shape. A few of these are small enough that you can easily install them under your kitchen sink. This type of indoor tankless water heaters normally provides a low flow rate, which could be three gallons per minute. Of course, you can really use a few of the large flow rate ones for the point of use units; you only have to install these near the application fixture. It can also shorten the long waiting times. If you want to know more about this type of indoor tankless water heaters then explore the reviews we have provided about the point of use indoor tankless water heaters.

  1. Indoor-tankless-water-heater 2019

    Whole House Indoor Tankless Water Heater:

The whole house indoor tankless water heaters are designed to support your entire house, including multiple faucets and bathrooms. These devices provide a large flow rate, which can reach up to nine gallons per minute and large power. You can also use this type as commercial indoor tankless water heaters. For more information, you can check out the whole house indoor tankless water heaters list that we have detailed.

Also, based on the energy source being used, you can also divide these indoor tankless water heaters into propane indoor tankless water heaters, natural gas indoor tankless water heaters, and electric indoor tankless water heaters.

Which Indoor Tankless Water Heater Is Best, Natural Gas, Propane Or The Electric One?

If you choose to install a propane or natural gas indoor tankless water heater in your house then while installing your device you will also have to install ventilation pipes as well for letting the wasted gas out of your house. But if you choose to install an electric indoor tankless water heater, then you don’t need to worry about the ventilation.

  • The Electric Indoor Tankless Water Heaters are quite flexible when choosing the installation spot for them. As mentioned earlier, you don’t need to install any best indoor tankless water heater 2019ventilation for the electric ones; it makes it easy for you to install it anywhere you want. But using these can cost you a lot.
  • The Propane Indoor Tankless Water Heaters are a little bit on the cleaner side as it does not affect the environment that much. If you want high flow rate and power, then choose this type of tankless water heaters instated of electric ones.
  • The Natural Gas Indoor Tankless Water Heaters can, at times, make use of propane as major power as well. The power of these tankless water heaters is usually large, and you can use these as the whole house indoor tankless water heaters. The using costs of natural gas indoor tankless water heaters are much cheap.

There’re no absolutely great indoor systems, because the budgets, size of families, applications, house locations, and also everyday water use are diverse for every family. Each of these kinds of indoor tankless water heaters has its own shortcomings and benefits, before choosing, you have to take all the things into account. If you have trouble in selecting one, or desire to acquaint more information on every type, then please check out our reviews or visit Amazon.

Indoor Vs. Outdoor Tankless Water Heaters:

The indoor tankless water heaters are designed to be installed inside your house whether you choose to install them in your kitchen wall or bathrooms wall. So there is hardly any chance that it will get affected by the harsh weather conditions. On the other hand, the outdoor tankless water heaters are installed outside of your house. It still requires some enclosure for preventing it from being corroded by the sunshine or rain for a longer time. Even if it has protected cover, the machine gets affected to a large extent. Therefore, when the outdoor systems are compared with the indoor tankless water heaters, they have a shorter service life.

Top Indoor Tankless Water Heater 2019 GudeThe indoor tankless water heaters are flexile to install than the outdoor ones. For the shorter waiting times, you have to install your outdoor tankless water heater right outside your bathroom wall. But you can install your indoor tankless water heater anywhere in the house you think is convenient.

The other difference that these two types have is ventilation. When you have an indoor tankless water heater whether it is natural gas or prone one, it would require ventilation for letting the wasted gas out. However, when you have an outdoor tankless water heater, then you don’t have to worry about the ventilation.

The Cost Of Indoor Tankless Water Heaters:

The costs of all the indoor tankless heater types are different. The cost really depends of these things: flow rate, applications, and power. Usually, the whole house indoor tankless heaters are more expensive than the point of use indoor tankless water heaters. The cost of propane, natural gas, and electric indoor tankless water heaters are also diverse to a great level.

Aside from the cost of the heating system, you ought to also regard utilizing prices as a significant factor. For a few of the tankless water heaters, the utilizing prices are even higher than the buying costs. It is influenced by the waiting time and energy-efficiency of your machine. Besides, the maintenance and installation charges are also a large figure of cash.

Only after integrating both costs elements together can you pick the most cost-effective and suitable one. If you desire to acquaint more about the awesome indoor tankless water heaters available, then you can check out Amazon freely.

Frequently Asked Questions Section:

  1. Do All Of The Indoor Tankless Water Heaters Require Ventilation?

No, just the propane and natural gas indoor tankless water heaters have to have the venting kits, the Indoor electric tankless water heater doesn’t require any ventilation.

  1. Can I Install Indoor Tankless Water Heaters Outdoor?

It really depends, if there’s a clear statement on the devices for the outdoor fitting, then you can really do so. Or it has to be fitted indoor only. You can ask the company certainly before and after purchasing.

We Have Picked Some Best Indoor Tankless Water Heaters For You.

1:  Rinnai RUC98iN Ultra Series Natural Gas Tankless Water 2019:

Rinnai Ultra Series RUC98iN Indoor Tankless Water Heater 2019

2. Rinnai V65IN 6.6 GPM Tankless Water Heater 2019:

Rinnai V65IN Indoor 6.6 GPM Low NOx Tankless Water Heater 2019

The Bottom Line:

There are many applications and types of indoor tankless water heaters. Some of the indoor tankless water heaters we have listed above come with their own pros and cons. But you should always select an indoor tankless water heater by keeping your budget and requirements into consideration. If you would like to know a little bit more about the products, then Visit Amazon freely. There on Amazon, you can also find some big discounts on products which will help you save a lot of money in the end.