8 Best Tankless Water Heater For Tiny House and For Small Home Reviews

The tankless water heater as a frequently used daily residential machine, it can be well used for either large home or tiny home with different flow rates and types. Small or tiny studios are lack of enough space for a large heater especially for tank heater, therefore, we would like to suggest several best tankless water heaters for a tiny house for you.

8 Best Tankless Water Heaters for Tiny House

ProductsNameRatings
best tankless water heater for tiny homeRheem RTEX-13 240V4.8
best tankless water heater for tiny homeRheem RTEX-184.7
best tankless water heater for small homeEcoSmart ECO 274.7
best electric tankless water heater for large homesTakagi T-KJr2-IN-LP4.6
best tankless water heater for small homeEccotemp i12-LP Liquid4.6
best tankless water heater for small homeEccotemp FVI-124.2
best tankless water heater for tiny houseAtmor 27kW/240V4.2
small electric water heaterBosch Tronic 2.5-Gallon4.2

Best Tankless Water Heaters for Tiny House

1. Rheem RTEX-13 240V Heating Chamber Residential Tankless Water Heater

best tankless water heater for tiny home
best tankless water heater for small home

 

 

Features:

  • Compact shape

It weighs light and is designed as a compact small shape, so it is the perfect one for small tiny studio use. You can install it near the point of use and fast heating performance supplies constantly hot water in a few seconds. It takes about 15 seconds for hot water flowing to the hand sink.

  • Easy installation

It is super easy to install all by yourself, takes about 1 hour to hook it up. The multiple stranded wire makes a connection much easier. The maximum flow rate of the unit reaches up to 4 gallons per minute.

  • Stable water temperature

With delicate design, the water temperature stays the same even when used for a long period. Led light and digital temperature settings make it easy to operate and adjust the exact water temperature you want.

Pros:

  1. Perfect for single bathroom use
  2. Money saver on using and installation
  3. Cheap and affordable price
  4. Compact shape
  5. Endless hot water supply
  6. 50-70 degrees F temperature

Cons:

Used for small or tiny house only


2. Rheem RTEX-18 Tankless Water Heater

best tankless water heater for tiny home
best tankless water heater for tiny house

 

 

Features:

  • Easy operation

The temperature of water shows on the screen and can be adjusted one degree a time accurately. Temperature lights up once you turn on the valve and error codes also shows on for reminding.

  • Self-modulation system

It is equipped with the self-modulation system to adjust the power when hot water demand is high. Compared with RTEX-13 series, this unit is more powerful but is also a bit larger than that.

  • Quiet working noise

It works smooth and quiet, no working noise can be heard and no clicking relays either. But the waiting time for hot water is a bit long, takes about 40 or 50 minutes for hot water to flow.

Pros:

  1. Quiet working performance
  2. External digital thermostatic control with LED display
  3. Can be used in cold climate
  4. Durable copper immersion
  5. Handle 1 shower and 1 sink simultaneously

Cons:

Take up a few seconds for the water to heat up


3. EcoSmart ECO 27 Electric Tankless Water Heater

best tankless water heater for small home
best tankless water heater for tiny house

 

 

Features:

  • Space saver

It is designed super light and small, it is regarded as the lightest and smallest one in the full lines of EcoSmart tankless water heaters. After installation, it is said to save 12 cubic feet and thus can be perfectly used for a best tankless water heater for a small house.

  • Digital control system

There is a digital control system for you to operate the heating machine easily, you can adjust water temperature up and down with one increment to find the exact temperature you want.

  • Cost-saving

Self-modulating technology enables the heater to draw energy only when you use it, and well internal design helps you save about 50% in water heating cost. It is able to process up to 3 GPM in cold areas and 6 GPM in warm places.

Pros:

  1. Unlimited hot water supply
  2. Run 2 showers simultaneously
  3. Copper and stainless steel components
  4. Heating elements are easy to be replaced
  5. Digital control system
  6. Large flow rate for constant hot water

Cons:

The temperature can not be set as right as EcoSmart Promises


4. Takagi T-KJr2-IN-LP Indoor Tankless Water Heater

best tankless water heater for small home
best tankless water heater for tiny house

 

 

Features:

  • Stylish light compact shape

This unit is the lightest and smallest among all the Takagi lines of products, it saves much space for your home and you can easily hook it up anywhere in your home. It is also easy to be installed, takes about a few hours to hook it up by yourself.

  • 6.6 GPM flow rate

The flow rate of the unit reaches 6.6 gallons per minute, it is able to supply constantly hot water for multiple bathrooms and kitchen faucets the same time. But when used in cold regions, the flow rate may drop to 3-5 gallons per minute.

  • 150 degrees F temperature

Maximum temperature of it is up to 150 degrees F, capable of meeting the demand of daily residential use. It demands a power input of up to 140000 BTU per hour. Thermal efficiency is 0.81. It is not powerful enough to meet the demand of large house use but is a perfect one for a small home or point of use.

Pros:

  1. Digital remote control
  2. Lightest and smallest among Takagi tankless water heaters
  3. Space saver
  4. Low using and heating costs
  5. Easy to be installed
  6. Constant hot water supply

Cons:

The working noise can be heard


5. Eccotemp i12-LP Liquid Propane Indoor Tankless Water Heater

best tankless water heater for small home
best tankless water heater for tiny house

 

 

Features:

  • 4.8 GPM flow rate

Flow rate range of it is between 0.6 and 4.8 gallons per minute, and the gas rate is between 25000 and 80000 BTU per hour. It supports one bathroom and one kitchen faucet uses the same time.

  • Automatic temperature control

It has automatic temperature control to prevent overheat and keep the water temperature stable, energy-saving mode is adjustable for saving energy, there is also a child lock technology to avoid unintentionally adjusting.

  • Safe electronic ignition system

It needs to plug into a standard 110v electrical outlet with UL-listed cord, electronic ignition system makes it safer in using process. Sleek modern design with easy operated LED display control give you best enjoyment on using.

Pros:

  1. No pilot light needed
  2. Horizontal stainless steel vent kit
  3. Perfect for vacations cabins and small tiny houses use
  4. Sleek simple design
  5. Supports 1 bathroom and 1 sink the same time
  6. Automatic temperature control

Cons:

It needs to be plugged in


6. Eccotemp FVI-12 Liquid Propane Tankless Water Heater

best tankless water heater for small home
best tankless water heater for tiny house

 

 

Features:

  • Gas-powered

The maximum flow rate of it is 3.6 gallons per minute, the self-modulation system makes it activates only when you use it, thus it saves much energy. You need to get ventilation facilities for safety using. It is able to support one bathroom use only but constantly hot water offers.

  • Compact design

The unit is extremely light and you can easily hook it up anywhere you want. Stylish compact shape saves much wall space for a tiny house. It is easy to read digital temperature display but is quite hard to adjust the exact temperature you want.

  • Safe electronic ignition system

The same as Eccotemp i12-LP one we recommended before, this unit also adopts electronic ignition system, you need to plug it into standard 120v electrical outlet with UL-listed cord.

Pros:

  1. Energy saving
  2. Perfect for small home, apartment, and cabin
  3. Low working noise
  4. Small shape and lightweight
  5. Endless hot water supply
  6. Meet the demand for single bathroom use

Cons:

Difficult to adjust the exact temperature you want


7. Atmor 27kW/240V Electric Tankless Water Heater

best tankless water heater for tiny house
best tankless water heater for small house

 

 


Features:

  • Lightweight

It weighs only 17 pounds so you can install it anywhere you want, it is also able to be installed point of use. The small footprint saves much space for you. The installation is also easy and straight forward, anyone who knows about basic knowledge can hook it up under clear instruction.

  • Digital temperature control

Temperature range of the unit is between 90 and 135 degrees F, you can set water temperature in an increment of 1 degree each time. It is also capable of automatically detecting water flow by turning it on and off by itself, thus eliminates wasted water flow and lower water consumption greatly.

  • Energy saver

It is said to save 50% on the electricity bill, Atmor’s advanced ThermoPro self-modulating system is adopted to regulate the amount of energy required to heat water.

Pros:

  1. Long service life
  2. Lightweight and compact shape
  3. Easy installation
  4. Highly energy efficient
  5. Digital temperature control
  6. Durable stainless steel interior

Cons:

You need to buy one pressure relief device from the manufacturer and install along with machine


8. Bosch Tronic 2.5-Gallon Electric Mini-Tank Water Heater

best tankless water heater for tiny house
best tankless water heater for small home

 

 

Features:

  • Sink use only

This unit is a point of use tankless water heater and can be used for kitchen faucet or bathroom sink only. It is able to be wall hung or floor mounted, the waiting time of hot water is super short, takes about 1 second.

  • 2.5 gallons of water flow

2.5 gallons per minute water flow enables to supply constantly hot water for you. But because of its small power, it lacks consistency on water temperature.

  • Small and compact shape

It is super small and can hide underwater sink easily. For fast and large amount of hot water, we suggest it be installed near where you intend to use hot water. The operation of it is also simple, no complicated machinery is added, you need only plug it into the outlet.

Pros:

  1. Perfect for sink
  2. Compact design
  3. Simple operation
  4. Easy installation
  5. Fast recovery on hot water

Cons:

Lack of consistency of water temperature


Features

There are some common features of the best tankless water heaters for small house, when you choose, you can combine the features together and see which one suits your family most.

1. Small shape

Of course, the primary feature of the tankless water heater for a tiny house is the small shape. Owning a tiny house, there will be less space for you to install a large one on the wall. The small and compact shape is able to save a large amount of space for your home. Some of which can even be installed under water sink.

2. Small flow rate

As there will be only one or two bathrooms for a tiny house, the tankless water heater does not need to get such large flow rate, it needs only meet the demand of one bathroom and one sink use the same time. The small flow rate also helps save much energy and heating costs for you.

3. Point of use types

Most of the tankless water heaters for the tiny house are suggested to be installed near the application fixture, it needs only to supply hot water for one bathroom use, thus installing in the bathroom helps reduce the waiting time for hot water, and less cold water is wasted accordingly.

4. Short waiting time

Compared with large home types, tankless water heater for tiny house owns shorter waiting time. The pipe is short and thus it takes only a few seconds for hot water to flow through the pipeline to the destination.

Attention:

If you intend to reduce waiting time and quickly get heated water, you’d better install it near application fixture. And remember to keep machine dry all the time, install it within a safe distance from water for safety.

best tankless water heater for tiny house
best tankless water heater for small tiny home

Types of Small House Tankless Water Heater

Three types of tankless water heaters are frequently known to us, which includes electric type, small propane type, and natural gas types when dividing according to the power source.

The electric tankless water heater is frequently used for a small tiny house, it weighs light and is normally designed into a compact shape. The flow rate and power rate are normally low, meeting the basic demand of tiny house single bathroom use.

Natural gas and propane tankless water heaters are basically the same, they are more frequently used for a large family, owning large flow rate and power, they are capable of providing constant hot water for multiple bathrooms use. Some of the recommended best tankless water heaters for a tiny house with natural gas or propane power can also be used for a large family.

Besides, there are also point of use tankless water heater or under sink tankless water heater. Majority of heating machines are mounted on the wall because of their large shape, but under sink type is normally installed under hand sink, the flow rate of it is super low, meeting the demand of single sink use only. Therefore, if you intend to get one for hand sink, you may consider the under sink heaters.

What We Pick Is…

Among all the best tankless water heaters for a tiny house, we would like to suggest Rheem RTEX-13 Tankless Water Heater for you, it is the hot-selling type on tankless water heater market of 2019. This one weights light and has 4 GPM flow rate, thus is capable of providing constant hot water for bathroom and sink use. The waiting time for hot water is only 15 minutes.

The delicate design makes it easy to operate and adjust the exact water temperature you want. Water temperature always stays the same. If you have interest in such item, please feel free to check more information or product price details on Amazon, the constant discount on Amazon is also helpful for saving a large sum of money for you.

best tankless water heater for tiny home
best tankless water heater for small home