Top 8 Electric Tankless Water Heaters for Your Tiny House

Steve Donaldson Master HVAC technician
Steve Donaldson
Master HVAC technician at Quality Comfort Home Services

I am Steve Donaldson, a Master HVAC technician with a rich background in addressing heating issues, especially when it comes to various types of water heaters. Leveraging my extensive expertise, I offer insights and advice to help individuals maintain a warm and secure home environment. Reach out to me at steve.donaldson@tedreviews.com for valuable tips from a seasoned professional in the industry.

Steve Donaldson Master HVAC technician
Steve Donaldson
Master HVAC technician at Quality Comfort Home Services

I am Steve Donaldson, a Master HVAC technician with a rich background in addressing heating issues, especially when it comes to various types of water heaters. Leveraging my extensive expertise, I offer insights and advice to help individuals maintain a warm and secure home environment. Reach out to me at steve.donaldson@tedreviews.com for valuable tips from a seasoned professional in the industry.

Hey there! Looking to find the perfect electric tankless water heater for your tiny house? Well, you've come to the right place! In this roundup post, I'll be sharing the top 8 electric tankless water heaters that are perfect for small spaces like yours. Whether you're looking for efficiency, compact design, or affordability, we've got you covered. So, let's dive in and find the ideal water heater to keep you cozy and comfortable in your tiny home.

1
EcoSmart ECO 18 Electric Tankless Water Heater
✯ Highly recommended! ✯
BUY NOW Amazon.com
8.2
2
Brand: Upgrade
Highly recommended!
BUY NOW Amazon.com
8.7
3
EcoSmart ECO 11 Tankless Water Heater
8.7
1

EcoSmart ECO 18 Electric Tankless Water Heater

 in stock
Amazon.com
8.7
Highly recommended!
The EcoSmart ECO 18 Electric Tankless Water Heater is a highly durable and easy-to-use product that provides an endless supply of hot water, making it perfect for showers. While installation can be costly and complex, it can be easily replaced in the future. The only minor downside is a slight delay in getting hot water compared to traditional tank water heaters.
The Benefits of EcoSmart ECO 18
  • Endless supply of hot water
  • Handles showers without any problem
  • Can be easily replaced in the future
Limitations
  • Installation can be costly and complex, requiring upgrades to the electric panel and running additional cables
  • There may be a slight delay in getting hot water compared to traditional tank water heaters

The EcoSmart ECO 18 Electric Tankless Water Heater is a smart and efficient solution for providing hot water in areas with incoming water temperatures of 62 degrees Fahrenheit and above. With a heating capacity of over 2.5 gallons per minute, this water heater can easily handle the demand of one shower head and one sink simultaneously. The digital temperature control allows for precise temperature settings in 1-degree increments. This highly durable and easy-to-use product is manufactured in China and is compatible with 2 X 40 AMP (DP) breakers. Just be sure to verify the size and electrical requirements before purchase and installation.

Efficient and Reliable Water Heating
  • Highly durable
  • Easy to use
  • Manufactured in China
  • Amperage (amps): 75
  • Activation flow: 0.3 GPM
  • Compatible with 2 X 40 AMP (DP) breakers
2

Brand: Upgrade

 in stock
Amazon.com
8.7
Highly recommended!
The Upgrade Tankless Water Heater Electric 9KW 240V is a compact and energy-saving hot water heater with a digital display for easy temperature control. While the instructions may be lacking, it provides an endless supply of hot water for residential whole house showers.
Advantages of “Brand: Upgrade
  • Compact design
  • Energy-saving self modulation
  • Digital display for easy monitoring
Downsides
  • Lousy instructions
  • Units display temperature in Celsius instead of Fahrenheit

Upgrade your water heating experience with the Tankless Water Heater Electric 9KW 240V. Say goodbye to preheating, temperature fluctuations, and running out of hot water in the tank. This compact, sleek unit provides endless hot water on demand, ensuring a continuous supply for all your needs. With its self-modulating feature, it saves energy and optimizes usage. The digital display adds convenience and ease of use, allowing you to monitor and control the water temperature with precision. Perfect for residential use and whole-house showers, this water heater is a game-changer in providing a reliable and efficient hot water solution.

Enhanced Performance and Functionality
  • Endless hot water supply
  • Self modulation for energy saving
  • Digital display for easy temperature control
  • Suitable for residential whole house showers
3

EcoSmart ECO 11 Tankless Water Heater

 in stock
Amazon.com
8.7
Great choice!
The EcoSmart ECO 11 Electric Tankless Water Heater offers endless on-demand hot water and consistent temperature control, making it a reliable and efficient choice. While it has some minor issues with leaks and potential defects, the manufacturer's excellent customer service and easy installation make it a worthwhile purchase.
Benefits of ECO 11
  • Reliable and solid construction
  • Easy to install
  • Accurate temperature control
  • Manufacturer provides excellent customer service
Drawbacks
  • Persistent leaks from left side connector
  • Potential manufacturer defect on left connector

The EcoSmart ECO 11 Electric Tankless Water Heater is a versatile and efficient solution for providing hot water in your home. With a temperature range of 80-140°F, it can be used for multiple applications depending on your climate. In colder climates, it can provide hot water for one shower, while in warmer climates, it can accommodate two showers. Its patented self-modulating technology ensures consistent hot water with efficiency and performance within 1 degree of the selected temperature. Installation is a breeze, and the unit's fit and finish are of superior quality compared to other brands. Plus, the manufacturer's excellent customer service is worth mentioning, as they went above and beyond to address any concerns and even provided an extra knob when needed. Overall, the EcoSmart ECO 11 is a reliable and user-friendly option for anyone looking for endless on-demand hot water.

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Hot water on demand!
  • Endless on-demand hot water
  • Consistent hot water that never runs out
  • Continuously monitored water temperature
  • Controlled flow rates for efficiency
  • Performance within 1 degree of selected temperature
  • Energy-saving special features
4

Thermomate Electric Tankless Water Heater

 in stock
Amazon.com
8.4
Highly recommended
The thermomate Electric Tankless Water Heater is a reliable and efficient option for providing endless hot water. It offers consistent temperature control, energy-saving features, and a space-saving design. The installation process is generally straightforward, although some users may encounter challenges with the wire gauge. Overall, it is a high-quality product with the power to meet the needs of a single shower and additional appliances.
Benefits
  • Constant output temperature
  • Easy installation
  • Adequate power for single shower with additional appliances
  • Energy-saving self-modulating feature
  • High build quality
Drawbacks
  • Drawbacks:
  • The wire gauge was difficult to work with during installation
  • There was a wiring error that required the assistance of an electrician to fix

The thermomate Electric Tankless Water Heater, 11kW at 240 Volt, is an excellent choice for anyone looking for endless on-demand hot water. With its efficient heating and stable performance, it provides consistent hot water that never runs out. The installation is straightforward, and the instructions are clear, making it easy to connect and test the water before connecting to power. The unit also comes with a mounting template, which is very useful. Additionally, the customer service provided by Thermomate is top-notch, as they responded quickly to any inquiries. Overall, this water heater is a great investment and provides amazing performance.

Efficient
  • Endless on demand hot water
  • Consistent temperature within 1°F of your selected temperature
  • Self-modulating energy saving
  • Space-saving design
  • Fast water heating with a flow rate of 2.15GPM at 35°F rise
5

ECOTOUCH Electric Tankless Water Heater

$299.99  in stock
Amazon.com
as of April 20, 2025 9:43 pm
8.4
Impressive and Reliable
The ECOTOUCH Electric Tankless Hot Water Heater is a powerful and efficient unit that provides instant and endless hot water supply without any waiting time or temperature fluctuations. It has a compact size and sturdy construction, along with a built-in flow meter for monitoring water usage. The only drawbacks are that the access to the wiring is on the side and the unit size is larger than expected. However, the responsive customer service makes up for these minor inconveniences.
Efficient and Cost-effective
  • Quick and efficient hot water production
  • Built-in flow meter for monitoring water usage
  • Sturdy construction
  • Responsive customer service
  • Compact size for installation in tight spaces
Drawbacks
  • Access to the wiring is on the side, not the front
  • The size of the unit is larger than expected

The Electric Tankless Hot Water Heater, ECOTOUCH 18kW, is a powerful and reliable solution for instant and sufficient hot water in your home. With its 18kW smart heating system, it can supply endless hot water of 120℉ or higher in seconds, eliminating the need for preheating and ensuring a comfortable shower experience. This water heater has received positive reviews for its durability and efficient performance. Customers have praised its size, noting that it may be larger than expected but is incredibly sturdy. Additionally, it has been commended for its quick heating capabilities and easy installation process. The only area for improvement mentioned is the accessibility of the wiring, which is located on the side rather than the front. Overall, the ECOTOUCH 18kW Electric Tankless Hot Water Heater is a reliable choice for ensuring hot water on demand throughout your home.

Efficient, Convenient Hot Water Solution
  • Powerful 18kW heating system
  • Instant and endless hot water supply
  • No waiting for preheating
  • No temperature fluctuation during shower time
$299.99
in stock
as of April 20, 2025 9:43 pm
Amazon.com
6

WINTEMP Tankless Water Heater – Portable and Convenient

 in stock
Amazon.com
8.2
Overall
The WINTEMP Tankless Water Heater Electric is an easy-to-install and compact portable water heater that provides instant hot water. With energy-saving technology and a rotatable digital display, it is perfect for small spaces. However, it may not be suitable for high volumes of water and has a low flow at the shower head.
Efficient and Compact
Cons
  • Not enough kilowatts for high volume of water
  • Low flow at shower head

The WINTEMP Tankless Water Heater Electric, 120Volts – 3.5KW Portable Water Heater is an instant use and energy-saving solution for your hot water needs. With its 3500W heating system, you can enjoy hot water directly from the faucet without any preheating required. It's easy to install and works great for faucets and handwashing. While it may not provide a strong flow for showers, it still allows for a comfortable hot shower once you find the right setting. This compact and powerful heater is perfect for small spaces like sewing rooms with bathrooms or emergency situations in RVs. Overall, it's a convenient and efficient choice for on-demand hot water.

Amazing Features Await You!
  • Instant hot water
  • 3.5KW heating system
  • Energy-saving
  • Self-adjusting power input
  • Rotatable digital display
  • Portable and can be installed anywhere
7

ECOTOUCH Electric Tankless Water Heater

 in stock
Amazon.com
7.1
Great option
The Tankless Water Heater Electric 5.5kW 240V is a great choice for anyone looking for instant and endless hot water supply for sinks and point of use applications. It provides consistent water temperature and is easy to install. However, some users may find it difficult to adjust the temperature settings and it may not reach the maximum advertised temperature.
Efficient and Cost-effective
  • Instant and endless hot water supply
  • Consistent water temperature from 77℉ to 131℉
  • Perfect for sinks and point of use applications
Performance Limitations
  • Temperature may not reach the advertised maximum of 120 degrees
  • Difficult to adjust

The Tankless Water Heater Electric 5.5kW 240V, ECOTOUCH Smart Mini Water Heater is the perfect companion for sinks, supplying instant and endless hot water. With a heating system that provides consistent temperatures of 77℉~131℉, there's no waiting for preheating or experiencing terrible temperature fluctuations. It's compact size makes it a great fit for tiny homes, and the customer support is exceptional, always ready to help. While adjusting the water flow may be necessary for optimal performance, this water heater heats up fast and gets hot, making it a recommended choice for others. However, please note that some users have experienced lower temperatures than expected, so adjusting the water flow may be required.

Efficient and Compact Design
  • Instant and endless hot water supply
  • 5.5KW heating system
  • Consistent water temperature from 77℉ to 131℉
  • Perfect for sinks and point of use applications
8

Golden Inverter Electric Tankless Water Heater

 in stock
Amazon.com
5.5
In conclusion, consider alternatives
The Electric Tankless Water Heater is a small and compact unit that provides instant hot water for your kitchen sink. With its LCD digital display and remote control for temperature adjustment, it offers convenience and ease of use. However, there are concerns about the included plug's power rating and long-term durability and safety.
Energy Savings
  • Provides instant hot water for kitchen sink
  • Comes with LCD digital display for easy temperature control
  • Small and compact design, suitable for small spaces
Drawbacks
  • The included plug is rated at 15 Amps, which may not be sufficient for the heater's power requirement
  • Long-term durability and safety concerns due to potential heat buildup and fire risk

The Electric Tankless Water Heater, Small Instant Hot Water Heater for Kitchen Sink, 3000W 110V, With LCD Digital Display (Golden Inverter) is a convenient and efficient solution for getting hot water in your kitchen. With its remote temperature control and LCD display, you can easily adjust the water temperature to your desired level. The stainless steel housing adds durability, while the compact size makes it perfect for small spaces. Say goodbye to washing your hands in cold water with this affordable and reliable water heater.

Efficient and Space-Saving
  • Remote control for temperature adjustment
  • LCD digital display for easy monitoring
  • Stainless steel housing for durability
  • Adjustable water temperature

Explore Other Options

Find answers to your questions about the best electric tankless water heater for your tiny house!

Are electric tankless water heaters energy-efficient for a tiny house setup?

Yes, electric tankless water heaters are generally energy-efficient for a tiny house setup. They heat water on demand, which means they don't have to constantly keep a large tank of water hot. This reduces standby energy losses and helps save energy. Additionally, electric tankless water heaters have high energy efficiency ratings and can provide hot water only when needed, resulting in lower energy consumption compared to traditional water heaters. However, it's important to consider the specific needs and requirements of your tiny house setup and consult with a professional to determine the most suitable and efficient water heating solution.

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What factors should I consider when choosing the best electric tankless water heater for my tiny house?

When choosing the best electric tankless water heater for your tiny house, there are a few factors that you should consider.

Firstly, you should think about the size and capacity of the water heater. Since you have a tiny house, you might not need a large unit that takes up too much space. Look for a compact and appropriately sized water heater that can provide enough hot water for your needs.

Secondly, consider the energy efficiency of the water heater. Look for models that have a high energy efficiency rating, as this will help you save on electricity costs in the long run. Energy-efficient units also have a smaller carbon footprint, which is great for the environment.

Next, think about the temperature rise capability of the water heater. This refers to how much the heater can increase the temperature of the incoming cold water to the desired hot water temperature. Ensure that the unit you choose can handle the temperature rise you require for your hot water needs.

Additionally, pay attention to the flow rate of the water heater. This determines how much hot water the unit can deliver per minute. Consider your household's hot water demands and choose a water heater that can meet those needs without any issues.

Lastly, it's essential to read customer reviews and consider the overall reliability and durability of the water heater. Look for a reputable brand with positive feedback from users to ensure that you're investing in a reliable and long-lasting product.

By considering these factors, you'll be able to choose the best electric tankless water heater that suits your tiny house and provides you with a continuous supply of hot water.

What safety features should I look for in an electric tankless water heater for a tiny house?

When looking for a safe electric tankless water heater for your tiny house, there are a few important features you should consider:

  1. Temperature Control: Opt for a water heater that offers precise temperature control. This will allow you to set the desired water temperature and ensure that it remains consistent, preventing any scalding accidents.
  2. Overheat Protection: Look for a water heater that has built-in overheat protection. This feature will automatically shut off the unit if it detects that the water temperature is exceeding safe limits, preventing any potential hazards.
  3. Dry-Start Protection: It's crucial to choose a tankless water heater with dry-start protection. This feature ensures that the unit will not turn on unless there is sufficient water flow, preventing any damage that could occur if the heater were to run without water.
  4. Pressure Relief Valve: A pressure relief valve is essential as it prevents excessive pressure buildup within the water heater, which can lead to leaks or even explosions. Make sure the unit you choose has a properly functioning pressure relief valve.
  5. Short Circuit Protection: Electric tankless water heaters should have adequate short circuit protection to prevent any electrical mishaps. Look for a unit with proper grounding and circuit protection measures.
  6. Compact Design: Since you are considering a tiny house, it's important to choose a tankless water heater that is compact and space-saving. Ensure that it can be easily installed in a small area without compromising safety or efficiency.
Steve Donaldson Master HVAC technician
Steve DonaldsonMaster HVAC technician at Quality Comfort Home Services

I am Steve Donaldson, a Master HVAC technician with a rich background in addressing heating issues, especially when it comes to various types of water heaters. Leveraging my extensive expertise, I offer insights and advice to help individuals maintain a warm and secure home environment. Reach out to me at steve.donaldson@tedreviews.com for valuable tips from a seasoned professional in the industry.

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