Best Electric Tankless Water Heater for Tiny House [In 2025]

When it comes to equipping a tiny house, the choice of a reliable and efficient water heater is crucial. Electric tankless water heaters have become a popular option, offering on-demand hot water without the need for a bulky storage tank. In this comprehensive review, we’ll explore the top electric tankless water heater models suitable for tiny house living.

5 Best Electric Tankless Water Heater for Tiny House Reviews

Tankless Water Heater Electric ，110v 0-3500W Whole House Tankless Hot Water Heater with Led Temperature Display for Indoor or Outdoor Black-5 Years Quality Assurance

Overview

This compact and versatile electric tankless water heater from Tankless Water Heater Electric offers a range of features that make it a great fit for tiny houses. With a power output of 0-3500W and a 110V voltage, it can efficiently heat water on demand while maintaining a small footprint.

Specs

• Power Output: 0-3500W
• Voltage: 110V
• Stainless Steel Water Pipe and Aluminum Heating Body
• LED Temperature Display
• Wall-Mountable Design

Pros

• Durable and corrosion-resistant construction
• Efficient heating with advanced temperature control
• Versatile usage for sinks, kitchens, and more
• Easy installation with wall-mounting capability
• Comprehensive safety features and 5-year quality assurance

Cons

• Not suitable for high-flow applications like showers
• Limited to small, single-point water heating tasks

Customer Review

The Tankless Water Heater Electric has received positive reviews from customers, who appreciate its compact size, easy installation, and reliable performance for small-scale applications. Users report that it effectively heats water for sinks and small appliances, making it a suitable option for tiny house living.

MAREY Power Pak 12 kW Electric Tankless Water Heater

Overview

The MAREY Power Pak 12 kW Electric Tankless Water Heater is a compact and efficient option designed for small spaces, such as tiny houses. With a maximum output of 2.2 GPM, it can provide hot water for multiple points of use, making it a versatile choice for various household needs.

Specs

• Power Output: 12 kW
• Voltage: 220V
• Maximum Flow Rate: 2.2 GPM
• Backlit LCD Display
• Wall-Mounted Design

Pros

• Efficient bare element heating technology
• Suitable for multiple points of use in small spaces
• Electronically controlled for precise temperature regulation
• Compact and space-saving wall-mounted design
• CSA certified for use in the US and Canada

Cons

• Not recommended for elevations above 2000 feet
• May not provide sufficient hot water for larger households

Customer Review

Customers have praised the MAREY Power Pak 12 kW Electric Tankless Water Heater for its efficient heating, easy installation, and suitability for small-scale applications. The compact size and precise temperature control have been highlighted as key benefits, making it a popular choice for tiny house owners.

Electric Tankless Water Heater SIVUATEK 14kW, 240V

Overview

The SIVUATEK 14kW Electric Tankless Water Heater is a powerful and compact option designed to provide on-demand hot water for tiny houses and other small-scale applications. With its self-modulating technology and user-friendly controls, it offers a seamless and energy-efficient hot water solution.

Specs

• Power Output: 14 kW
• Voltage: 240V
• Maximum Flow Rate: 2 Points of Use
• Digital Display and Touch Controls
• Multiple Safety Protections

Pros

• Powerful 14kW heating system for instant hot water
• Self-modulating technology for optimal energy efficiency
• Compact design for easy installation in small spaces
• User-friendly digital display and touch controls
• ETL certification for safety and reliability

Cons

• Requires 240V power supply, which may not be available in all tiny houses
• May not be suitable for high-flow applications like multiple showers

Customer Review

Customers have generally positive experiences with the SIVUATEK 14kW Electric Tankless Water Heater, praising its compact size, easy installation, and consistent hot water delivery. The self-modulating technology and safety features have also been well-received, making it a reliable choice for tiny house owners.

Tankless Hot Water Heater Electric, ECOTOUCH 8kW 240V Instant Water Heater

Overview

The ECOTOUCH 8kW 240V Instant Water Heater is a compact and efficient electric tankless water heater designed for point-of-use applications in tiny houses. With its self-modulating technology and advanced safety features, it offers a reliable and cost-effective hot water solution for small-scale living spaces.

Specs

• Power Output: 8 kW
• Voltage: 240V
• Maximum Flow Rate: 1.2 GPM (North), 2 GPM (South)
• Self-Modulating Technology
• ETL Certification and Multiple Safety Protections

Pros

• Compact and space-saving design for easy installation
• Efficient self-modulating technology for energy savings
• Suitable for point-of-use applications in tiny houses
• Comprehensive safety features and ETL certification
• Cast aluminum heating element for reduced scale buildup

Cons

• May not provide sufficient hot water for multiple fixtures
• Requires a 240V power supply, which may not be available in all tiny houses

Customer Review

Customers have reported positive experiences with the ECOTOUCH 8kW 240V Instant Water Heater, highlighting its reliable performance, easy installation, and energy-saving capabilities. The compact size and self-modulating technology have been praised as key benefits for tiny house living.

Buying Guide: Choosing the Best Electric Tankless Water Heater for Your Tiny House

Power Output

• Determine the appropriate power output (kW) based on your hot water needs and the size of your tiny house.
• Higher power outputs generally provide more hot water, but may require a higher voltage power supply.

Voltage Compatibility

• Ensure the electric tankless water heater is compatible with the voltage available in your tiny house (110V or 240V).
• Some models may require a specific voltage, so check the product specifications carefully.

Flow Rate and Capacity

• Consider the maximum flow rate (GPM) and the number of points of use the water heater can serve.
• Smaller tankless water heaters may be suitable for single-sink applications, while larger models can handle multiple fixtures.

Installation and Mounting

• Look for water heaters with a compact, wall-mountable design that can be easily installed in the limited space of a tiny house.
• Verify the installation requirements, including electrical and plumbing connections, to ensure a smooth installation process.

Safety and Efficiency

• Prioritize electric tankless water heaters with safety features such as leakage protection, overheat protection, and certifications (e.g., ETL, UL).
• Choose models with energy-efficient technologies like self-modulating heating to optimize energy consumption and utility bills.

FAQs

1. Can an electric tankless water heater provide enough hot water for a tiny house?

Yes, electric tankless water heaters can be a suitable option for tiny houses, as long as you choose a model with the appropriate power output and flow rate to meet your hot water needs. Smaller, point-of-use models are often ideal for tiny house applications.

2. What is the difference between a 110V and a 240V electric tankless water heater?

The main difference is the voltage requirement. 110V models generally have a lower power output, while 240V models can provide more powerful and efficient heating. The higher voltage option may be necessary for larger tiny houses or if you need to serve multiple fixtures simultaneously.

3. How do I determine the right size of an electric tankless water heater for my tiny house?

The size of the electric tankless water heater depends on factors like the number of fixtures, expected hot water usage, and the climate. As a general guideline, a 8-14 kW model should be sufficient for most tiny house applications. It’s best to consult with a professional or refer to the manufacturer’s sizing recommendations to ensure you get the right-sized unit.

Conclusion

Choosing the best electric tankless water heater for your tiny house requires careful consideration of factors like power output, voltage compatibility, flow rate, and installation requirements. The models reviewed in this article offer a range of options that cater to the unique needs of tiny house living, providing reliable and efficient hot water solutions. By weighing the pros, cons, and customer feedback for each product, you can make an informed decision that will enhance the comfort and functionality of your tiny house.