5 Best Electric Tankless Water Heater for Family of 5 [In 2025]

As a family of five, having a reliable and efficient water heater is crucial for your daily needs. An electric tankless water heater can be an excellent solution, providing endless hot water on demand while saving space and energy. In this comprehensive review, we will explore the top electric tankless water heaters that cater to the needs of a family of five, helping you make an informed decision for your home.

5 Best Electric Tankless Water Heater for Family of 5 Reviews

Airthereal Electric Tankless Water Heater, 27kW, 240Volts

Overview

The Airthereal Electric Tankless Water Heater is a powerful and versatile option for a family of five. With its 27kW capacity and 240-volt power, this unit can provide endless hot water for multiple simultaneous uses, making it an ideal choice for homes with high hot water demands.

Specs

• Capacity: 27kW, 240 Volts
• Flow Rate: Suitable for up to 3 showers
• Dimensions: Compact wall-mounted design
• Safety Features: High-temperature protection, dry heating protection, and electrical leakage protection

Pros

• Endless hot water on demand
• Energy-efficient self-modulating technology
• Compact and space-saving design
• Comprehensive safety features

Cons

• Requires 240-volt electrical setup and specific wiring configuration
• Higher upfront cost compared to traditional tank-style water heaters

Customer Review

The Airthereal Electric Tankless Water Heater has received positive reviews from customers, with many praising its ability to provide consistent and reliable hot water for their families. One customer mentioned, “This is seriously a game-changer in our life!!! Everyone can shower back-to-back before bed, and no one has to get stuck with a potentially cold one.”

CAMPLUX Electric Tankless Water Heater 4.5kW 120V

Overview

The CAMPLUX Electric Tankless Water Heater is a compact and energy-efficient option for a family of five. Designed for point-of-use installation, this 4.5kW, 120V unit can provide instant hot water on demand, making it a great choice for sinks, wet bars, and other small-scale applications.

Specs

• Capacity: 4.5kW, 120 Volts
• Flow Rate: Temperature rise of 50°F at 1.0 GPM
• Dimensions: Compact 10.95″ x 2.52″ x 7.4″ design
• Safety Features: Overheating protection, dry heating protection, and electrical leakage protection

Pros

• Instant hot water delivery with minimal wait time
• Highly energy-efficient with self-modulating technology
• Compact and space-saving design
• CSA-listed for safety and reliability

Cons

• May not be suitable for whole-home hot water needs
• Requires hardwiring and dedicated circuit

Customer Review

Customers have generally had positive experiences with the CAMPLUX Electric Tankless Water Heater. One reviewer noted, “Works awesome, inexpensive, needs two 220 circuits but you already know that and how else would it heat this much water instantly.”

ThermoMate Mini Tank Water Heater Electric, 6.5 Gallons

Overview

The ThermoMate Mini Tank Water Heater is a compact, point-of-use solution for a family of five. With a 6.5-gallon tank and 120V power, this unit can provide instant hot water where you need it, reducing the wait time and ensuring a reliable supply of hot water for your household.

Specs

• Capacity: 6.5-gallon tank, 120 Volts
• Dimensions: 17.7″ x 17.7″ x 14.6″ compact design
• Temperature Range: 50°F to 149°F with adjustable settings
• Safety Features: Temperature and pressure relief valve, UL listing

Pros

• Instant hot water delivery with fast recovery
• Compact and versatile design for under-sink or floor mounting
• Adjustable temperature settings for personalized comfort
• Premium quality construction with glass-lined tank

Cons

• May not provide enough hot water for whole-home needs
• Limited flow rate compared to tankless models

Customer Review

Customer reviews for the ThermoMate Mini Tank Water Heater are limited, as it is a relatively new product on the market. However, the overall design and features seem to cater well to the needs of a family of five for point-of-use hot water applications.

Tankless Water Heater Electric 110v, 3500W

Overview

The Tankless Water Heater Electric 110v, 3500W is a compact and energy-efficient option for a family of five. This 3500W, 110V unit can provide instant hot water on demand, making it a great choice for sinks, laundry, and other small-scale applications.

Specs

• Capacity: 3500W, 110 Volts
• Flow Rate: Instant hot water within 3 seconds
• Dimensions: Compact wall-mounted design
• Safety Features: Overheating protection, dry burning protection, and IPX4 waterproofing

Pros

• Constant temperature heating system for stable hot water
• Adjustable temperature settings for personalized comfort
• Compact and easy-to-install design
• Energy-efficient operation with 99% thermal efficiency

Cons

• May not be suitable for whole-home hot water needs
• Limited to 110V power supply

Customer Review

The Tankless Water Heater Electric 110v, 3500W has received limited customer reviews, as it is a newer product on the market. However, the features and specifications suggest it could be a reliable and efficient option for a family of five’s point-of-use hot water needs.

Tankless Water Heater Electric, MIZUDO 11kW 240V

Overview

The MIZUDO Tankless Water Heater is a high-powered, 11kW, 240V option that can meet the hot water demands of a family of five. With its on-demand heating and flow rate of up to 2.6 GPM, this unit can provide endless hot water for multiple simultaneous uses.

Specs

• Capacity: 11kW, 240 Volts
• Flow Rate: Up to 2.6 GPM
• Dimensions: Compact 14.3″ x 9.6″ x 2.8″ design
• Safety Features: Overheating protection, leak detection, and ETL certification

Pros

• Endless hot water on demand for multiple use cases
• Compact and space-saving design for easy installation
• Customizable temperature settings for personalized comfort
• Multiple safety features for reliable and secure operation

Cons

• Requires 240V electrical setup and specific wiring configuration
• Higher upfront cost compared to some other options

Customer Review

The MIZUDO Tankless Water Heater has received positive feedback from customers, with one reviewer noting, “Hi quality, easy to install, works perfectly.” The unit’s performance and quality seem to be well-received by those who have purchased and installed it.

Buying Guide: Choosing the Best Electric Tankless Water Heater for a Family of 5

Capacity and Flow Rate

• Consider the hot water needs of your family of five, including the number of simultaneous uses (showers, sinks, etc.) and the desired flow rate.
• Look for units with a high enough capacity (in kW or BTU) to meet your household’s hot water demands.
• Ensure the flow rate (in GPM) is sufficient to provide hot water to multiple fixtures at once.

Electrical Requirements

• Determine the voltage (120V or 240V) and amperage (amps) required for the tankless water heater, and ensure your home’s electrical system can accommodate it.
• Some models may require dedicated circuits and specialized wiring, so be prepared to make the necessary electrical upgrades.
• Consider the overall energy efficiency and potential cost savings of the unit, as electric tankless water heaters can be more energy-efficient than traditional tank-style heaters.

Installation and Space Considerations

• Measure the available space in your home where you plan to install the tankless water heater, and choose a unit with a compact and wall-mounted design if space is limited.
• Ensure the installation location allows for easy access to water and electrical connections, as well as any necessary venting or drainage requirements.
• Opt for a model with straightforward installation instructions and consider seeking the assistance of a professional plumber or electrician if necessary.

Safety Features

• Look for tankless water heaters with comprehensive safety features, such as overheating protection, dry heating protection, and electrical leakage protection.
• Ensure the unit is certified by reputable organizations (e.g., ETL, CSA) for safety and reliability.
• Consider the overall durability and longevity of the unit, as tankless water heaters can have a longer lifespan than traditional tank-style heaters.

Customer Reviews and Warranty

• Read customer reviews to understand the real-world performance, reliability, and customer satisfaction of the tankless water heater you’re considering.
• Evaluate the manufacturer’s warranty coverage, including the length of the warranty and the specific components or features that are covered.
• Choose a model with a reputable brand and a warranty that provides peace of mind for your family’s hot water needs.

FAQs

1. How much hot water do I need for a family of 5?

The amount of hot water needed for a family of five can vary depending on your household’s specific usage patterns, but as a general guideline, you’ll want a tankless water heater with a capacity of at least 27kW or 11kW, depending on the voltage (240V or 110V).

2. Do electric tankless water heaters save money?

Yes, electric tankless water heaters can save you money on your energy bills compared to traditional tank-style water heaters. They only heat water on demand, reducing standby energy losses and providing up to 50% energy savings.

3. How do I choose the right size tankless water heater for my home?

When choosing a tankless water heater, consider the number of bathrooms, the number of people in your household, and the desired flow rate. A qualified plumber can help you determine the appropriate size and capacity for your family’s hot water needs.

4. Are electric tankless water heaters reliable?

Yes, modern electric tankless water heaters are generally reliable and durable, with many featuring advanced safety features and long warranty coverage. However, proper installation and maintenance are crucial for ensuring optimal performance and longevity.

5. Can a tankless water heater run out of hot water?

Tankless water heaters are designed to provide endless hot water on demand, so they won’t run out of hot water like a traditional tank-style heater. However, if the hot water demand exceeds the unit’s capacity, the water temperature may drop, indicating the need for a larger or additional tankless water heater.

Conclusion

Choosing the best electric tankless water heater for a family of five requires considering factors such as capacity, flow rate, electrical requirements, installation, safety features, and customer reviews. The models reviewed in this guide, including the Airthereal, CAMPLUX, ThermoMate, and MIZUDO units, offer a range of options to meet the hot water needs of a larger household. By carefully evaluating your family’s requirements and the features of these tankless water heaters, you can make an informed decision and ensure a reliable and efficient hot water solution for your home.