5 Best Electric Tankless Water Heater for Large Home [In 2025]

When it comes to providing a reliable and efficient hot water supply for a large home, an electric tankless water heater can be a game-changer. These compact, on-demand units offer endless hot water without the energy waste of a traditional tank-style heater. In this comprehensive review, we’ll explore the top electric tankless water heater options that are perfect for larger homes, analyzing their features, performance, and overall value.

Electric tankless water heaters are rapidly gaining popularity due to their space-saving design, energy efficiency, and consistent hot water delivery. Unlike traditional tank heaters, these on-demand systems heat water only when it’s needed, eliminating standby heat loss and reducing energy consumption. With a range of power outputs and advanced features, there’s an electric tankless water heater to suit the needs of even the largest homes.

5 Best Electric Tankless Water Heater for Large Home Reviews

Specs

Tankless Water Heater 5.5kw 240V, ECOTOUCH Point-of-Use Digital Display

Specs:

• Heating capacity: 5.5 kW at 240V
• Flow rate: Unlimited hot water on demand
• Dimensions: 11″ x 7.5″ x 2.35″
• Pipe fittings: 1/2″ NPT

Electric Tankless Water Heater, 11Kw 240v, On Demand Instant Water Heater

Specs:

• Heating capacity: 11 kW at 240V
• Flow rate: Unlimited hot water on demand
• Dimensions: Compact wall-mount design
• Pipe fittings: 1/2″ NPT

Tankless Water Heater Electric 6.5kw 240V, ECOTOUCH Point-of-Use

Specs:

• Heating capacity: 6.5 kW at 240V
• Flow rate: Unlimited hot water on demand
• Dimensions: 11″ (H) x 7.5″ (H) x 2.35″ (D)
• Pipe fittings: 1/2″ NPT

Tankless Water Heater Electric, ThermoMate 8kW at 240 Volt

Specs:

• Heating capacity: 8 kW at 240V
• Flow rate: 1.56 GPM at 35°F temperature rise
• Dimensions: Compact wall-mount design
• Pipe fittings: 1/2″ NPT

Airthereal Electric Tankless Water Heater, 9kW, 240Volts

Specs:

• Heating capacity: 9 kW at 240V
• Flow rate: Unlimited hot water on demand
• Dimensions: Compact wall-mount design
• Pipe fittings: 1/2″ NPT

Pros

Tankless Water Heater 5.5kw 240V, ECOTOUCH Point-of-Use Digital Display

Pros:

• Instant and consistent hot water supply
• Self-modulating technology for energy efficiency
• Compact and versatile installation options
• Multiple safety features for worry-free operation

Electric Tankless Water Heater, 11Kw 240v, On Demand Instant Water Heater

Pros:

• Powerful 11 kW heating capacity for large homes
• Energy-saving self-modulating technology
• Compact wall-mount design to save space
• Comprehensive safety protection features

Tankless Water Heater Electric 6.5kw 240V, ECOTOUCH Point-of-Use

Pros:

• Instant and sufficient hot water supply
• Smart self-modulation for energy efficiency
• Easy-to-use digital display and touch controls
• Durable construction with safety features

Tankless Water Heater Electric, ThermoMate 8kW at 240 Volt

Pros:

• Powerful 8 kW heating capacity
• Self-modulating technology for energy savings
• Compact wall-mount design to save space
• ETL certification for safety and quality

Airthereal Electric Tankless Water Heater, 9kW, 240Volts

Pros:

• Continuous supply of hot water on demand
• Compact, space-saving wall-mount design
• Energy-efficient self-modulating technology
• Advanced safety features for worry-free use

Cons

Tankless Water Heater 5.5kw 240V, ECOTOUCH Point-of-Use Digital Display

Cons:

• May not be suitable for very high-demand applications
• Requires a 240V electrical circuit for installation

Electric Tankless Water Heater, 11Kw 240v, On Demand Instant Water Heater

Cons:

• Requires a 240V, 60 AMP circuit breaker for installation
• May be overkill for smaller households

Tankless Water Heater Electric 6.5kw 240V, ECOTOUCH Point-of-Use

Cons:

• Requires a 240V electrical circuit for installation
• May not be suitable for very high-demand applications

Tankless Water Heater Electric, ThermoMate 8kW at 240 Volt

Cons:

• Requires a 240V, 40 AMP circuit breaker for installation
• May not be the most budget-friendly option

Airthereal Electric Tankless Water Heater, 9kW, 240Volts

Cons:

• Requires a 240V, 40 AMP circuit breaker for installation
• May not be suitable for the highest hot water demands

Customer Reviews

Customers have generally expressed a high level of satisfaction with these electric tankless water heaters. Many appreciate the instant and consistent hot water supply, the energy-saving features, and the compact, space-saving design. The ease of installation and the safety features also receive positive feedback. While some customers have reported minor issues with the wiring or initial setup, the overall customer reviews are overwhelmingly positive, with users praising the performance and value of these tankless water heaters.

Buying Guide

Factors to Consider When Choosing an Electric Tankless Water Heater for a Large Home

Heating Capacity

The most important factor is the heating capacity, measured in kilowatts (kW). For a large home, you’ll want a model with a higher heating capacity, typically in the range of 8-11 kW, to ensure sufficient hot water supply for multiple fixtures and high-demand applications.

Flow Rate

Flow rate, measured in gallons per minute (GPM), is another crucial consideration. Look for a model that can provide a high flow rate, ideally 1.5 GPM or higher, to meet the hot water needs of your large home.

Energy Efficiency

Look for tankless water heaters with advanced features like self-modulating technology, which adjusts power input based on water flow and temperature, maximizing energy efficiency and cost savings.

Safety Features

Ensure the water heater you choose has robust safety features, such as overheating protection, dry heating protection, and leakage prevention, to provide peace of mind and reliable operation.

Installation and Compatibility

Verify that the tankless water heater you select is compatible with your home’s electrical system and plumbing, and consider the ease of installation, as some models may require a dedicated 240V circuit.

FAQ

1. How much power do I need for an electric tankless water heater in a large home?

For a large home, you’ll typically want an electric tankless water heater with a heating capacity of 8-11 kW, which can provide sufficient hot water for multiple fixtures and high-demand applications.

2. Can an electric tankless water heater handle the hot water needs of a large family?

Yes, the electric tankless water heaters reviewed in this article are well-suited for large homes and families. Their high heating capacities and flow rates can meet the hot water demands of multiple concurrent users.

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

Consider the number of bathrooms, the expected hot water usage, and the overall size of your home. Look for a model with a heating capacity and flow rate that can accommodate your household’s hot water needs, while also taking into account the available electrical capacity in your home.

4. Are electric tankless water heaters more energy-efficient than traditional tank-style heaters?

Yes, electric tankless water heaters are generally more energy-efficient than traditional tank-style water heaters. They only heat water on demand, eliminating the standby energy losses associated with maintaining a tank of hot water.

5. How difficult is it to install an electric tankless water heater in a large home?

The installation difficulty can vary depending on the specific model and your home’s electrical and plumbing setup. Many of the tankless water heaters reviewed here are designed for relatively easy installation, but it’s always a good idea to consult a licensed electrician or plumber to ensure a safe and proper installation.

Conclusion

When it comes to providing reliable and efficient hot water for a large home, electric tankless water heaters offer a compelling solution. The models reviewed in this article showcase a range of power outputs, advanced features, and space-saving designs to cater to the needs of even the most demanding households. By considering factors like heating capacity, flow rate, energy efficiency, and safety features, you can find the perfect electric tankless water heater to meet your home’s hot water requirements. With their endless hot water supply, energy savings, and compact footprint, these cutting-edge water heaters are a game-changer for large homes.