Top 5 Best Tankless Water Heaters 2024

Looking for the most efficient and reliable tankless water heater for your home? We've thoroughly tested and compared dozens of models to bring you the absolute best options available in 2024. Our comprehensive guide focuses on the top 5 units that offer exceptional energy savings, endless hot water supply, and outstanding value for your investment.

5. Electric Tankless Water Heater 18KW

This 18KW tankless water heater is a space-saving marvel, delivering instant hot water with impressive efficiency. Its LED display and multiple safety features provide peace of mind, while the ability to handle 2 simultaneous showers makes it perfect for busy households.

Pros:

• Instant and continuous hot water supply with 1.9-4.8 GPM flow rate.
• Comprehensive safety features including waterproof design and leak protection.
• Space-efficient and energy-saving design with 99% efficiency.

Cons:

• Complex installation requirements with specific voltage and amperage needs.
• Initial setup complexity due to required air purging procedure.

View on amazon

4. GASLAND Portable Water Heater

This portable propane water heater is perfect for off-grid adventures. With its impressive 1.58GPM flow and LED display, it delivers reliable hot water wherever you need it. The battery-powered ignition and multiple safety features make it both convenient and secure. Ideal for camping and RV enthusiasts.

Pros:

• Versatile portable use for camping, RV, and outdoor activities.
• Comprehensive safety features and CSA certified.
• Good water output (1.58 GPM) with low pressure start-up.

Cons:

• Limited weather resistance - not fully waterproof.
• Requires careful installation to avoid gas leaks.

View on amazon

3. Electric Tankless Water Heater 18kW

This 18kW tankless water heater is an efficient solution for homes needing multiple hot water points. With its impressive 4.3GPM flow rate and adjustable temperature control, it delivers reliable performance. The LED display and safety features make it user-friendly, while its 99% efficiency helps cut heating costs significantly.

Pros:

• Energy efficient with 60% cost savings and 99% thermal efficiency.
• Compact design with easy installation flexibility.
• Multiple safety features and CSA certified.

Cons:

• Limited simultaneous usage to 2-3 points.
• Specific electrical requirements including 240V and dual 40amp breakers.

View on amazon

2. Stiebel Eltron Tankless Heater

This advanced tankless water heater is a game-changer for homes seeking endless hot water. Its compact design and digital controls make it user-friendly, while the continuous flow technology ensures consistent temperatures. The impressive warranty and energy-saving features make it a smart investment.

Pros:

• Consistent hot water with advanced flow control.
• Energy efficient with auto-modulation.
• Compact, space-saving design.

Cons:

• High electrical service requirement (150A).
• Premium price point.

View on amazon

1. Tankless Water Heater 27kW

This 27kW tankless water heater is an excellent choice for endless hot water supply. With its impressive 5.27GPM flow rate and digital temperature controls, it offers both convenience and efficiency. The self-modulating power and potential 60% cost savings make it a smart investment for any home.

Pros:

• Instant and unlimited hot water with 5.27 GPM flow rate.
• Highly energy efficient (99.8%) with self-modulating technology.
• Space-saving design with compact wall-mounted installation.

Cons:

• Complex installation requirements with specific electrical setup (120Amp, 3x40AMP breakers).
• High power demands may require electrical system upgrades.

View on amazon