Is the Navien 240A-2 The Best Tankless System?

When it comes to choosing a tankless water heater, the Navien 240A-2 stands out as a top contender. As experienced plumbers who always strive for top quality, it is the brand we stand by and recommend. Known for its efficiency, reliability, and advanced features, this model is an excellent choice for any home. Here’s why we highly recommend the Navien 240A-2 for your tankless water heater needs.

1. High Efficiency and Energy Savings

The Navien 240A-2 is designed with energy efficiency in mind. It boasts a Uniform Energy Factor (UEF) of 0.96, which means it converts nearly all the fuel it uses into hot water. This high efficiency translates to significant energy savings over time, reducing your utility bills and making it an environmentally friendly choice.

2. Advanced Technology

This model features Navien’s Advanced ComfortFlow® technology, which incorporates a built-in recirculation pump and buffer tank. These components work together to reduce the “cold water sandwich” effect, where cold water intermittently flows before the hot water arrives. The result is consistent and immediate hot water delivery, enhancing your comfort and convenience.

3. Compact and Space-Saving Design

The Navien 240A-2’s compact size is perfect for homes where space is at a premium. It can be mounted on a wall, freeing up valuable floor space in your utility room or closet. Despite its small footprint, it delivers a powerful performance, providing ample hot water for your household needs.

4. Durability and Longevity

Navien is known for manufacturing durable and long-lasting water heaters, and the 240A-2 is no exception. It features stainless steel heat exchangers that are more resistant to corrosion and wear compared to copper or other materials. This durability ensures that your water heater will have a longer lifespan, providing reliable service for many years.

5. Eco-Friendly and Low Emissions

The Navien 240A-2 is a low NOx (Nitrogen Oxides) model, which means it emits fewer pollutants compared to traditional water heaters. This eco-friendly feature not only helps you reduce your carbon footprint but also complies with environmental regulations in many areas, making it a responsible choice for your home.

6. Ease of Installation and Maintenance

Thanks to its innovative design, the Navien 240A-2 is relatively easy to install and maintain. It features front-panel access to components, making routine maintenance and servicing straightforward. Additionally, Navien offers excellent customer support and resources to assist with installation and troubleshooting.

7. Smart Technology Integration

The Navien 240A-2 is compatible with the NaviLink™ Wi-Fi control system, which allows you to monitor and control your water heater remotely via a smartphone app. This smart technology integration provides added convenience, enabling you to adjust settings, receive diagnostic notifications, and ensure optimal performance from anywhere.

8. Strong Warranty and Support

Navien backs the 240A-2 with a robust warranty, including a 15-year warranty on the heat exchangers, a 5-year warranty on parts, and a 1-year labor warranty. This comprehensive coverage provides peace of mind, knowing that you’re protected against potential defects and issues.


The Navien 240A-2 tankless water heater is a top-tier choice for homeowners seeking efficiency, reliability, and advanced features. Its high energy efficiency, compact design, advanced technology, and eco-friendly performance make it a standout option in the market. Whether you’re upgrading from a traditional water heater or switching from another tankless model, the Navien 240A-2 is sure to meet and exceed your expectations.

Invest in the Navien 240A-2 today and experience the benefits of endless hot water, reduced energy costs, and enhanced comfort. It’s a decision that will pay off in both the short and long term, making your home a more efficient and enjoyable place to live.