State’s Adapt®+ premium condensing gas tankless water heaters (160K, 180K, and 199K BTU/hr) deliver continuous, on-demand hot water, high efficiency, and flexible installation for residential applications.

Built to Perform 

Engineered for high-performance, high-demand applications and long-term durability, Adapt®+ features a patented heavy-duty helical heat exchanger that outperforms traditional tankless systems. 

The helical heat exchanger design has fewer weld points, creating a stronger, more durable water heater with fewer potential leak paths. With a UEF of up to 0.95, the Adapt®+ is not only ENERGY STAR® certified but also offers high thermal efficiency and corrosion resistance. The Adapt®+ has a high thermal efficiency, built-in corrosion resistance, and an integrated recirculation pump to ensure your home has fast, reliable hot water at all times. This means the Adapt®+ will require less maintenance over time, which means less money out of your pocket in the long run. 



To be more user-friendly, the Adapt®+ features a digital display for easily managing schedules, monitoring performance, and adjusting temperature. You can even activate your Adapt®+ tankless water heater remotely. 

Built to Last 

Adapt®+ is designed to reduce maintenance and extend product life by using State's proven X3® Scale Prevention Technology, which can extend your tankless water heater's life up to 3 times, requiring less maintenance and saving money. 



The State Adapt®+ tankless water heater will be available in an integrated X3® Scale Prevention Technology model and an M bypass model (X3® Scale Prevention filter attachment). 

Built to Adapt

Designed for fast, flexible installation across a wide range of applications. The Adapt®+ can easily be retrofitted or built into new construction with 2” and 3” PVC venting and is compatible with ½” or ¾” gas lines. The Adapt®+ is field-convertible and can be installed indoors or outdoors, and it includes a wall-mount bracket for faster installation.

When a hot water tap is opened, cold water flows through the X3® Scale Prevention Technology cartridge, which prevents minerals from bonding and forming scale. Particles pass harmlessly through the system, reducing the need for routine descaling and helping extend the water heater's life.

The treated water then passes through the helical heat exchanger, where it is rapidly heated. Because Adapt®+ operates only when hot water is needed, it reduces standby energy loss while delivering continuous hot water and space-saving performance.

Backed by one of the strongest warranties in the category, Adapt®+ includes a 15-year limited warranty, offering long-term confidence, lower maintenance costs, and consistent home comfort.