State’s ADAPT™+ Premium condensing gas tankless water heaters are available in 180k and 199k BTU/Hr capacities, deliver powerful, on-demand hot water and flexible installation options for nearly any residential application. Two model types are available: versions with integrated X3® Scale Prevention Technology and Bypass (M) models. Scale prevention can be easily added to any M model by replacing the bypass cartridge with an optional X3 cartridge, sold separately. State’s X3 Technology helps extend the life of the heat exchanger by up to three times compared to standard tankless units, while preserving peak performance.

The ADAPT™+ Premium series have integrated recirculation pumps and a built-in control display that allows users to set and monitor up to two recirculation schedules, view heater status, and access error codes. Temperature settings and remote activation of the heater and recirculation system can be managed using optional remote kits, sold separately. All models are ENERGY STAR® certified, highly efficient with a Uniform Energy Factor (UEF) of 0.95, and meet Ultra-Low NOx emission standards.

All ADAPT™+ Premium water heaters are field-convertible from natural gas to liquid propane with a conversion kit included, and can be installed indoors or outdoors with the addition of an Outdoor Vent Cap Kit (sold separately). For higher-demand applications, up to 12 units can be cascaded together, cascade cable included.

When a water tap is opened, cold water enters the tankless unit and passes through State’s X3® Scale Prevention cartridge, which prevents minerals from bonding and forming scale. 

This advanced design allows mineral particles to flow safely through the system, eliminating the need for routine descaling and extends the life of the water heater by up to three times compared to conventional tankless models.

After treatment, the water flows through a primary heat exchanger where it is quickly heated. State’s condensing tankless water heaters provide endless hot water on demand, save valuable space, and operate only when needed, minimizing energy consumption. 

Backed by a 15-year limited warranty, these water heaters are engineered for long-term performance, reduced maintenance, and reliable comfort. With X3-equipped models, there are no hard water exclusions in the warranty.