- ENERGY STAR® certified with a UEF of 0.95
- Easily maintain like-new performance by adding X3® Scale Prevention at any time with an optional X3 cartridge (sold separately)
- Flexibility in Installation—PVC venting flexibility (2” up to 50’ & 3" up to 150’); Install indoor or outdoor (outdoor kit sold separately)
- Advanced Freeze Protection—Includes internal freeze protection for the heater and optional freeze protection kits for external cartridges
- Expandable for Larger Applications—Cascade up to 12 like heaters when multiple water heaters are required to work in conjunction (cable included)
- Built-in Control Display—Check status, error codes and settings
- Ultra-Low NOx Emissions—Complies with strict air quality management regulations, including SCAQMD Rule 1146.2, for environmentally friendly operation
- Comprehensive Warranty—15-year limited warranty on heat exchanger and 5-year limited warranty on all parts for residential applications
The STM-199M Adapt® SC Standard tankless water heater uses up to 199,000 BTUs of Natural Gas to deliver a max flow rate of 10.5 GPM. State’s Adapt® Standard condensing gas tankless water heaters deliver robust, on-demand performance and the flexibility to install in virtually any residential setting.
Optional X3® Scale Prevention Technology helps maintain like-new performance by protecting the heat exchanger from build-up. Scale prevention protection can prolong the life of the heat exchanger by up to 300% as compared to an unprotected unit.
All models are ENERGY STAR® certified with a Uniform Energy Factor of 0.95 and comply with Ultra-Low NOx regulations. All Adapt® SC models can be installed indoors or outdoors with an Outdoor Vent Cap Kit (sold separately).
Cascade up to 12 like heaters for larger applications requiring multiple water heaters to work in conjunction, cable included.
