ProLine Residential Gas Tankless Water Heaters

Residential Gas Tankless Water Heaters

State Water Heaters presents a comprehensive lineup of natural gas and propane tankless water heaters, ensuring uninterrupted hot water supply. Select from ENERGY STAR® certified condensing models for maximum efficiency or non-condensing models for reliable performance tailored to your preferences.

State Water Heaters
Showing 1-8 of 8
Display:
Sort by:
Refine your results
  • (8)
  • (6)
  • (8)
  • (12)
  • (24)
  • (6)
  • (8)
  • (4)
  • (4)
  • (8)
  • (4)
  • (4)
  • (8)
  • (8)
  • (4)
  • (4)
  • (4)
  • (4)
  • (8)
Try our Water Heater Selector
Use our
Water Heater Selector
Find your Water Heater
Showing 1-8 of 8
Display:
Sort by:
filter
Adapt® NC Non-Condensing Ultra-Low NOx Indoor 199,000 BTU Natural Gas Tankless Water Heater with X3® Scale Prevention Technology
Adapt® NC Non-Condensing Ultra-Low NOx Indoor 199,000 BTU Natural Gas Tankless Water Heater with X3® Scale Prevention Technology Model STI-199X3-N 100
  • X3® scale prevention extends life up to three times versus unprotected unit
  • 199,000 BTU input
  • 15-year limited warranty on heat exchanger in residential applications
View Model
Adapt® NC Non-Condensing Ultra-Low NOx Indoor 180000 BTU Natural Gas Tankless Water Heater with X3® Scale Prevention Technology
Adapt® NC Non-Condensing Ultra-Low NOx Indoor 180000 BTU Natural Gas Tankless Water Heater with X3® Scale Prevention Technology Model STI-180X3-N 100
  • X3® scale prevention extends life up to three times versus unprotected unit
  • 180,000 BTU input
  • 15-year limited warranty on heat exchanger in residential applications
View Model
Adapt® NC Non-Condensing Ultra-Low NOx Indoor 199,000 BTU Natural Gas Tankless Water Heater
Adapt® NC Non-Condensing Ultra-Low NOx Indoor 199,000 BTU Natural Gas Tankless Water Heater Model STI-199B-N 100
  • 199,000 BTU input
  • Ultra Low NOx Emissions
  • 10-year limited warranty on heat exchanger in residential applications
View Model
Adapt® NC Non-Condensing Ultra-Low NOx Indoor 180,000 BTU Natural Gas Tankless Water Heater
Adapt® NC Non-Condensing Ultra-Low NOx Indoor 180,000 BTU Natural Gas Tankless Water Heater Model STI-180B-N 100
  • 180,000 BTU input
  • Ultra Low NOx Emissions
  • 10-year limited warranty on heat exchanger in residential applications
View Model
Adapt® NC Non-Condensing Ultra-Low NOx Outdoor 199,000 BTU Natural Gas Tankless Water Heater with X3® Scale Prevention Technology
Adapt® NC Non-Condensing Ultra-Low NOx Outdoor 199,000 BTU Natural Gas Tankless Water Heater with X3® Scale Prevention Technology Model STO-199X3-N 100
  • X3® scale prevention extends life up to three times versus unprotected unit
  • 199,000 BTU input
  • 15-year limited warranty on heat exchanger in residential applications
View Model
Adapt® NC Non-Condensing Ultra-Low NOx Outdoor 180,000 BTU Natural Gas Tankless Water Heater with X3® Scale Prevention Technology
Adapt® NC Non-Condensing Ultra-Low NOx Outdoor 180,000 BTU Natural Gas Tankless Water Heater with X3® Scale Prevention Technology Model STO-180X3-N 100
  • X3® scale prevention extends life up to three times versus unprotected unit
  • 180,000 BTU input
  • 15-year limited warranty on heat exchanger in residential applications
View Model
Adapt® NC Non-Condensing Ultra-Low NOx Outdoor 199,000 BTU Natural Gas Tankless Water Heater
Adapt® NC Non-Condensing Ultra-Low NOx Outdoor 199,000 BTU Natural Gas Tankless Water Heater Model STO-199B-N 100
  • 199,000 BTU input
  • Ultra Low NOx Emissions
  • 10-year limited warranty on heat exchanger in residential applications
View Model
Adapt® NC Non-Condensing Ultra-Low NOx Outdoor 180,000 BTU Natural Gas Tankless Water Heater
Adapt® NC Non-Condensing Ultra-Low NOx Outdoor 180,000 BTU Natural Gas Tankless Water Heater Model STO-180B-N 100
  • 180,000 BTU input
  • Ultra Low NOx Emissions
  • 10-year limited warranty on heat exchanger in residential applications
View Model
Showing 1-8 of 8
Try our Water Heater Selector
Use our
Water Heater Selector
Find your Water Heater
Get it installed by a Local Pro
Get it installed by a

Local Pro

State Water Heaters are available through your local plumbing professional.
Find a Local Pro
of 2
selected
of 4
selected
Select 2-4 Products Compare Now
Clear Filters