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Residential Gas Tank Water Heaters

From high-efficiency ENERGY STAR® certified water heaters to economical standard efficiency gas water heaters, A. O. Smith has a complete line of natural gas and liquid propane tank water heaters to fit your needs.

A. O. Smith
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ProLine® Master 50-Gallon Ultra-Low NOx Atmospheric Vent Tall Natural Gas Water Heater
ProLine® Master 50-Gallon Ultra-Low NOx Atmospheric Vent Tall Natural Gas Water Heater Model HUR-50
  • 40,000 BTU input
  • 84-gallon first hour rating
  • 8-Year Warranty
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ProLine® Master 40-Gallon Atmospheric Vent Tall Natural Gas Water Heater
ProLine® Master 40-Gallon Atmospheric Vent Tall Natural Gas Water Heater Model HWR-40
  • 40,000 BTU input
  • 80-gallon first hour rating
  • 8-Year Warranty
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ProLine® Master 50-Gallon Ultra-Low NOx Atmospheric Vent Tall Natural Gas Water Heater
ProLine® Master 50-Gallon Ultra-Low NOx Atmospheric Vent Tall Natural Gas Water Heater Model HUC-50
  • 40,000 BTU input
  • 84-gallon first hour rating
  • 8-Year Warranty
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ProLine® Master 40-Gallon Ultra-Low NOx Atmospheric Vent Tall Natural Gas Water Heater
ProLine® Master 40-Gallon Ultra-Low NOx Atmospheric Vent Tall Natural Gas Water Heater Model HUR-40
  • 40,000 BTU input
  • 83-gallon first hour rating
  • 8-Year Warranty
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ProLine® Master 40-Gallon Ultra-Low NOx Atmospheric Vent Tall Natural Gas Water Heater
ProLine® Master 40-Gallon Ultra-Low NOx Atmospheric Vent Tall Natural Gas Water Heater Model HUC-40
  • 40,000 BTU input
  • 83-gallon first hour rating
  • 8-Year Warranty
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