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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® 40-Gallon Atmospheric Vent Tall Natural Gas Water Heater
ProLine® 40-Gallon Atmospheric Vent Tall Natural Gas Water Heater Model GCR-40 410
  • 40,000 BTU input
  • 80-gallon first hour rating
  • 6-Year Warranty
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ProLine® 50-Gallon Atmospheric Vent Tall Natural Gas Water Heater
ProLine® 50-Gallon Atmospheric Vent Tall Natural Gas Water Heater Model GCR-50 400
  • 40,000 BTU input
  • 84-gallon first hour rating
  • 6-Year Warranty
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ProLine® 75-Gallon High Recovery Atmospheric Vent Natural Gas Water Heater
ProLine® 75-Gallon High Recovery Atmospheric Vent Natural Gas Water Heater Model PCG-75L 400
  • 75,100 BTU input
  • 125-gallon first hour rating
  • 10-Year Warranty
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ProLine® 30-Gallon Atmospheric Vent Short Natural Gas Water Heater
ProLine® 30-Gallon Atmospheric Vent Short Natural Gas Water Heater Model GCBL-30R 400
  • 32,000 BTU input
  • 65-gallon first hour rating
  • 6-Year Warranty
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ProLine® 40-Gallon Atmospheric Vent Short Natural Gas Water Heater
ProLine® 40-Gallon Atmospheric Vent Short Natural Gas Water Heater Model XCRL-40 400
  • 40,000 BTU input
  • 67-gallon first hour rating
  • 10-Year Warranty
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ProLine® 75-Gallon High Recovery Atmospheric Vent Natural Gas Water Heater
ProLine® 75-Gallon High Recovery Atmospheric Vent Natural Gas Water Heater Model FCG-75 400
  • 75,100 BTU input
  • 125-gallon first hour rating
  • 6-Year Warranty
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ProLine® 40-Gallon Direct Vent Natural Gas Water Heater
ProLine® 40-Gallon Direct Vent Natural Gas Water Heater Model GDV-40L 300
  • 38,000 BTU input
  • 64-gallon first hour rating
  • 6-Year Warranty
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ProLine® 100-Gallon Ultra-Low NOx High Recovery Gas Water Heater
ProLine® 100-Gallon Ultra-Low NOx High Recovery Gas Water Heater Model GCN-100 100
  • 75,100 BTU input
  • 81-gallon first hour rating
  • 6-Year Warranty
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ProLine® 30-Gallon Atmospheric Vent Tall Natural Gas Water Heater
ProLine® 30-Gallon Atmospheric Vent Tall Natural Gas Water Heater Model GCR-30R 400
  • 32,000 BTU input
  • 52-gallon first hour rating
  • 6-Year Warranty
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ProLine® 50-Gallon Atmospheric Vent Tall Natural Gas Water Heater
ProLine® 50-Gallon Atmospheric Vent Tall Natural Gas Water Heater Model GCG-50L 400
  • 40,000 BTU input
  • 81-gallon first hour rating
  • 6-Year Warranty
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ProLine® 50-Gallon Atmospheric Vent Tall Natural Gas Water Heater
ProLine® 50-Gallon Atmospheric Vent Tall Natural Gas Water Heater Model XCR-50L 400
  • 40,000 BTU input
  • 84-gallon first hour rating
  • 10-Year Warranty
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ProLine® 50-Gallon Ultra-Low Nox Atmospheric Vent Tall Natural Gas Water Heater
ProLine® 50-Gallon Ultra-Low Nox Atmospheric Vent Tall Natural Gas Water Heater Model GURT-50L 450
  • 50,000 BTU input
  • 91-gallon first hour rating
  • 6-Year Warranty
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ProLine® 50-Gallon Direct Vent Natural Gas Water Heater
ProLine® 50-Gallon Direct Vent Natural Gas Water Heater Model GDV-50L 300
  • 40,000 BTU input
  • 77-gallon first hour rating
  • 6-Year Warranty
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ProLine® 40-Gallon Atmospheric Vent Short Natural Gas Water Heater
ProLine® 40-Gallon Atmospheric Vent Short Natural Gas Water Heater Model XCBL-40 400
  • 40,000 BTU input
  • 68-gallon first hour rating
  • 10-Year Warranty
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ProLine® 50-Gallon Atmospheric Vent Tall Natural Gas Water Heater
ProLine® 50-Gallon Atmospheric Vent Tall Natural Gas Water Heater Model GCRT-50L 400
  • 50,000 BTU input
  • 89-gallon first hour rating
  • 6-Year Warranty
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Showing 1-15 of 59
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