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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® Master 40-Gallon Atmospheric Vent Tall Natural Gas Water Heater
ProLine® Master 40-Gallon Atmospheric Vent Tall Natural Gas Water Heater Model HWR-40 410
  • 40,000 BTU input
  • 80-gallon first hour rating
  • 8-Year Warranty
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ProLine® 40-Gallon Mobile Home Direct Vent Tall Natural Gas Water Heater
ProLine® 40-Gallon Mobile Home Direct Vent Tall Natural Gas Water Heater Model FMDV-40 250
  • Mobile Home Approved
  • 57-gallon first hour rating
  • 6-Year Warranty
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Vertex™ High Value Condensing 40 Gallon Ultra-Low NOx Natural Gas Water Heater
Energy Star
Anti-Leak
Vertex™ High Value Condensing 40 Gallon Ultra-Low NOx Natural Gas Water Heater Model HPCT-40L 120
  • ENERGY STAR® Qualified
  • High efficiency operation with up to 0.90 UEF
  • Thermal Efficiency up to 93%
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ProLine® XE 40-Gallon Power Direct Vent Natural Gas Water Heater
Energy Star
ProLine® XE 40-Gallon Power Direct Vent Natural Gas Water Heater Model GPDL-40 200
  • 74-gallon first hour rating
  • 6-Year Warranty
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ProLine® XE 40-Gallon High Efficiency Flue Damper Tall Natural Gas Water Heater
ProLine® XE 40-Gallon High Efficiency Flue Damper Tall Natural Gas Water Heater Model GCF-40 100
  • 70-gallon first hour rating
  • 6-Year Warranty
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ProLine® XE 40-Gallon Ultra-Low NOx Power Direct Vent Natural Gas Water Heater
ProLine® XE 40-Gallon Ultra-Low NOx Power Direct Vent Natural Gas Water Heater Model GPDNL-40 100
  • 75-gallon first hour rating
  • 6-Year Warranty
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ProLine® XE 40-Gallon High Efficiency Flue Damper Short Natural Gas Water Heater
ProLine® XE 40-Gallon High Efficiency Flue Damper Short Natural Gas Water Heater Model GCFL-40 100
  • 65-gallon first hour rating
  • 6-Year Warranty
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ProLine® XE 40-Gallon Power Vent Natural Gas Water Heater
ProLine® XE 40-Gallon Power Vent Natural Gas Water Heater Model GPVT-40L 200
  • 87-gallon first hour rating
  • 6-Year Warranty
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ProLine® XE 40-Gallon Power Direct Vent Natural Gas Water Heater
ProLine® XE 40-Gallon Power Direct Vent Natural Gas Water Heater Model GPDL-40L 300
  • 74-gallon first hour rating
  • 6-Year Warranty
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ProLine® XE 40-Gallon Ultra-Low NOx Power Vent Natural Gas Water Heater
ProLine® XE 40-Gallon Ultra-Low NOx Power Vent Natural Gas Water Heater Model GPVNT-40 100
  • 42,000 BTU input
  • 91-gallon first hour rating
  • 6-Year Warranty
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ProLine® XE 40-Gallon Ultra-Low Nox Atmospheric Vent Natural Gas Water Heater
ProLine® XE 40-Gallon Ultra-Low Nox Atmospheric Vent Natural Gas Water Heater Model GUF-40 100
  • 68-gallon first hour rating
  • 6-Year Warranty
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ProLine® XE 40-Gallon Power Vent Natural Gas Water Heater
ProLine® XE 40-Gallon Power Vent Natural Gas Water Heater Model GPVL-40 200
  • 73-gallon first hour rating
  • 6-Year Warranty
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ProLine® XE 40-Gallon Power Direct Vent Natural Gas Water Heater
ProLine® XE 40-Gallon Power Direct Vent Natural Gas Water Heater Model GPDL-40 300
  • 74-gallon first hour rating
  • 6-Year Warranty
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ProLine® XE 40-Gallon Power Vent Natural Gas Water Heater
ProLine® XE 40-Gallon Power Vent Natural Gas Water Heater Model GPVT-40 200
  • 87-gallon first hour rating
  • 6-Year Warranty
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