Home / A.O. Smith Signature 300 40-Gallons Tall 12-year Warranty 40000-BTU Natural Gas Water Heater
  • A.O. Smith Signature 300 40-Gallons Tall 12-year Warranty 40000-BTU Natural Gas Water Heater
  • A.O. Smith Signature 300 40-Gallons Tall 12-year Warranty 40000-BTU Natural Gas Water Heater
  • A.O. Smith Signature 300 40-Gallons Tall 12-year Warranty 40000-BTU Natural Gas Water Heater
  • A.O. Smith Signature 300 40-Gallons Tall 12-year Warranty 40000-BTU Natural Gas Water Heater
  • A.O. Smith Signature 300 40-Gallons Tall 12-year Warranty 40000-BTU Natural Gas Water Heater
  • A.O. Smith Signature 300 40-Gallons Tall 12-year Warranty 40000-BTU Natural Gas Water Heater
  • A.O. Smith Signature 300 40-Gallons Tall 12-year Warranty 40000-BTU Natural Gas Water Heater
  • A.O. Smith Signature 300 40-Gallons Tall 12-year Warranty 40000-BTU Natural Gas Water Heater
  • A.O. Smith Signature 300 40-Gallons Tall 12-year Warranty 40000-BTU Natural Gas Water Heater
  • A.O. Smith Signature 300 40-Gallons Tall 12-year Warranty 40000-BTU Natural Gas Water Heater

A.O. Smith Signature 300 40-Gallons Tall 12-year Warranty 40000-BTU Natural Gas Water Heater

A. O. Smith’s Signature 300 Series 40-Gallon Gas Water Heater with Ultra Low NOx Atmospheric Vent provides efficient, reliable hot water for households with 3 to 4 people when sized appropriately. The environmentally friendly 40,000 BTU ultra-low nitrogen oxide (NOx) gas burner delivers 68 gallons of hot water in the first hour. An automatic flue damper increases efficiency by reducing heat loss in standby mode. The electronic gas valve provides precise temperature control for optimum hot water delivery without an external power source. The gas valve also has an LED status indicator for diagnostics reporting and easy push-button ignition startup. A. O. Smith’s natural gas 40-gallon water heater’s built-in safety system reduces the risk of accidental flammable vapor ignitions. A factory-installed temperature and pressure relief valve and tamper-proof drain valve also ensure safe operation. This model is built to last. It features Tank Guard® which is designed to proivde ultimate tank protection and increase lifespan of the water heater. This added protection comes with a 12-year limited warranty offers added peace of mind. Standard 120-volt electrical supply required (19-foot power cord included). Call 1-877-GOEhotmall to get this water heater installed.

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A. O. Smith’s Signature 300 Series 40-Gallon Gas Water Heater with Ultra Low NOx Atmospheric Vent provides efficient, reliable hot water for households with 3 to 4 people when sized appropriately. The environmentally friendly 40,000 BTU ultra-low nitrogen oxide (NOx) gas burner delivers 68 gallons of hot water in the first hour. An automatic flue damper increases efficiency by reducing heat loss in standby mode. The electronic gas valve provides precise temperature control for optimum hot water delivery without an external power source. The gas valve also has an LED status indicator for diagnostics reporting and easy push-button ignition startup. A. O. Smith’s natural gas 40-gallon water heater’s built-in safety system reduces the risk of accidental flammable vapor ignitions. A factory-installed temperature and pressure relief valve and tamper-proof drain valve also ensure safe operation. This model is built to last. It features Tank Guard® which is designed to proivde ultimate tank protection and increase lifespan of the water heater. This added protection comes with a 12-year limited warranty offers added peace of mind. Standard 120-volt electrical supply required (19-foot power cord included). Call 1-877-GOEhotmall to get this water heater installed.

  • Delivers the ideal amount of hot water for households with 3 to 4 people when sized appropriately
  • Automatic flue damper increases efficiency by automatically opening and closing to reduce heat loss in standby mode
  • Electronic gas valve provides precise temperature control for optimum hot water delivery
  • Features an environmentally friendly 40,000 BTU low NOx gas burner that delivers 68 gallons in the first hour
  • Tank Guard® provides advanced tank protection that extends the life of your gas water heater
  • Tall, slim 64.25-in H x 20-in diameter profile enables easier installation in narrow spaces
  • High-altitude certified from 0 ft to 7,700 ft.
  • Provides peace of mind with a 12-year limited tank and parts guarantee and a 3-year limited labor warranty.
  • Provides peace of mind with a 12-year limited tank and parts guarantee and a 3-year limited labor warranty..

General

  • Series Name: Signature 300
  • Type: Tank

Dimensions

  • Diameter (Inches): 20
  • Family Size: 4.0
  • Height (Inches): 64.25
  • Insulation Thickness (Inches): 2.0
  • Nominal Capacity (Gallons): 40
  • Rated Storage Capacity: 38-Gallon
  • Vent Diameter(s): 3-in
  • Water Connection Size: 3/4-in
  • Weight (lbs.): 143.0

Features

  • BTU Rating: 40000
  • Emission Rating: Ultra Low NOx
  • Foam Insulation: Yes
  • For Use with Mobile Homes: No
  • Fuel Type: Natural gas
  • GPH Recovery at 90 Degrees F (Gallons): 42
  • Grade: Residential
  • High Altitude Model: Yes
  • Ignition Type: Piezo
  • Pilot Light Window: Yes
  • Pilot Reset Button: Yes
  • Point of Use: No
  • Power Source: Gas
  • Temperature and Pressure Relief Valve: Yes
  • Uniform Energy Factor: 0.65
  • Use Location: Indoor
  • Vent Type: Type B double wall
  • Venting Type: Atmospheric
  • Water Connection Location: Top
  • Water Heater Style: Tall

Compatibility

  • Bluetooth Compatibility: No
  • Smart Compatible: No
  • Wi-Fi Compatibility: No

Warranty

  • Warranty: 12-year limited

Certifications

  • CA Residents: Prop 65 Warning(s): Yes
  • ENERGY STAR Certified: No
  • Safety Listing: CSA safety listing
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