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A. O. Smith 100 Gallon BTR Commercial Gas 400,000 BTU Water Heater

Water Heater Description

A. O. Smith 100 Gallon BTR Commercial Gas 400,000 BTU Water Heater

A. O. Smith 100 Gallon BTR Commercial Gas Master-Fit® 400,000 BTU Water Heater features a factory-installed draft diverter and automatic flue damper. The Master-Fit® BTR series provides outstanding performance and maximum flexibility for both new construction and replacements.

  • The ELIMINATO™ self-cleaning system
  • Three water connection options for added flexibility
  • Permaglas® Ultra Coat™ glass lining

A. O. Smith Master-Fit® 100 Gallon BTR Commercial Gas 400,000 BTU Water Heater. Meets or exceeds the thermal efficiency and/or standby loss requirements of the U.S. Department of Energy and current edition of ASHRAE/IESNA 90.1. Electronic Ignition. CSA Certified and ASME Rated T&P Relief Valve. Handhole Cleanout. Factory-installed, CSA certified and ASME rated t&p relief valve.

Manufacturer SKU: BTR-400

Manufacturer PDF: AOSCG10300.pdf

Water Heater Warranty

Waterheaters.com will honor all warranties in accordance with manufacturer policies and procedures. Manufacturer warranty issues should be addresses directly with the manufacturer.

3 Year Limited Tank Warranty

Water Heater Specifications


A. O. Smith


Natural Gas


Tank (whole house)

Tank Capacity (gallons)


BTU Input (british thermal units)


Ignition Type

Intermittent Spark Ignition

Energy Star



Why Choose Us

Local Service on Long Island, NY for both Residential & Commercial water heaters.

For every water heater installed, Waterheaters.com donates 100 meals to children through Island Harvest.

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