Bradford White 75 Gallon Commercial Gas (Natural) Atmospheric Vent Water Heater with Flue Damper and Electronic Ignition. 3-Year Tank Warranty, 160,000 BTU/Hr., 120 Volts, Single Phase, with Power Cord included. The -867 indicates that this SKU was designed to operate in Altitudes between 5,001 feet and 8,000 feet.