Bradford White TTW® 55 Gallon High Input Residential Gas (Natural) Power Vent Water Heater that is designed and certified for installations up to 10,100 feet out of the box. No conversion kit required. 6-Year Tank Warranty, 78,000 BTU/Hr., 120 Volts, Single Phase, with Power Cord included. The -264 indicates that this SKU comes with an Aluminum Anode Rod.