Bradford White Defender Safety System®, 50 Gallon Tall Residential Gas (Natural) Atmospheric Vent Water Heater. 6-Year Tank Warranty, 40,000 BTU/Hr. The "-264" indicates that this SKU comes with an Aluminum Anode Rod.
Energy Source: Gas; Fuel Type: Natural Gas
Vent Category I
Input: 40000 BTU/Hr
Output: 40000 BTU/Hr
Turndown Ratio: On/Off
Nitrogen Oxide Emissions (NOx): No, it does not comply with jurisdictions having 10ng/J NOx Regulations