Bradford White® Defender Safety System® Gas Water Heater, 40000 Btu/hr Heating, Natural Gas, 1/2 in Gas Connection, 50 gal Tank, Pilot Ignition, Atmospheric Vent, 3 x 4 in Vent, 43 gph at 90 deg F Recovery, Energy Factor: 0.68, 3/4 in NPT Water Connection, 4 in WC, Ultra Low Nox: No, 26-1/8 in D x 63-1/2 in H, Domestic
These models feature an automatic flue damper that helps to reduce stand-by heat loss. The flue damper, combined with additional insulation and heat traps, helps these units achieve one of the highest Energy Factor (EF) ratings of our atmospheric vent models.