What is the Defender Safety System^®/FVIR?

The Defender Safety System^® is the name of Bradford White’s exclusive flammable vapor ignition resistant (FVIR) system. It is a proven feature in many of our residential gas water heaters that resists the ignition of flammable vapors outside of the water heater. The Defender System^® gives you the peace of mind knowing you have not only reliable performance but safer operation, too.