What does FVIR stand for?

FVIR stands for "Flammable vapor ignition-resistant." This designation is important in the context of safety standards for water heaters, particularly in relation to the prevention of flammable vapor ignition, which is a significant concern for residential safety. FVIR technology is designed to reduce the risk of ignition from flammable vapors by incorporating features that limit the potential for such vapors to reach ignition sources.

Understanding FVIR is essential for home inspectors and professionals in the field to ensure that appliances installed in homes comply with safety regulations, particularly in areas prone to fuel vapors. The other options, while they contain components that sound plausible, do not accurately reflect the established safety standards associated with water heaters or similar equipment.