A fuel-burning water heater is being installed in a residential garage. The burners and ignition devices must be located at least 18 inches above the floor unless which of the following conditions is met?

• Unless the garage has a dedicated ventilation system.
• Unless the water heater is installed on a raised platform.
• Unless the unit is listed as Flammable Vapor Ignition Resistant (FVIR).
• Unless the water heater is protected by a bollard.