An installer is placing a water heater in a residential garage. To protect it from vehicle impact, what is the minimum required protection, unless the water heater is installed out of the vehicle area?

• The water heater must be protected from vehicle impact.
• The water heater must be enclosed in a locked cabinet.
• The water heater must be elevated at least 18 inches above the floor.
• No specific protection is required for water heaters in garages.