In order for a water heater to be safely installed in a garage, what is the minimum clearance requirement?

For a water heater to be safely installed in a garage, the minimum clearance requirement is 18 inches from the floor to ensure that the burner compartment is elevated above potential flood levels and to protect it from any flammable vapors that may accumulate in the garage. This elevation is especially important in garages, where gasoline and other flammable substances might be present and could pose a fire hazard if they come into contact with the ignition source of the water heater.

The 18-inch requirement is a common safety standard aimed at preventing the ignition of flammable vapors, enhancing safety in residential settings, and ensuring compliance with local codes. The codes are developed based on industry best practices and are designed to minimize risks associated with water heaters installed in areas where flammable materials may be stored.