Herrin is a city in Williamson County, Illinois, United States. The population was 12,501 at the 2010 census. It is home to Country Music star David Lee Murphy, the hometown of baseball's Cleveland shortstop Ray Chapman, and the hometown of San Diego State University men's basketball coach Steve Fisher, as well as Medal of Honor recipient Joseph William Ozbourn.
The water heater dimensions for these are: 25 5/8 inches for height, 13 7/8 inches for width, and a depth of 9 7/8 inches. There are also other dimensions that are available if you like.
That does not equate to the water heater needing to be elevated 18 inches above the floor. I have an electric water heater in my garage. The lowest potential source of ignition is 10 inches above the bottom of the unit. The unit itself only needs to be elevated 8 inches to to meet the 18 inch requirement.