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.
Length x Width x Desired Temperature Rise x 12 = Required BTU. Example (10 x 20 ft. pool; desired temp rise of 20 degrees Fahrenheit): 10 x 20 x 20 x 12 = 48k BTU. When you are deciding what size pool heater to purchase, it is important. to understand that a larger heater will heat the water faster.