What is the tank starting temperature in degrees Fahrenheit? (1-500 degrees)
What is the desired heatup time in hours? (0-24 hours)
What is the output temperature of the boiler in degrees Fahrenheit? (1-500 degrees)
What is the total system temperature drop in degrees Fahrenheit? (1-100 degrees)
What is the final tank temperature required? (1-500 degrees)
What is the length of tank in inches? (1-1000 inches)
What is the width of tank in inches? (1-1000 inches)
What is the depth of tank in inches? (1-1000 inches)

Results shown below

Heatup Load = B.T.U. per hour
Surface Loss = B.T.U. per hour
Sidewall Loss = B.T.U. per hour
The total load for this tank at the above input is B.T.U. per hour
Heating Surface= square feet
Flow = GPM
Gallons in tank at full capacity =