Scale is a buildup of various minerals (including calcium, lime and magnesium) that reside on boiler tubes and the base of the boiler. Scale can dramatically affect the life expectancy of your equipment and also significantly lessen the efficiency of the unit.
When scale builds up on boiler tubes, it interrupts the transfer of heat. This results in the tubes potentially overheating, cracking or in a lot of cases, bursting, which would result in an immediate shut down of the unit and quite a messy mechanical room!
Read More

