Understand the option
Softening is different from filtration
A conventional ion-exchange softener exchanges hardness minerals—primarily calcium and magnesium—for sodium or potassium ions. Its main purpose is controlling mineral scale and improving soap performance. It is not a disinfectant, carbon filter, or universal contaminant-removal device. “Salt-free softener” is often marketing shorthand for conditioning technologies that may alter scale behavior but do not remove hardness by ion exchange. Proposals should state whether the device actually reduces measured hardness and how performance is verified.
