Define the outcome
Choose ion exchange when measurable hardness removal and soft-water behavior matter. Evaluate conditioning when avoiding salt and regeneration discharge is the priority.
Respect chemistry limits
Ask for manufacturer limits for hardness, iron, manganese, pH, chlorine and peak flow.
Compare lifetime ownership
Review salt, water use, media replacement, prefiltration, warranty conditions and how performance will be verified.
Straight answers
Common questions
Will a salt-free system remove spots?+
Results vary because minerals usually remain. Require a clear written claim rather than assuming conditioning equals softening.
Does salt-free mean maintenance-free?+
No. Media, cartridges and pretreatment can require scheduled service.