You read about both and it sounds like why am I carrying those bags of salt? Be careful do your research completely. Do not stop at what you want to hear. First let’s explain how they work.
A softener that uses salt has an ion exchange process. This means as the water passes through the resin one calcium ion is exchanged for one sodium. The calcium sticks to the resin bead and does not enter your plumbing coming into your house. When the resin beads are coated in calcium and can no longer hold any more calcium the unit goes into regeneration. This is when the unit pulls the brine water into the water softener. The brine water makes it to where the calcium lets go of the resin bead and is washed down the drain beside the softener. The calcium has never entered the house beyond the softener. The resin beads are clean and should be able to go about a week before this process happens again usually in the middle of the night around 2 A.M. The water that enters the fixtures in your house is soft water, usually ranging from zero to two grains per gallon hard.
A salt less system first is not a water softener. It is a water conditioner. It conditions the water, so the calcium and magnesium will not stick to your pipes. It will help protect the plumbing in your house. The plumbing referring to your pipes. So, you must understand the calcium is coming into your house. If your water is seventeen grains hard at your house, the water coming out of your fixtures is seventeen grains hard. The water coming into your house is not soft, it is hard water. The calcium is in the water droplets and when they dry the white calcium is on the shower doors, the dishes in dishwasher, your hair and your laundry. The reviews on these units are so good. If you lived where the water is only six to eight grains hard you might be able to write a descent review for it.
But we live in San Antonio where we have some of the hardest water in the United States. Many areas of San Antonio are above twenty grains per gallon hard. Ten grains per gallon is considered hard water, fourteen is extreme, so San Antonio is off the chart.