How can I calculate the return on my investment?

Calculate this. You won’t have to buy or lug expensive bottled water. You’ll use less soaps, shampoos, detergents and household cleaners. Clothes will look brighter, whiter and wear better. And because most mineral deposits are filtered out, your expensive appliances will last longer. Best of all, your family’s overall quality of life will be improved – something you can’t really put a price on.