kevin_freidt  | 

Yes, some contractors start with distilled water and add glycol, or a boiler water treatment product. Not sure how you would add "beneficial" ions. The HYDROFILL demineralizer simplifies, and reduces the cost of, the process of filling a hydronic system because it uses whatever "contaminated" free site water is available. That way, you don't have to purchase and then transport special fill water to the site.