CO2 Softener (5-year warranty), includes: a Solucalc 1-inch meter, 1 bottle of CO2, various adaptation fittings, labor, and travel costs provided there is a nearby power outlet. Drinking water: Keep 100% drinking water throughout the house, the Solucalc uses food-grade CO2. Salt-free: The SoluCalc only uses CO2 (+ - €25 for a family of 4), so no more salt bags. An economical softener: The SoluCalc is designed to operate without salt, no maintenance (normally + - €100) and without regeneration (no more water waste, no need for discharge). Significant savings to be made. References: Ikea, Kinepolis, Thomas & Piron, Federation Wallonie-Bruxelles, etc.