Ecopure Water Softener, 42,000 Grain Demand Regeneration Unit, Highly Efficient With Predictive Technology That Learns Your Water Usage, Regenerates Only When Needed, Free Technical Support, Space Saving Compact Design, Reduces 11-PPM Of Iron, Household Size 1 To 5 People, 1 Year Parts & Labor Warranty, 3 Year Electronics Warranty & 10 Year Tank Warranty.