The NuvoH2O line of softeners are whole home salt free water softeners that utilizes a proprietary citrus formula, CitraCharge, to bind hard water minerals and reduce pH, rendering hard minerals incapable of forming scale. Unlike salt-based softeners, NuvoH2O not only prevents hard water build-up, it also removes existing scale. The Manor Softener System is ideal for homes with 4 - 7 full time resident lasting 50,000 gallons or approx. 4-5 months.