Laundry Benefits In washing machines, softened water can reduce detergent use by 50% and save energy by making it possible to wash in cold (60ºF) rather than hot (100ºF) water. Cold water washes with softened water achieved the same or better results when it came to removing stains and whitening fabrics. Since less chemicals and lower temperatures(less energy) are used, fabrics last longer and less lint in the dryer.A 2009 study commissioned by the Water Quality Research Foundation (WQRF) and conducted by the Battelle Memorial Institute found that adding a water softener helps water heaters and laundry appliances operate as efficiently as possible, while preventing clogs in showerheads, faucets, and drains. For example, researchers ran washing machines for 30 days and 240 wash cycles. They ran softened water through half of the units, while using a hard water source for the others. At the end of the month, the washers using softened water were nearly free of scale buildup, but the washers using hard water required scale removal to work well.