Our most advanced water softener maximizes resources and savings. The Culligan High-Efficiency Water Softener features Aqua-Sensors® and smart meter components and automatically adjusts to changes in your home’s water conditions. It only regenerates when needed, and gives you the chance to control and customize water softness throughout your house. The Culligan High Efficiency Water Softener is our most advanced water softener. It produces cleaner water for your family and pets and can help prolong the lifespan and efficiency of your appliances, heating and plumbing systems.