Strange as it may seem, some home water treatment systems use energy. The home water treatment systems that use energy in the treatment process are reverse osmosis systems and water softeners. Point-of-use water filters that attach to the kitchen sink faucet do not consume any energy.
Water softeners and reverse osmosis systems vary in their use of energy. In both types of systems, energy is used for pumping water for flushing and regeneration. The amount of energy used depends upon the system, the quality of the water being treated, and the amount of water used in the home. Be sure to request energy consumption information from the dealer before purchasing any water treatment system or water softener.