This softener has a rated softener efficiency of not less than 3,350 grains of total hardness exchange per
pound of salt (based on sodium chloride) and shall not deliver more salt than its listed rating or be operated
at a sustained maximum service flow rate greater than its listed rating. This softener has been proven to
deliver soft water for at least ten continuous minutes at the rated service flow rate. The rated salt efficiency
is measured by laboratory tests described in NSF/ANSI Standard 44. These tests represent the maximum
possible efficiency that the system can achieve. Operational efficiency is the actual efficiency after the system
has been installed. It is typically less than the rated efficiency, due to individual application factors including
water hardness, water usage, and other contaminants that reduce a softener’s capacity.