Life-cycle costing of air filtration

According to the authors, there is a way to increase levels of filter efficiency while reducing the expense of the upgrade. The objective is to define the lowest cost system and not the lowest price system : to determine the best filter for the best cost. The 3 major components to life-cycle costing formula are initial investment and maintenance (that can easily be computed), energy consumption and disposal (that are more complicated to analyze). Examples are given.