High capacity, high efficiency, V-style air filter in all plastic enclosing frame designed for installation in built-up filter banks, rooftops, split systems, free-standing units, package systems and air handlers. The present filter is a second-generation with improved performance resulting in the lowest Life-Cycle Cost (LCC) filter available. Fine fiber ensures that the filter will maintain its efficiency throughout its life in the system. It also has the lowest initial pressure drop of any ASHRAE grade high-efficiency air filter.