High efficiency paint arrestance filter

A method of forming a combination filter, the method comprising:

• cutting a first layer media material;
• cutting a second layer high-efficiency particulate air (HEPA) media material;
• alternately interleaving the first layer media material and the second layer HEPA media material to form a pair of the first layer media material and the second layer HEPA media material;
• folding the pair of the first layer media material and the second layer HEPA media material with the first layer media material being arranged inside of the second layer HEPA media material;
• sealing sides of the folded pair of the first layer media material and the second layer HEPA media material;
• forming a bonded portion on at least a portion of a side face of the folded pair;
• inserting a rigid material into an open edge of the folded pair of the first layer media material and the second layer HEPA media material, thus forming a pocket assembly;
• and
• inserting a plurality of the pocket assemblies in parallel to one another into a header assembly, the bonded portion to reduce a likelihood of adjacent ones of the plurality of the pocket assemblies touching one another.