The Air Handler 2-ply link filters incorporate two distinct filter layers. The first layer acts as a high-porosity impingement filter and the second as a durable strainer to prevent unloading or streaming. A non-migrating tackifier between the two layers laminates assures positive filter-cake build up. This filter achieves a high level of efficiency on a wide range of particle sizes. Since there is no external support structure necessary, all of the media surface is exposed to the air stream. Filters approach or exceed the performance and service life of rigid, pleated filters, and offer the additional advantage of being linkable; the self- gasketing, friction-fit frames can often eliminate the need for extra mounting hardware. The 2-Ply filter is designed for side-access application, and can offer approximately three times the life of fiberglass disposable filters. When used as pre-filters, these filters will add substantially to the life of more expensive high efficiency filters. Its media is non-allergenic, unaffected by moisture, most corrosive chemicals, and even 100% humidity.