Segmentation by type distinguishes the physical architecture of the fiberglass filter medium, each architecture delivering distinct performance attributes that influence market adoption. Woven media, formed by interlacing continuous glass fibers, provides uniform pore distribution and is favored in high‑temperature HVAC and industrial gas filtration, representing the most mature and volume‑driven type. Non‑woven media, produced by randomly depositing fibers and bonding them thermally or chemically, offers higher dust‑holding capacity and is prevalent in automotive air‑intake filters where variable particle loads are common. Needle‑punched constructions, created by mechanically interlocking fibers with barbed needles, combine structural rigidity with low airflow resistance, making them suitable for water‑treatment pre‑filters that experience fluctuating flow rates. Laminated composites, which bond a fiberglass layer to a polymer backing, enhance mechanical durability and chemical resistance, supporting niche applications such as high‑pressure industrial gas scrubbing. The relative market share of each type is dictated by cost‑performance trade‑offs, with woven and non‑woven together comprising roughly 70 % of total shipments.