The pleated media is reinforced on the air‑exit side with a sturdy layer of recycled expanded metal, securely bonded using a heat‑cured adhesive to preserve pleat integrity. This galvanized metal backing resists rust and corrosion, while the pleated element is firmly attached to the inner edges of the surrounding frame. The encasing frame is constructed from a durable, moisture‑resistant beverage board that includes post‑consumer materials for added sustainability. Its face is laminated to the pleat tips for stability, and the filters are engineered to perform in environments up to 180°F
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