Guardian Series KNP180FL NEMA 4 or NEMA 4XIndoor/Outdoor Filter Fans

The Guardian Series KNP180FL is a NEMA 4 or NEMA 4X rated filter fan designed for reliable indoor and outdoor operation in demanding industrial environments. This unit maintains its full NEMA 4 or 4X enclosure rating when used with the provided filter, ensuring robust protection against dust, moisture, and spray ingress that can compromise equipment performance and longevity.

The enclosure features a heavy-duty steel shell with a baked powder finish in ANSI 61 gray, with custom color options available to match facility aesthetics or identification requirements. NEMA 4X models are constructed from stainless steel, offering superior corrosion resistance in chemically aggressive or persistently wet conditions where standard steel would degrade. Integrated fan guards protect personnel and prevent foreign object damage, while an integrated sealing gasket maintains environmental integrity throughout the enclosure. The IP55 rated filter provides additional protection against particulate contamination while allowing efficient airflow.

Electrical and mechanical components are engineered for durability and safety. The unit arrives with a six-foot, three-wire power cord and UL/CUL Listed certification, meeting stringent safety standards for North American industrial applications. UL shielded ball bearing motors eliminate noise and vibration while extending bearing life under continuous operation. The washable, reuseable filter reduces long-term consumable costs and simplifies maintenance, while secure mounting provisions ensure stable installation in any orientation. This combination of robust construction, environmental sealing, and quality motor design makes the KNP180FL ideal for facilities that cannot tolerate equipment downtime due to moisture or corrosion-related failures.