Guardian Series KNP225FL NEMA 4 or NEMA 4XIndoor/Outdoor Filter Fans

The Guardian Series KNP225FL is a NEMA 4 or NEMA 4X filter fan designed for reliable indoor and outdoor air filtration in demanding industrial environments. This robust unit features a heavy-duty steel shell with a baked powder finish in ANSI 61 gray, protecting against standard corrosion and weathering, while stainless steel construction is available for NEMA 4X models to withstand highly corrosive or chemically aggressive atmospheres where moisture and chemical combinations pose significant durability challenges.

The integrated fan guard and sealing gasket work together to maintain the specified NEMA rating when used with the provided filter, ensuring consistent environmental protection and system integrity. The IP55 filtration rating provides excellent protection against dust and moisture ingress, while the washable, reusable filter minimizes replacement costs and downtime. A six-foot minimum three-wire power cord is included for convenient installation, and the secure mounting design accommodates a range of installation orientations.

The KNP225FL is equipped with UL-shielded ball bearing motors that deliver dependable performance across extended operating cycles. The unit carries full UL/CUL listing, confirming compliance with established safety and performance standards for applications requiring regulatory documentation and approval.