Guardian Series KNP355FL NEMA 4 or NEMA 4XIndoor/Outdoor Filter Fans

The Guardian Series KNP355FL is a NEMA 4 or NEMA 4X rated filter fan designed to deliver reliable indoor and outdoor performance in demanding industrial environments. Its robust construction and integrated sealing gasket maintain NEMA 4 or 4X protection ratings when used with the provided filter, ensuring consistent operation even in wet, dusty, or contaminated conditions.

The unit features a heavy-duty steel shell with a baked powder finish in ANSI 61 gray, with custom color options available to match facility requirements or branding standards. For applications requiring enhanced corrosion resistance, NEMA 4X models are available with stainless steel construction, ideal for chemical processing, coastal installations, or other hostile environments where moisture and chemical combinations pose corrosion risks. The integrated fan guards provide built-in safety protection, while secure mounting hardware allows quick installation in virtually any orientation.

The KNP355FL incorporates UL shielded ball bearing motors for reliable, low-maintenance operation under continuous duty. IP55 filter protection prevents moisture and airborne contaminants from compromising motor performance, while the washable, reusable filter reduces long-term operational costs and service downtime. Each unit comes with a six-foot minimum 3-wire power cord for convenient installation. The Guardian Series KNP355FL is UL/CUL Listed (pending) and represents Kooltronic's commitment to delivering durable, fully compliant cooling solutions for the harshest industrial applications.