Guardian Series KNP36FL NEMA 4 or NEMA 4XIndoor/Outdoor Filter Fans

The Guardian Series KNP36FL is a NEMA 4 or NEMA 4X indoor/outdoor filter fan engineered to deliver reliable air filtration and circulation in demanding industrial environments. Its robust construction and comprehensive sealing make it ideal for applications requiring protection against dust, moisture, and challenging weather conditions while maintaining stringent ingress protection standards.

The unit features a heavy-duty steel shell with baked powder finish in ANSI 61 gray, with stainless steel construction available for NEMA 4X models to combat corrosive atmospheres and hostile environments where chemical and moisture combinations present ongoing degradation risks. The integrated sealing gasket and IP55 filter protection work in concert to maintain full NEMA 4 or 4X ratings throughout the equipment's operational life. Integrated fan guards provide safe, tamper-resistant operation, while secure mounting provisions ensure stable installation in any orientation. A six-foot, three-wire power cord rated for 1.8 meters simplifies field installation.

Powered by UL/CSA Recognized ball-bearing motors available in permanent split capacitor or shaded pole configurations, the KNP36FL delivers exceptional reliability with automatic-reset thermal overload protection and low temperature rise design. Kooltronic's proprietary motor cooling by intake air maximizes motor longevity, while special permanent lubricants ensure operation across an extreme temperature range from minus 20F to 250F. The washable, reusable filter reduces long-term operating costs and maintenance downtime. All units are UL/CUL Listed and carry a Declaration of Conformity to applicable CE Standards. Custom color powder coat options are available to meet specific aesthetic or identification requirements.