KOOLTRONIC Guardian/GuardianX Series Indoor/Outdoor Filter Fans provide the security of NEMA 4 or 4X Ratings together with the versatility of indoor or outdoor use. Guardian Series Filter Fans provide a NEMA 4 Rating, while the GuardianX Series with a NEMA 4X Rating, come with a stainless steel shell. Products dissipate high heat loads economically, while two models are available, with airflows from 90 to 290 CFM (Fan airflow without filter).
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