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We offer clarity in the quest for cleaner air. AAF provides trusted products that are the result of more than 100 years of experience and innovation in commercial air filtration. Browse these categories to find advanced solutions to meet your clean air challenges.

C-3 & C-4 Crank Lock

C3 C4 Crank Lock housing

C-3 & C-4 Crank Lock

Strong, durable and long-lasting, these C-3 and C-4 Crank Lock Side Access HEPA/ULPA Filter Housings are designed for use with a variety of HEPA filters. Each door allows access to up to four filters and prefilters for quick changeout.

C-3 & C-4 Crank Lock

Strong, durable and long-lasting, these C-3 and C-4 Crank Lock Side Access HEPA/ULPA Filter Housings are designed for use with a variety of HEPA filters. Each door allows access to up to four filters and prefilters for quick changeout.

Features
  • Stainless steel filter locking mechanism for strength, durability and long-term integrity
  • Access for up to four filters and prefilters wide per door for quick filter changeout
  • Double pin hinges; doors make level contact with the door gasket for a uniformly tight seal
  • Can hold either gasket-seal (C-3) or gel-seal (C-4) filters 
  • Galvanized steel or stainless steel construction available

Industry Applications

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