4 Inline HEPA Filter Box for 4 Ducts

Elevate your indoor air quality with the KKOIUGQK 4-inch Inline Filter Box, a precision-engineered solution for advanced air purification. This unit features a robust three-layer filtration system designed to capture fine pollutants efficiently. The process begins with a pre-filter that traps larger debris, followed by a specialized HEPA layer that captures 99% of PM2.5 particles. Finally, an activated carbon layer infused with silver ion photocatalyst technology effectively absorbs odors, formaldehyde, and industrial gases, ensuring that the air circulating through your system is significantly cleaner and fresher.

Built for durability and ease of integration, this filter box is constructed from a durable iron housing with a corrosion-resistant finish, making it suitable for demanding ventilation environments. It is specifically compatible with 4-inch inline duct fans and supports an airflow capacity ranging from 59 to 147 CFM. The initial resistance is maintained between 30 and 70 Pa, balancing effective filtration with minimal impact on system performance. The unit measures 11.81″ × 7.87″ × 7.87″, allowing for straightforward installation in various configurations.

Installation is simplified with included mounting brackets that support ceiling, wall, or freestanding setups, facilitating convenient integration into existing ductwork. This system is ideal for HVAC applications, fresh air ventilation, grow rooms, basements, garages, and workshops. To maintain optimal performance, filter replacement is recommended every 3 to 6 months under normal conditions, or monthly in harsh weather environments. By improving air quality, this filter box helps protect respiratory health in both residential and commercial spaces.