VIVOSUN 4" Carbon Filter for Inline Fan — 223 CFM, Silver with Detachable Pre-Filter

VIVOSUN 4" Carbon Filter with detachable pre-filter is a high-flow odor and gas adsorption unit rated for 223 CFM, built to protect indoor grow spaces, kitchens, and basements from unwanted smells and airborne contaminants.

This carbon filter pairs a deep bed of high-activity Australian virgin charcoal with a robust galvanized shell and a removable pre-filter to deliver long-lasting filtration without choking airflow. Designed to attach to 4-inch inline duct fans, the assembly supports both intake and exhaust setups and includes straps for easy mounting inside tents or duct runs. The reversible flange and base extend service life by allowing you to invert the canister for more even charcoal usage.

How does this filter reduce odors in a grow tent or room?

The filter's charcoal media adsorbs volatile compounds and odors as air passes through the thick 38 mm carbon bed. High microporosity and premium RC 412 Australian virgin charcoal increase adsorption sites for more effective capture of smells and many gaseous pollutants.

• 38 mm deep activated charcoal bed for greater contact time
• Premium RC 412 Australian virgin charcoal with high adsorption capacity
• High open-area mesh to maintain airflow while filtering

Will it restrict airflow when connected to a 4" inline fan?

The unit is engineered to maximize free area through a round-hole galvanized steel mesh so it supports up to 223 CFM without excessive backpressure. The lengthened canister allows higher filtration surface while preserving flow so fans operate efficiently.

• Rated up to 223 CFM for balanced performance
• Round-hole galvanized mesh increases open area and reduces resistance
• Compatible with standard 4" inline duct fans for intake or exhaust setups

How do I keep the filter working longer and cleaner?

The included detachable pre-filter fabric captures dust and large particles, preventing premature clogging of the charcoal bed. In addition, the reversible flange/base makes it possible to flip the canister for even charcoal wear, extending overall service life and maintaining efficiency.

• Detachable pre-filter blocks ~99% of large particles
• Reversible flange and base allow canister rotation for even use
• Simple belt straps included for secure mounting and easy removal

Is this filter suitable beyond grow rooms — like kitchens or basements?

Yes. The adsorption characteristics of the charcoal and the heavy-duty housing make the filter useful wherever odors, VOCs, or gases are concerns. While not a substitute for specialized chemical scrubbers, it is effective for typical household and indoor horticulture odor control.

• Effective on cooking smells, mildew odors, and common VOCs
• Durable galvanized steel shell for household or grow-room environments
• Easy to integrate into ventilation ducts or tent setups with included belts

Who this is for: Growers, hobbyists, and homeowners who need a compact yet powerful 4" filtration solution that balances high airflow with reliable odor and gaseous compound adsorption. Choose this VIVOSUN filter if you run a 4" inline fan and want a serviceable, mount-friendly unit with replaceable pre-filtration to maintain performance over time.