This refillable 4-inch carbon filter kit is designed as a reusable alternative to traditional duct carbon filters. Its patented refillable chamber accepts replacement activated charcoal while maintaining lab-tested odor-blocking performance without requiring manual carbon compression. The kit includes everything needed for refilling, allowing continued use with compatible 4-inch inline duct fans and ventilation systems.
Perfect for:
Grow tents · Hydroponic rooms · Indoor ventilation · Odor filtration · 4-inch duct systems
Built to Last One Growing Season
• Refillable 4-inch carbon filter
• Patented refillable filter design
• Premium Australian virgin activated charcoal
• Expanded refill chamber
• Lab-tested odor-blocking performance
• Removable twist-off flanges
• Dual-layer galvanized steel mesh construction
• Protective rubber sealing system
Additional Benefits:
• Designed to replace charcoal instead of the entire filter
• Includes one charcoal refill for continued filtration
• One refill provides filtration capacity comparable to two standard 4-inch carbon filters
• Tool-free refilling with the included funnel and scoop
• Expanded chamber removes the need to manually compress replacement charcoal
• Reversible flanges help extend charcoal service life
• Protective coating helps resist rust and corrosion in humid growing environments
Easy 10-Minute Setup:
Attach the filter to a compatible 4-inch inline duct fan and ventilation system. When the charcoal needs replacing, remove the twist-off flanges, use the included funnel and scoop to refill the chamber, then reinstall the flanges before returning the filter to service.
What’s Included:
Refillable 4-inch carbon filter
One charcoal refill
Funnel
Scoop
Free shipping · 30-day money-back guarantee
