MELONFARM 4" Air Filtration Kit with Built-in 14cm Fan — 12-Speed Controller, Low-Noise Carbon Filter

MELONFARM's 4" Air Filtration Kit is a compact inline carbon filter system with a built-in 14cm fan and 12-speed controller designed to remove odors and improve airflow in grow tents and small indoor gardening spaces.

This all-in-one kit combines a premium activated carbon filter, an integrated low-noise fan, a pre-filter and ducting to give a ready-to-install ventilation solution for hydroponic cabinets, compact grow tents, utility rooms and kitchens. The carbon media uses Australian virgin charcoal for strong adsorption performance, while the galvanized housing and reinforced flange keep the unit sturdy and leak-resistant. Included accessories simplify setup so you can get effective ventilation and odor control quickly without sourcing separate components.

How does the MELONFARM kit reduce odors and airborne chemicals?

The core odor control comes from high-grade Australian virgin activated charcoal with a reported IAV of 1200+, providing a large adsorption surface to trap odor molecules and volatile compounds. The filter media sits inside a double-sided hexagonal galvanized steel mesh that increases open area and maintains airflow through the carbon bed, while a removable pre-filter captures dust and larger particulates to protect the carbon and extend service life.

• Premium Australian virgin charcoal for strong adsorption.
• Hexagonal galvanized mesh increases airflow and filter efficiency.
• Removable pre-filter blocks ~99% of large particles to prolong carbon life.
• Durable flange and base reduce carbon leakage and maintain a sealed path.

Will the built-in fan provide enough airflow for a small tent or cabinet?

The integrated 14cm (approximately 4") fan is tuned for compact ventilation tasks, delivering up to 265 CFM in open conditions to move air, manage heat and help control humidity in small grow spaces. The fan’s low-noise design and included deflector focus airflow and reduce turbulent losses so the system can exhaust or intake air efficiently without excessive sound.

• Built-in fan rated up to 265 CFM for small- to medium-volume ventilation.
• Low-noise operation suitable for indoor use near living areas.
• Deflector attachment concentrates airflow for improved duct performance.
• Can be configured as intake or exhaust depending on setup needs.

How easy is installation and control of airflow speed?

The kit ships ready with a 4" flange connection, an 8' length of flexible ducting and a 12-speed controller to fine-tune airflow. The heavy-duty flange and precise fit help prevent carbon dust escape and simplify attachment to standard duct or tent ports, while the controller allows gradual adjustments to match tent size, fan load and noise preferences.

• Includes 4" flange, 8-foot ducting and mounting hardware for quick setup.
• 12-speed controller for precise airflow and noise management.
• Robust flange and base minimize leakage and simplify sealing to ducts.
• Pre-filter and hangers included for tool-free maintenance and positioning.

Who is this for? The MELONFARM 4" Air Filtration Kit is intended for hobby growers, compact hydroponic setups, and homeowners who need a compact, effective way to control smells and circulate air in small enclosed spaces. It suits grow-tent operators, closet growers, utility rooms, bathrooms and kitchens that require discreet ventilation and odor management without installing separate fan and filter components. If you need an integrated, easy-to-install solution with adjustable airflow and replaceable pre-filter protection, this kit provides a balanced mix of performance, durability and convenience.