AC Infinity Refillable Carbon Filter Kit | with Charcoal Refill | 4-Inch

Quick Spec: 4" Duct Opening | 11.81 x 7.04 in. (30.0 x 17.9 cm) | 210 CFM Maximum Airflow | 38mm Carbon Thickness | Australian Virgin RC412 | 1200+ IAV Carbon Grade | SKU: AC-RCF4

Precision Atmospheric Control. Zero Replacement Cycles.

Every operator running a sealed cultivation environment knows the quiet drain of a filtration system that works against the schedule: carbon beds that saturate unpredictably, flanges that seal inconsistently, and a procurement cycle that forces full-unit replacement when only the media is spent. The result is unplanned downtime, compounding consumable costs, and an atmospheric control layer that introduces variance instead of eliminating it. Standard carbon filters are a single-use liability dressed as infrastructure — and every replacement cycle is a cost center that compounds across every room, every run, every season.

After deployment, the picture changes. The scrubbing layer becomes a permanent fixture in the duct system — not a rotating consumable. Refill intervals are operator-controlled, not dictated by a disposal schedule. The carbon bed is recharged in place, tool-free, with factory-grade compression achieved through the expanded chamber design. Atmospheric integrity is maintained continuously, procurement is reduced to media-only sourcing, and the operational overhead of filter management drops to a fraction of what single-use systems demand.

The mechanism behind that outcome is the iF Award-winning patented refillable architecture. The filter body is constructed with rust-resistant galvanized steel mesh in a gunmetal sandblasted finish, paired with aluminum flanges and a secure rubber seal assembly. The flanges are reversible and twist off without tools, exposing the expanded internal chamber — engineered to achieve factory carbon compression without mechanical assistance. The carbon media itself is Australian Virgin RC412, graded at 1200+ IAV with a 38mm bed thickness and enhanced surface area for elevated adsorption rates. Multiple mesh layers work in concert to maintain corrosion resistance in high-humidity environments, and the reversible flange orientation extends charcoal bedding lifespan beyond a single fill cycle. In practical terms, the AC-RCF4 delivers lab-tested odor blocking at up to 210 CFM across a 4" duct interface with a 38mm RC412 carbon bed rated at 1200+ IAV.

Where This Belongs (and Doesn't)

The AC-RCF4 is a passive filtration component. It does not generate airflow independently. Proper function requires pairing with a compatible 4" inline duct fan rated within the 210 CFM maximum airflow envelope. Duct system design, static pressure load, and fan selection are the operator's responsibility. This unit does not replace active air handling, HVAC, or CO2 management systems.

How It Works

The AC-RCF4 operates on a refillable chamber architecture that separates the filter body — a permanent structural asset — from the carbon media, which is the only consumable component. The outer shell is constructed from rust-resistant galvanized steel mesh with a sandblasted gunmetal finish. The dual-layer mesh construction provides structural rigidity while maintaining airflow permeability across the 210 CFM rated envelope. The aluminum flanges, each fitted with a secure rubber seal, are reversible and designed to twist off without tools. This tool-free access is not incidental — it is the operational core of the refillable system, enabling in-place media replacement without removing the filter body from the duct run.

Inside the expanded chamber, Australian Virgin RC412 carbon is loaded to a 38mm bed thickness. The RC412 grade is rated at 1200+ IAV (Iodine Adsorption Value), a standard measure of activated carbon's adsorption capacity — higher IAV indicates greater surface area available for molecular capture. The expanded chamber geometry is engineered to achieve factory-grade carbon compression without mechanical pressing, which is the condition required to replicate the odor-blocking performance of standard sealed filters. This is not a claim — it is a lab-tested outcome confirmed by the manufacturer. The charcoal media itself carries enhanced surface area characteristics and an elevated adsorption rate relative to standard-grade carbon. Multiple internal mesh layers work together to distribute airflow evenly through the carbon bed while maintaining resistance to rust and corrosion in high-humidity operating environments.

Lifespan extension is built into the flange design. When one side of the carbon bed approaches saturation, the operator reverses the flanges — redirecting airflow through the less-saturated portion of the bed — effectively extending the active service life of a single refill before replacement is required. When the media is spent, the used charcoal can be composted, and a new refill is loaded using the included funnel and scoop set. The kit ships with one charcoal refill included. Additional refills are available for purchase separately at a fraction of the cost of a full replacement filter unit. In practical terms, the AC-RCF4 delivers continuous, lab-tested odor scrubbing at up to 210 CFM through a 38mm RC412 carbon bed with 1200+ IAV adsorption capacity, in a 11.81 x 7.04 in. (30.0 x 17.9 cm) form factor with a 1.57 in. (4.0 cm) aluminum flange assembly.

System Integration

• Fan Pairing: Designed for direct integration with 4" inline duct fans — connect via standard 4" ducting to the fan intake or exhaust port. Fan must be rated within the 210 CFM maximum airflow specification of the filter.
• Duct Interface: 4" duct opening with a 1.57 in. (4.0 cm) aluminum flange and rubber seal assembly. Reversible flange orientation allows installation in either airflow direction and supports lifespan extension through flange reversal mid-cycle.
• Atmospheric Control Stack: Functions as the odor scrubbing layer within a broader atmospheric control ecosystem — pairs with inline fans, speed controllers, and environmental monitors for a complete air management circuit.
• Refill Supply Chain: Additional RC412 charcoal refills are available for purchase separately. The refill-only procurement model eliminates full-unit replacement from the consumables budget.
• Waste Stream Integration: Spent charcoal media is compostable, supporting facilities with organic waste diversion protocols.

Operator Field Notes

• Flange Reversal Protocol: When odor control performance begins to decline, reverse the flanges before initiating a full refill — this redirects airflow through the less-saturated carbon zone and extends the active service interval of the current charge.
• Compression Is Achieved by the Chamber, Not the Operator: The expanded chamber geometry is engineered to produce factory-grade carbon compression passively. Do not attempt to manually compress or pack the carbon bed beyond the fill line — overfilling will restrict airflow and reduce adsorption efficiency.
• Humidity Environments: The galvanized steel mesh and multi-layer construction are specified for high-humidity operation. However, standing water or direct liquid contact with the filter body is outside the design envelope — maintain standard condensation management in the duct run.
• Refill Sourcing: Only RC412-grade Australian virgin charcoal refills are validated for this unit. Third-party carbon media of unknown grade or particle size may not achieve factory compression or rated adsorption performance in the expanded chamber.
• Spent Media Disposal: Used RC412 charcoal is compostable. Coordinate with your facility's organic waste stream protocol before disposal. Do not landfill if composting infrastructure is available.
• Fan Sizing: The 210 CFM maximum airflow rating is a ceiling, not a target. Pair with a fan sized to the actual static pressure and room volume requirements of the space — oversized fans pushing beyond the filter's rated airflow will reduce contact time with the carbon bed and degrade odor removal efficiency.

Operator FAQ

Shipping & Logistics

• Shipping Territory: Cannafull Spectrum Solutions ships within the contiguous 48 United States only. Orders to Alaska, Hawaii, U.S. territories, or international destinations cannot be fulfilled through this channel.
• Fulfillment: Orders are processed and shipped from authorized distribution points. Estimated transit times are provided at checkout based on destination. Freight class and carrier selection are determined by order weight and destination zone.
• Returns: Returns are accepted for defective or damaged units in accordance with Cannafull Spectrum Solutions' Return Policy. Non-defective returns are subject to review. Review full terms at cannafullspec.com/pages/return-policy before ordering.
• Restocking Fee: Returns of non-defective items are subject to a restocking fee of up to 25% per our Return Policy. Review full terms at cannafullspec.com/pages/return-policy before ordering.

Questions about shipping, lead times, or fleet orders? Contact Cannafull Spectrum Solutions directly before placing your order.

What's in the Box

• 1x AC Infinity Refillable Carbon Filter 4" — filter body with reversible aluminum flanges and rubber seal assembly (SKU: AC-RCF4)
• 1x RC412 Australian Virgin Charcoal Refill (included with kit)
• 1x Funnel and Scoop Set for tool-free media loading

Note: Kit contents confirmed from manufacturer source data. Weight of filter unit and refill are not specified in available source data. Additional RC412 charcoal refills are available for separate purchase. Packaging materials and documentation not listed above are not confirmed in source data and are excluded from this manifest.

Regional Compliance & Deployment Notes

• Jurisdiction: The AC-RCF4 is available for sale and shipment within the contiguous 48 United States only. Cannafull Spectrum Solutions does not ship to Canadian provinces, U.S. territories, or international destinations.
• Regulatory Classification: The AC-RCF4 is a passive mechanical filtration component — activated carbon odor scrubber. It does not carry electrical ratings, UL listings, or ETL certifications, as no electrical components are present in this unit.
• Facility Compliance: Operators are responsible for confirming that atmospheric control equipment, including carbon filtration, meets the requirements of their applicable state or local licensing authority. Cannafull Spectrum Solutions does not provide regulatory compliance consulting.
• Waste Disposal: Spent RC412 charcoal media is compostable. Operators in jurisdictions with organic waste diversion mandates should confirm composting eligibility with their local waste management authority. The filter body (galvanized steel, aluminum) is recyclable through standard metal recycling streams.
• Authorized Distribution: Units sold through Cannafull Spectrum Solutions are sourced through factory-authorized distribution channels and are eligible for manufacturer support. Cannafull Spectrum Solutions does not sell gray-market or parallel-import units.

Compliance requirements for controlled-environment cultivation facilities vary by state, county, and licensing authority. The information provided on this page reflects product specifications and general operational guidance only. It does not constitute legal, regulatory, or compliance advice. Operators should consult their licensing authority and legal counsel for jurisdiction-specific requirements. Specifications subject to change by the manufacturer without notice — confirm current specifications with Cannafull Spectrum Solutions before finalizing procurement decisions.