AC Infinity Inline Duct Silencer | 6-Inch

Quick Spec: 6" duct opening | 20.86 x 8.93 in. body | 3.90 lb | Galvanized steel body | Stainless steel reversible flange | Neoprene egg-crate foam | SKU: AC-DSA6 | $69.99

Precision Control in Any Space

Every ventilation circuit has a weak point — and in compact, enclosed operations, that weak point is acoustic bleed. Fan noise travels through bare duct runs, vibrates through walls, and announces the presence of your system to anyone within earshot. That constant transmission is not a minor inconvenience; it is an operational liability. Uninsulated inline connections act as megaphones, amplifying turbulence and motor harmonics through the structure. The longer the run, the worse the signal. Operators who ignore this problem do not eliminate it — they absorb it as ambient risk, shift by shift, cycle by cycle.

After the AC-DSA6 is installed, the ventilation circuit continues to move air at full rated capacity — but the acoustic signature of that airflow drops measurably. The space becomes operationally quieter. Structural noise bleed is attenuated at the source rather than managed downstream with secondary treatments. The system runs, the air moves, and the environment stays controlled without broadcasting its presence through the building envelope.

The mechanism is a galvanized steel body measuring 20.86 x 8.93 inches, lined internally with high-quality neoprene foam cut in an egg-crate pattern — a geometry specifically chosen to break up turbulent airflow and absorb acoustic energy across the frequency range generated by inline duct fans. The 1.50-inch stainless steel flanges are reversible, allowing the silencer to be positioned in either airflow direction without modification, and the corrosion-resistant construction is rated to withstand extreme temperature cycling across both intake and exhaust applications. At 3.90 pounds, the unit installs inline anywhere in the ventilation chain — between fan and ducting, at the duct exit, or at any intermediate junction — without requiring structural support modifications. In practical terms, the AC Infinity Duct Fan Silencer 6" delivers up to 50% noise reduction across a standard 6-inch ventilation circuit within a 20.86 x 8.93-inch inline footprint at a 3.90-pound installed weight.

Where This Belongs (and Doesn't)

Installation note: The AC-DSA6 is a passive acoustic attenuation component. It does not regulate airflow volume, temperature, or humidity. It must be paired with a compatible 6-inch duct fan and appropriate environmental control hardware for complete atmospheric management. Do not install in circuits carrying combustible gases or in applications requiring fire-rated duct assemblies without verifying material compatibility with your facility's mechanical engineer.

How It Works

Airflow noise in inline duct systems originates from two primary sources: turbulence generated by the fan motor and impeller, and resonance transmitted through rigid duct walls. Standard duct connections do nothing to interrupt either pathway — they simply extend the transmission medium. The AC-DSA6 inserts an acoustic break into the circuit by surrounding the airflow column with neoprene foam formed in an egg-crate pattern. The irregular surface geometry of the egg-crate profile disrupts laminar flow at the duct wall boundary, converting turbulent kinetic energy into low-level heat rather than allowing it to propagate as sound through the duct structure.

The galvanized steel outer body provides structural rigidity and corrosion resistance, ensuring the silencer maintains its geometry and acoustic performance across the temperature extremes typical of both intake circuits (which may carry ambient or conditioned air) and exhaust circuits (which carry heat-loaded air from the cultivation environment). The 1.50-inch stainless steel flanges at each end are reversible — meaning the unit has no fixed inlet or outlet orientation — which eliminates installation errors in bidirectional or reconfigured duct layouts. The 12.87-inch internal foam chamber length provides sufficient acoustic path length to achieve the rated up to 50% noise reduction without requiring a secondary silencer in standard single-fan configurations. In practical terms, the AC Infinity Duct Fan Silencer 6" delivers up to 50% airflow noise attenuation within a 20.86 x 8.93-inch galvanized steel body weighing 3.90 pounds, with reversible stainless steel flanges compatible with both intake and exhaust circuit orientations.

System Integration

• Fan Compatibility: Designed for use with AC Infinity and compatible third-party 6-inch inline duct fans; positions between fan outlet and main duct run or at any intermediate junction in the ventilation chain
• Intake and Exhaust: Reversible flange design confirms bidirectional installation — a single unit serves either circuit orientation without modification or additional hardware
• Controller Ecosystem: The AC-DSA6 is a passive component and integrates with any fan speed controller or automated environmental control system without electrical connection — acoustic performance is independent of fan speed setting
• Duct Connectivity: Standard 6-inch duct collar interface; compatible with aluminum flex duct, rigid aluminum duct, and insulated flex duct assemblies standard to enclosed cultivation and equipment room ventilation circuits
• Multi-Unit Deployment: Multiple silencers can be staged in series on long duct runs or deployed at both intake and exhaust positions simultaneously for compounded acoustic attenuation across the full ventilation circuit

Facility Integration Data

For operators managing multiple cultivation rooms or equipment closets, the AC-DSA6 scales linearly — each ventilation circuit requiring acoustic attenuation is a discrete installation point, and the per-unit cost structure supports fleet-level deployment without volume pricing complexity.

Operator Field Note

• Flange orientation does not matter: The reversible stainless steel flanges mean there is no wrong direction — install with either end facing the fan without performance penalty.
• Position matters more than quantity: Placing the silencer directly at the fan outlet — before the first duct bend — captures the highest-energy acoustic source in the circuit and delivers the greatest attenuation per unit installed.
• Egg-crate foam is not a filter: The neoprene lining is an acoustic absorber, not a particulate filter. Do not rely on it to capture dust, pollen, or debris — maintain your inline carbon filter and pre-filter assemblies independently.
• Temperature cycling is expected: The galvanized steel body and neoprene foam are rated for extreme temperature conditions. Exhaust circuits running heat-loaded air will not degrade the foam geometry or the flange seal over normal operating cycles.
• Series installation compounds attenuation: Two units staged in series on a long exhaust run will deliver greater cumulative noise reduction than a single unit, particularly in circuits where the duct run itself acts as a resonance chamber.
• Verify duct collar fit before final installation: The 6-inch nominal diameter should be confirmed against your existing duct collar — minor manufacturing tolerances across duct brands can affect slip-fit tightness. Use aluminum foil tape to seal any gap at the flange joint.

Operator FAQ

Shipping & Logistics

• Shipping Territory: Cannafull Spectrum Solutions ships within the contiguous 48 United States only. Orders outside this territory cannot be processed.
• Fulfillment: Orders are processed and shipped from authorized distribution points. Estimated transit times will be provided at checkout based on destination. Freight class and carrier selection are determined at time of shipment.
• Returns: Returns of defective units are handled per Cannafull Spectrum Solutions return policy. Contact support within the applicable return window with order number and documented defect description before initiating a return shipment.
• 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 your order? Contact Cannafull Spectrum Solutions support directly through the contact page at cannafullspec.com.

What's in the Box

• 1x AC Infinity Duct Fan Silencer 6" — galvanized steel body with neoprene egg-crate foam lining (SKU: AC-DSA6)
• Reversible stainless steel flanges (integrated, both ends)

Note: Included accessories are confirmed from available manufacturer source data. No additional hardware, duct tape, or mounting hardware is listed as included. Verify box contents against the packing slip upon receipt and contact Cannafull Spectrum Solutions support immediately if any discrepancy is identified.

Regional Compliance & Deployment Notes

• Shipping Jurisdiction: Available for shipment within the contiguous 48 United States only through Cannafull Spectrum Solutions.
• Mechanical Code Compliance: Installation of inline duct components in commercial or licensed cultivation facilities may be subject to local mechanical codes, building permit requirements, and fire-rated assembly standards. Verify applicable code requirements with your facility's licensed mechanical contractor before installation.
• Fire-Rated Assemblies: The AC-DSA6 is not listed or rated for fire-rated duct assembly applications. Do not install in circuits required to maintain fire-rated duct integrity under local building or fire codes without written confirmation of material compatibility from a licensed engineer.
• Licensed Facility Deployment: Operators in licensed cultivation facilities should confirm that inline duct modifications comply with their facility's approved ventilation plan and any applicable state or local regulatory requirements governing environmental control system modifications.
• UPC Reference: 819137021068 (AC-DSA6) — for procurement, compliance documentation, and inventory tracking purposes.

Cannafull Spectrum Solutions provides this compliance information as a general reference for licensed operators. It does not constitute legal, engineering, or regulatory advice. Consult qualified professionals for jurisdiction-specific requirements applicable to your facility and installation.