AC Infinity RAXIAL S4 Inline Booster Duct Fan
The AC Infinity RAXIAL S4 inline booster duct fan is a compact 4-inch solution for increasing airflow in ductwork, grow tents, and indoor gardens, ideal as both a duct booster fan and inline fan for grow tent intake. A die-cast unibody housing, balanced steel blades, and dual ball bearings (rated for 67,000 hours) provide smooth, low-vibration operation, pushing up to 106 CFM at just 15 W and a quiet 28 dBA.
4-Inch Inline Fan for Grow Tents and Hydroponics
Perfect for hydroponic rooms and grow tents, this 4-inch inline duct fan helps pull fresh, cool air into your space to control heat and humidity and improve plant health and CO₂ exchange. The included speed controller lets growers dial in airflow for seedlings, veg, or bloom, while the slim cylinder mounts horizontally or vertically in tight spaces—best used as a booster fan on open or lightly restricted ducts rather than on high static pressure setups or carbon filters.
Key features:
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Targeted grow tent airflow: 4-inch inline booster duct fan delivers up to 106 CFM, improving intake or transfer air to maintain stable conditions across the canopy.
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Better temperature and humidity control: Increases fresh air exchange in grow tents and hydroponic rooms, helping reduce heat from lights and manage humidity buildup.
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Adjustable airflow for each growth stage: Inline speed controller lets you fine-tune fan speed for delicate seedlings, vigorous veg, or high-demand flowering plants.
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Quiet operation in indoor grow spaces: Low-vibration die-cast housing and balanced steel blades keep noise around 28 dBA, ideal for discreet home grows.
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Durable, low-maintenance design: Permanently lubricated dual-ball bearings and a 67,000-hour lifespan mean reliable, long-term use without constant servicing.
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Slim, flexible mounting in tight tents: Compact cylinder body mounts horizontally or vertically in 4" duct runs, perfect as a booster on long duct lines from your primary inline fan or HVAC (not recommended directly on carbon filters or very high static pressure systems).
| Component | Specification | Value |
|---|---|---|
| Controller | Total Dimensions | 2.95 x 1.49 x 1.18 in. (7.5 x 3.8 x 3.0 cm) |
| Controller | Required Mounting Area | 1.49 x 1.18 in. (3.8 x 3.0 cm) |
| Controller | Hole-to-Hole Distance | 1.88 in. (4.8 cm) |
| Controller | Screw Hole Size | Ø 0.197 in. (Ø 0.5 cm) |
| Fan Unit | Duct Size | 4" |
| Fan Unit | Total Dimensions | 7.48 x 11.89 x 6.93 in. (19.0 x 30.2 x 17.6 cm) |
| Fan Unit | Mounting Hole-To-Hole Distance | 3.15 x 2.36 in. (8.0 x 6.0 cm) |
| Fan Unit | Screw Hole Size | Ø 0.197 in. (Ø 0.5 cm) |
| Fan Unit | Cord Length to Controller | 72 in. (6 feet) |
| Fan Unit | Cord Length to Plug | 72 in. (6 feet) |
| Fan Unit | Maximum Airflow | 106 CFM |
| Fan Unit | Total Noise | 28 dBA |
| Fan Unit | Static Pressure | 4.90 mm-H20 |
| Fan Unit | Operating Voltage | 110V-120V AC |
| Fan Unit | Power | 15 W |
| Fan Unit | Current | 0.15 A |
| Fan Unit | Operating Humidity | 35 to 85% RH |
| Fan Unit | Operating Temperature | 40 to 140 °F |
| Fan Unit | Fan Bearings | Dual Ball Bearing |
| Fan Unit | Mounting Positions | Horizontal or Vertical |
| Fan Unit | L10 Life Expectancy | 67,000 Hours |