Hurricane Inline Fan – 4 Inch 171 CFM

The Hurricane Inline Fan (4 Inch, 171 CFM) is a commercial-grade ventilation fan built for grow rooms, tents, and controlled-environment setups where consistent, quiet airflow is critical. The steel housing with powder-coated finish and UL-listed components make it a durable, reliable choice for exhausting heat and humidity or supplying fresh air through 4-inch ducting.

Hurricane Inline Fan 4 Inch Specifications

The specifications below are drawn from the manufacturer product data and canonical supplier listing for SKU HCN736570.

Specification	Value
Brand	Hurricane
SKU	HCN736570
Duct Diameter	4 inch
Airflow	171 CFM
Voltage	120V AC
Power Cord Length	8 ft
Housing Material	Steel with powder-coated finish
Weight	9.36 lb (4.25 kg)
Certifications	UL-listed components
Includes	Mounting brackets and installation instructions

Why Choose the Hurricane Inline Fan 4 Inch

Growers looking for a straightforward, dependable 4-inch inline fan will find the Hurricane delivers on the basics without unnecessary complexity. Here is what distinguishes it from generic alternatives:

• Commercial-grade steel housing. The fan body is fabricated from steel and finished with a powder-coat rather than molded plastic, giving it better resistance to the warm, humid conditions inside a grow tent or enclosed room over a long operating life.
• UL-listed components. The internal motor and electrical components carry UL listing, which matters when the fan runs continuously for weeks or months in an enclosed environment. It is a practical indicator of baseline electrical safety.
• Quiet operation. The fan is described by the manufacturer as designed for quiet operation, which is relevant in residential or mixed-use buildings where noise from mechanical equipment is a concern.
• Ready to install out of the box. Mounting brackets and step-by-step instructions are included in the box. No additional hardware is required to hang the fan from a frame or ceiling brace, and the 8-foot power cord reaches most outlets without an extension.
• 171 CFM output in a 4-inch footprint. At 171 CFM, this fan provides adequate airflow for moderately sized grow spaces through standard 4-inch ducting, matching the diameter used by most 4-inch carbon filters and flex duct products on the market.

Best Uses for the Hurricane Inline Fan 4 Inch

This fan fits naturally into a range of indoor growing and ventilation scenarios where 4-inch ducting is already in place or planned:

• Grow tent exhaust. Mounting the fan at the top exhaust port of a grow tent draws out heat that accumulates near the canopy, helping maintain the temperature range plants need. The 171 CFM rating is appropriate for tents in the 2×4 ft to 4×4 ft range depending on heat load.
• Carbon filter odor control. The fan pairs directly with 4-inch carbon filters — the manufacturer specifically recommends use with Phresh and Black Ops carbon filters — pulling air through the filter media before exhausting it outside the growing area. This is one of the most common inline fan applications.
• Fresh air intake. Inline fans can be run in reverse or configured as a dedicated intake to pull filtered outdoor air into a sealed room. The steel housing handles the mechanical stress of continuous intake duty as well as exhaust.
• Supplemental room ventilation. In larger rooms where the primary HVAC system does not circulate air evenly, a small inline fan running through a short duct run can address hot spots or stagnant zones without requiring major infrastructure changes. Pair it with an oscillating floor fan for broader air distribution across the canopy.
• Controlled-environment agriculture (CEA) facilities. Commercial-grade construction makes this fan suitable for small commercial CEA installations — seedling rooms, propagation chambers, or utility rooms — where consumer fans would wear out under continuous operation.

Hurricane Inline Fan vs Similar Products

The 4-inch inline fan category includes options at several price and build-quality tiers. Understanding where the Hurricane sits helps you decide whether it fits your setup.

Steel vs plastic housing. Many 4-inch inline fans at lower price points use ABS plastic housings. The Hurricane’s steel housing is heavier (9.36 lb vs roughly 3–5 lb for typical plastic models) but also more rigid under the vibration loads that develop during continuous operation. In grow rooms that run 18–24 hours per day, housing flex can contribute to mounting fatigue over time.

UL listing. Not all inline fans sold for horticultural use carry formal UL listing on their electrical components. The Hurricane’s UL-listed components are a practical consideration for growers in jurisdictions where electrical compliance matters, or for commercial operators whose facilities may be inspected.

CFM output. At 171 CFM, this fan sits mid-range for the 4-inch category. Fans at the lower end of the category typically deliver 100–140 CFM; higher-end variable-speed 4-inch units can reach 200+ CFM. If your grow space regularly runs hot or you are pulling air through a longer duct run with bends, a higher-CFM unit or a variable-speed controller (such as those made by Titan Controls, which the manufacturer lists as compatible) may give you more flexibility.

Included hardware. The Hurricane ships with mounting brackets and instructions, which some competing fans at a similar price point do not include. This reduces the out-of-pocket cost and setup time for first-time installers.

Compatibility

The Hurricane Inline Fan is designed around the 4-inch standard duct diameter, which is the most common size for grow tent ports, flexible ducting, and inline carbon filters in the home and small commercial growing segment. The following products and product types are compatible based on manufacturer guidance and the standard 4-inch interface:

• Carbon filters (4-inch flange). The manufacturer lists Phresh and Black Ops carbon filters as recommended companions. Both brands produce 4-inch carbon filters with standard flanges that mate directly to the fan inlet or outlet. If you need a pre-filter to extend carbon filter life, the Air Box 4 Pre-Filter is sized for this duct diameter.
• Ducting and clamps (4-inch). Ideal-Air 4-inch ducting and duct clamps are recommended by the manufacturer for connecting the fan to carbon filters, intake ports, or exhaust runs. Standard 4-inch flexible aluminum or insulated flex duct from any manufacturer will also mate correctly.
• Ventilation controllers. Titan Controls ventilation controllers are listed as compatible by the manufacturer. A controller allows you to automate fan speed or on/off cycles based on temperature or humidity readings, which is useful for maintaining stable VPD in a sealed growing environment.
• Voltage. The fan operates on standard North American 120V AC power and includes an 8-foot cord with a standard NEMA 5-15 plug. It is not rated for 240V or international voltage without a transformer.
• Condensate management. If you are running a dehumidifier in the same space and need to manage condensate drainage, the Ideal-Air Pro Series condensate pump handles the drainage side while the inline fan handles air exchange.

Usage Guidelines

Getting the most from this fan means matching its airflow output to the space it is ventilating and the resistance of the connected ductwork.

Air exchange rate. A common target for grow rooms is one complete air exchange every one to three minutes. To estimate whether 171 CFM is sufficient, calculate your room volume in cubic feet (length × width × height in feet). A 4×4×7 ft tent has a volume of 112 cubic feet; 171 CFM gives you better than one air change per minute in that space, which is adequate for most photoperiod cultivation at moderate heat loads.

Duct run length and fittings. Every bend, fitting, and foot of duct adds resistance that reduces actual CFM at the output. A straight run of a few feet will deliver close to the rated output; a long run with multiple 90-degree bends may reduce effective airflow by 20–40%. Keep duct runs as short and straight as practical, or size up to a 6-inch system if your layout requires significant duct work.

Carbon filter sizing. When pairing with a carbon filter, confirm the filter’s rated CFM capacity matches or exceeds the fan’s output. Running a fan faster than the filter is rated for reduces odor control efficiency. Most 4-inch carbon filters are rated in the 100–200 CFM range; check the filter specification before purchasing.

Speed control. This fan operates at a fixed speed without a built-in speed controller. If your grow environment has variable heat loads (e.g., high-wattage HID lighting that cycles on and off), pairing the fan with a compatible Titan Controls ventilation controller or an inline fan speed controller allows you to match airflow to actual demand and reduce noise during lights-off periods.

Noise and vibration. Steel-housed fans can transmit vibration to the mounting surface more readily than plastic fans. Using rubber vibration isolators between the fan and any hard mounting surface (frame tubing, wooden shelf bracket) will reduce transmitted noise to adjacent spaces.

How to Install the Hurricane Inline Fan 4 Inch

1. Select a mounting location. The fan should be positioned at or near the top of the grow tent or room, where heat accumulates. For exhaust, mount near the highest vent port. For intake, position near a lower port on the opposite side of the space from the exhaust to encourage cross-circulation.
2. Attach the mounting brackets. Install the included mounting brackets onto the fan body according to the enclosed instructions. The brackets can be used to hang the fan from a tent frame cross-bar or screw it to a wooden support brace.
3. Connect the carbon filter (if used). Slide one end of the 4-inch duct flange onto the carbon filter outlet, then connect the other end to the fan inlet. Secure with duct clamps. Ensure the filter is oriented so air flows through the carbon media before reaching the fan.
4. Run the exhaust duct. Attach 4-inch flexible ducting to the fan outlet and route it to the exhaust port of the tent, or to an exterior vent if exhausting outside the room. Keep bends to a minimum to preserve airflow efficiency.
5. Secure all connections. Tighten duct clamps at the fan inlet and outlet. Check that the carbon filter and any duct sections are seated fully on flanges to prevent air leaks, which reduce system efficiency and can allow odors to escape before reaching the filter.
6. Plug in and test. Plug the 8-foot power cord into a grounded 120V outlet or into a compatible ventilation controller. Power on and verify the fan is drawing air in the correct direction (intake or exhaust as intended). Check all duct joints for air leaks by feeling for airflow around fittings while the fan is running.
7. Adjust speed if using a controller. If connected to a Titan Controls or similar ventilation controller, set the target temperature or humidity threshold and confirm the fan cycles as expected. Run the system through at least one full lights-on and lights-off cycle to verify settings before leaving unattended.

Sources & Further Reading