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Compact 4 inch inline duct fan with speed controller, short 4.72 body, dark finish

BFKK

BFKK 4 Inch Compact Inline Duct Fan Kit Greenhouse

SKU CH-NH1A-5T3RA

Compact inline duct fan kit with a 4.72 body and built-in speed controller for quiet, efficient ventilation in tight spaces

  • Compact 4.72-inch body fits tight spaces where standard fans cannot
  • Quiet DC motor delivers stable airflow with reduced noise and lower power consumption
  • Built-in speed controller adjusts airflow without extra accessories or apps
  • Suits grow tents, bathrooms, dryer vents and garage ventilation in one unit
  • Designed for small grow tents and cabinets to save valuable interior space

Compact 4.72 Body for Tight Spaces

This BFKK inline duct fan kit uses a shortened 4.72 body that fits where standard 4 inch fans cannot. The compact design targets small grow tents, cabinets and similar confined ventilation setups. A built-in speed controller adjusts airflow without extra accessories or apps. The DC centrifugal motor runs quietly and draws less power than bulkier traditional units.

Suits Small Enclosures and DIY Airflow

Growers with limited tent depth, cabinet builders and hobbyists needing a simple exhaust booster will find this kit practical. It also serves as a bathroom exhaust fan, dryer vent booster or garage ventilator for multi-purpose value. Buyers who need higher static pressure for long duct runs or large-volume rooms should look at larger-capacity alternatives. Installations requiring smart-home integration or automated climate curves are not supported by the manual controller.

Speed Controller and Motor Simplify Setup

The integrated speed controller removes the need for a separate dimmer or smart module, letting users dial airflow directly on the unit. The high-efficiency DC motor keeps noise low and reduces energy draw compared to conventional AC duct fans. No additional mounting hardware, ducting or filters are mentioned in the supplied facts.

Highlights

  • Compact 4.72-inch body fits tight spaces where standard fans cannot
  • Quiet DC motor delivers stable airflow with reduced noise and lower power consumption
  • Built-in speed controller adjusts airflow without extra accessories or apps
  • Suits grow tents, bathrooms, dryer vents and garage ventilation in one unit
  • Designed for small grow tents and cabinets to save valuable interior space

Specifications

No published specifications for this item yet.

Questions about this item

What duct size must I already have for this 4.72-inch body fan to connect?

The fan is a 4-inch inline model, so it fits standard 4-inch ducting and flanges you already own.

Will the built-in speed controller still let me run the fan quietly if I keep my older carbon filter attached?

Yes, the DC motor and integrated speed controller adjust airflow without extra accessories, so an existing filter adds only its normal resistance.

How can I confirm the kit is working as intended after I install it?

You will feel steady exhaust airflow at the duct exit and hear only a low hum from the DC motor when the speed controller is turned up.

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