Description
Tjernlund EF-6 Inline Duct Fan for 6″ Flex/Metal Duct
The Tjernlund Products EF-6 is a reliable inline duct fan engineered to boost and balance airflow through 6-inch flexible or rigid metal duct systems. Designed for residential and light-commercial HVAC applications, this duct booster fan is ideal for improving comfort in rooms that suffer from inadequate heating or cooling due to long duct runs, excessive bends, or undersized ductwork.
Key Features
- Designed specifically for 6″ flexible and rigid metal duct installations
- Inline installation fits seamlessly into existing duct runs
- Boosts airflow to under-conditioned rooms and spaces
- Quiet motor operation for minimal noise disruption
- Compact, low-profile housing for easy installation in tight spaces
- Durable construction built to withstand continuous HVAC operation
- Compatible with both supply and return duct configurations
Applications
- Residential heating and cooling systems
- Rooms with long or restrictive duct runs
- Supplemental airflow in additions, basements, or bonus rooms
- Light-commercial ventilation and air distribution
Why Choose Tjernlund?
Tjernlund Products has been a trusted name in HVAC ventilation for decades, delivering dependable fans and blowers engineered for performance and longevity. The EF-6 continues that tradition, offering a straightforward solution to airflow imbalance without the need for costly ductwork modifications.
Installation Notes
- Fits 6″ diameter flexible or metal duct
- Inline mounting — installs directly into the duct run
- Refer to manufacturer documentation for wiring and airflow direction requirements







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