Replacement 6-Inch Inline Duct Booster Fan for Tjernlund M-6 Systems
Overview:
Uneven airflow can leave certain rooms too warm, too cool, or difficult to keep comfortable. This 6-inch inline duct booster fan is designed to improve airflow through HVAC ductwork, helping conditioned air reach areas that need it most.
Built as an aftermarket replacement for the Tjernlund M-6, this inline booster fan fits standard 6-inch duct applications and operates on 120V AC power. By reinforcing airflow through long duct runs and other challenging sections of your HVAC system, it helps improve overall comfort while supporting more balanced heating and cooling distribution.
Whether you're replacing a worn booster fan or restoring airflow performance, this unit offers dependable operation with straightforward installation.
Key Features:
- Direct aftermarket replacement for the Tjernlund M-6
- Fits standard 6-inch inline duct systems
- Helps improve airflow to underperforming duct runs
- Reduces hot and cold spots throughout the building
- Supports more balanced heating and cooling distribution
- Operates on 120V AC, 60 Hz power
- Delivers up to 460 CFM airflow
- Designed for continuous-duty operation
- Suitable for residential and light commercial HVAC applications
- Simple replacement for compatible existing installations
Important Information:
This is an aftermarket replacement part designed to replace the original manufacturer's component. Brand names and part numbers are used solely for compatibility and identification purposes. This product is not manufactured by, sponsored by, or affiliated with Tjernlund.
FAQs:
Q: What does this fan replace?
A: It is designed as an aftermarket replacement for the Tjernlund M-6 duct booster fan.
Q: What duct size does it fit?
A: It is designed for standard 6-inch duct systems.
Q: What voltage does this fan require?
A: It operates on 120V AC, 60 Hz power.
Q: What is the airflow rating?
A: The fan is rated for up to 460 CFM.
Q: Can this help improve uneven room temperatures?
A: Yes. By improving airflow through compatible ductwork, it can help reduce temperature differences caused by insufficient airflow.
Fit / Measuring / Safety Notes:
- Verify your existing unit is a Tjernlund M-6 or matches the listed specifications before ordering.
- Confirm your duct diameter is 6 inches.
- Verify electrical requirements match 120V AC, 60 Hz service.
- Disconnect electrical power before installation or servicing.
- Installation should comply with applicable local electrical and HVAC codes.
- Inspect ductwork for proper support and sealing during installation.
Helpful Links:
Product Details / Specifications:
- Product type: Inline duct booster fan
- Duct size: 6 inches
- Model: NBKM-6
- Voltage: 120V AC
- Frequency: 60 Hz
- Airflow: 460 CFM
- Speed: 2800 RPM
- Current Draw: 1.1A
- Insulation Class: Class B
- Thermal protector: 130°C
- Designed for inline duct installation
- Intended for residential and light commercial HVAC systems
Direct Replacement for:
- TJERNLUND M-6
Manufacturer Warranty
Warranty Coverage: 1-Year Limited Warranty
This replacement part from NBK includes a 1-year manufacturer's warranty covering defects in materials and workmanship under normal use.
If you experience an issue within the warranty period, please contact us with your order details so we can assist with evaluation and next steps. Warranty coverage does not apply to damage caused by improper installation, misuse, or external electrical issues.
Estimated Lead Time
Orders typically leave our warehouse within 2–3 business days. After your order ships, delivery time will depend on your location and the carrier's transit schedule.
Processing and shipping times may vary based on product availability and carrier service. If you have any questions about current stock or estimated delivery dates, please contact us before placing your order.
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