Inline Centrifugal & Mixed Flow Fans

When maximum airflow is needed, inline centrifugal fans and mixed flow inline fans do a fantastic job of delivering fresh air where it’s needed. HVACDirect.com has an unsurpassed selection of both types, supplied by the best manufacturers in the business - Soler & Polau (S&P) VENTS-US

For what they do and for all their benefits, the inline centrifugal fan and the mixed flow inline fan represent an amazing value for your investment. HVACDirect.com is committed to offering the highest quality products at the lowest prices possible. Ordering is easy, thanks to our well-trained customer service staff, and shipping is fast.

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  • VENTS-US TT Series 4" Inline Mixed Flow Fan - TT 100

    VENTS-US TT Series 4" Inline Mixed Flow Fan - TT 100

    Model: TT 100
    Low Price: $69.00
  • VENTS-US TT Series 5" Inline Mixed Flow Fan - TT 125

    VENTS-US TT Series 5" Inline Mixed Flow Fan - TT 125

    Model: TT 125
    Low Price: $89.00
  • VENTS-US TT Silent Series 4" Inline Mixed Flow Fan - TT SILENT 100

    VENTS-US TT Silent Series 4" Inline Mixed Flow Fan - TT SILENT 100

    Model: TT SILENT 100
    Low Price: $99.00
  • VENTS-US TT Pro Series 4" Inline Mixed Flow Fan - TT PRO 100

    VENTS-US TT Pro Series 4" Inline Mixed Flow Fan - TT PRO 100

    Model: TT PRO 100
    Low Price: $111.00
  • VENTS-US TT Series 6" Inline Mixed Flow Fan - TT 150

    VENTS-US TT Series 6" Inline Mixed Flow Fan - TT 150

    Model: TT 150
    Low Price: $119.00
  • VENTS-US TT Silent Series 5" Inline Mixed Flow Fan - TT SILENT 125

    VENTS-US TT Silent Series 5" Inline Mixed Flow Fan - TT SILENT 125

    Model: TT SILENT 125
    Low Price: $119.00
  • VENTS-US VK 100 Series 4" Inline Centrifugal Plastic Fan - VK 100

    VENTS-US VK 100 Series 4" Inline Centrifugal Plastic Fan - VK 100

    Model: VK 100
    Low Price: $129.00
  • VENTS-US TT Pro Series 5" Inline Mixed Flow Fan - TT PRO 125

    VENTS-US TT Pro Series 5" Inline Mixed Flow Fan - TT PRO 125

    Model: TT PRO 125
    Low Price: $133.00
  • VENTS-US VK 125 Series 5" Inline Centrifugal Plastic Fan - VK 125

    VENTS-US VK 125 Series 5" Inline Centrifugal Plastic Fan - VK 125

    Model: VK 125
    Low Price: $135.00
  • VENTS-US VK 150 Series 6" Inline Centrifugal Plastic Fan - VK 150

    VENTS-US VK 150 Series 6" Inline Centrifugal Plastic Fan - VK 150

    Model: VK 150
    Low Price: $149.00
  • VENTS-US 4" AntiRADON In-Line Centrifugal Plastic Fan - VK 100

    VENTS-US VK-AntiRADON 100 4" Plastic Radon Mitigation Fan

    Model: VK-AntiRADON100
    Low Price: $152.00
  • VENTS-US 5" AntiRADON In-Line Centrifugal Plastic Fan - VK 125

    VENTS-US VK-AntiRADON 125 5" Plastic Radon Mitigation Fan

    Model: VK-AntiRADON125
    Low Price: $158.00
  • VENTS-US 6" In-line Centrifugal Plastic Fan - VK 150 P Series

    VENTS-US VK 150 P 6" In-line Centrifugal Plastic Fan

    Model: VK150P
    Low Price: $159.00
  • VENTS-US In-line centrifugal fan VK 150 U Series with power cord built in speed and temperature control. (Plastic case)

    VENTS-US VK 150 U 6" In-line Centrifugal Plastic Fan

    Model: VK150U
    Low Price: $164.00
  • VENTS-US 6" AntiRADON In-Line Centrifugal Plastic Fan - VK 150

    VENTS-US VK-AntiRADON 150 6" Plastic Radon Mitigation Fan

    Model: VK-AntiRADON150
    Low Price: $172.00
  • VENTS-US TT Series 8" Inline Mixed Flow Fan - TT 200

    VENTS-US TT Series 8" Inline Mixed Flow Fan - TT 200

    Model: TT 200
    Low Price: $175.00
  • VENTS-US TT Pro Series 6" Inline Mixed Flow Fan - TT PRO 150

    VENTS-US TT Pro Series 6" Inline Mixed Flow Fan - TT PRO 150

    Model: TT PRO 150
    Low Price: $178.00
  • VENTS-US TT Silent M Series 4" Inline Mixed Flow Fan - TT SILENT M 100

    VENTS-US TT Silent M Series 4" Inline Mixed Flow Fan - TT SILENT M 100

    Model: TT SILENT M 100
    Low Price: $204.00
  • VENTS-US TT Silent M Series 5" Inline Mixed Flow Fan - TT SILENT M 125

    VENTS-US TT Silent M Series 5" Inline Mixed Flow Fan - TT SILENT M 125

    Model: TT SILENT M 125
    Low Price: $211.00
  • VENTS-US VK 200 Series 8" Inline Centrifugal Plastic Fan - VK 200

    VENTS-US VK 200 Series 8" Inline Centrifugal Plastic Fan - VK 200

    Model: VK 200
    Low Price: $239.00
  • VENTS-US 8" In-line Centrifugal Metal Fan - VKMs 200 Series

    VENTS-US VKMS 200 8" In-line Centrifugal Metal Fan

    Model: VKMS200
    Low Price: $239.00
  • VENTS-US 4" Dryer Booster In- Line Centrifugal Plastic Fan - VK 100 PS

    VENTS-US VK 100 PS 4" Dryer Booster Fan

    Model: VK100PS
    Low Price: $245.00
  • VENTS-US 5" Dryer Booster In- Line Centrifugal Plastic Fan - VK 125 PS

    VENTS-US VK 125 PS 5" Dryer Booster Fan

    Model: VK125PS
    Low Price: $251.00
  • VENTS-US 8" In-line Centrifugal Plastic Fan - VK 200 U Series

    VENTS-US VK 200 U 8" In-line Centrifugal Plastic Fan

    Model: VK200U
    Low Price: $254.00

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Inline Centrifugal Fans, also known as inline centrifugal duct fans, consist of an impeller in a specially designed housing. The shape of the housing imparts a radial flow of air that spirals in the same direction as the motor shaft. This flow of air can be quite strong, and even small centrifugal vent fans can make a big difference in the ventilation of a room or building.

HVACDirect.com has an impressive selection of inline centrifugal fans from VENTS-US and S&P. Some are built with corrosion-resisting materials, including a few models that are rated for corrosive air and radon gas mitigation. Centrifugal inline fans do not have to be round. Sometimes, the ductwork makes it more feasible to install a square or rectangular fan, but the airflow is still centrifugal in nature.


Mixed Flow Inline Fans create an axial flow of air, parallel to the motor’s armature, plus a radial flow. The combination of the two creates an outflow strong enough to remove heavy, allergen and moisture-laden air from a building or room in a relatively short amount of time. You could say that the mixed flow inline fans for sale by HVACDirect.com are big brothers to the vent hood fans found in kitchens and the vent fans found in bathrooms, because they work on the very same principle.

The determining factor between what would work best for your environment - centrifugal or mixed flow - depends greatly on the ductwork and the type of activity that occurs in the room or area. Mixed flow fans work best when connected to straight runs of ductwork, so if the existing ductwork has a lot of right-angle turns in it, an inline centrifugal fan might be the best choice. For rooms or areas with a lot of “heavy” air (saturated with moisture, fumes and/or allergens), a mixed flow fan might be best.

To be absolutely certain, however, check with one of our knowledgeable customer service representatives. They can answer questions and help you find the right product for your needs.

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