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Fantech DBF 4XLT 4 in. Dryer Duct Booster with Pressure Switch, Cord, Indicator Panel

Fantech DBF 4XLT 4 in. Dryer Duct Booster with Pressure Switch, Cord, Indicator Panel

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Model: Fantech DBF 4XLT

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Model: Fantech DBF 4XLT

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If ordered by 1PM CST M-F, ships same day. All items on your order must be in stock for same-day shipping.

The only Fantech DBF 4XLT supplement approved dryer exhaust fan available in the market today. 

  • Features an upgraded pressure sensing circuit
  • LED indicator display panel
  • Temperature limit switch 
  • If UL approval is a concern, accept no substitutes
  • For electric dryer

Dryer exhaust fan. It helps your dryer run efficiently while removing the warm and moist air from the dryer duct.


The fan should be added in the dryer duct run when the length of the run exceeds 40 ft. with no bends, 35 ft. with one bend or 30 ft. with two bends. The fan can be used to effectively maintain dryer exhaust in duct runs up to 130 linear feet.


The DBF 4XLT features a pressure switch that automatically activates the exhaust fan once the dryer is on; the wall-mounted indicator panel with a 50 ft. cable that indicates proper operation of the exhaust fan. In the event of a problem, the LED light will inform the homeowner of the nature of the problem. The fan is equipped with a 5 ft. cord with a plug for 120V/1~ power supply.


Performance certified by HVI; safety certified by ETL to UL507.

System Information
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Product Type
Exhaust Fan
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Airflow Capacity
173 CFM
Fan Speed RPM
2559 RPM
Electrical Information
72 Watts
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60 Hz
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Voltage Phase
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120 Volts
Product Dimensions
Product Weight
7.7 lbs
Important Measurements
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Duct Diameter Inches
4 inches
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