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DBF 4XLT Duct Booster Fan

4" duct booster fan, 5ft cord w/plug, wall panel, 120V, 1~

Item Number: 40275

DBF 4XLT is a duct booster fan designed for boosting air on demand. The product is equipped with 5 feet cord, indicator panel to indicate status of product operation and pressure-sensing switch that activates the fan once positive pressure is sensed in the duct line. The switch shuts the fan off when the pressure in the duct’s normalized.

The DBF 4XL features a galvanized metal housing, pressure-sensing switch, indicator panel and a 5 feet cord for 120V/1~ connection. Suitable for 4” ductwork.

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

Technical parameters

Norminal data
Voltage (nominal) 120 V
Frequency 60 Hz
Phase(s) 1~
Input power 72 W
Input current 0.73 A
Impeller speed 2,559 r.p.m.
Air flow max 173 cfm
Temperature of transported air max 140 °F
Max temperature of transported air, when speed controlled 140 °F
Enclosure class, motor IP44
Insulation class B
Dimensions and weights
Duct dimension; Circular, inlet 4 in.
Duct dimension; Circular, outlet 4 in.
Weight 7.7 lb
Duct connection type Circular
Images Dimensions - DBF 4XLT Duct Booster Fan - Fantech
Model A B C D E F G H I


9 3/4 (248)

3 3/4 (95)

3 7/8 (98)

6 15/16 (176)

3 7/8 (98)

2 (51)

1 (25)

3 (76)

2 (51)

Dimensions are in inches (mm)

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