Tjernlund DB-2


Inline Duct Booster, 7 In. L, Sleeve

DB-2 48121
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Inline Duct Booster, 7 In. L, Sleeve


ItemInline Duct Booster
Housing MaterialGalvanized Steel
Fits Duct Dia.5 to 8"
Max. Amps0.51
Max. Wattage40
Number of Speeds1
CFM @ 0.000-In. SP275
CFM @ 0.400-In. SP220
CFM @ 0.450-In. SP180
CFM @ 0.500-In. SP100
Max. Inlet Temp.200 Degrees F
Inlet and Outlet Dia.5 to 8"
Motor RPM1550
Motor EnclosureTotally Enclosed
Bearing TypeDouilles
Speed ControlYes
Mounting PositionHorizontal
Standards UL Listed
Includes Mounting Template
UPC 080956401007
Weight 7.100000


Inline Duct Booster, Housing Material Galvanized Steel, Fits Duct Dia. 5 to 8 In., Voltage 115, Max. Amps 0.51, Max. Wattage 40, Number of Speeds 1Length 7 In.CFM @ 0.000-In. SP 275Max. Inlet Temp. 200 Degrees F, Inlet and Outlet Dia. 5 to 8 In., 60 Hz, 1 PhaseMotor RPM 1550, Motor Enclosure Totally Enclosed, Width 9-1/2 In., Height 8-3/4 In.Speed Control YesMounting Position HorizontalIncludes Mounting Template

  • Note: cfm rating is for 8" dia. pipe. Air flow will decrease slightly with smaller pipe.

In-Line Centrifugal Fan Duct Booster
  • Booster fits in round, square, or flat ducts as shallow as 3-1/4" deep. One 4" x 7" cutout is required. Unit attaches to ductwork with 4 sheet metal screws. May be actuated by 5C968 pressure switch. Steel housing and wheel. 1/70 HP, 1550 rpm, 115V, 60 Hz permanently lubricated motor is positioned out of the air stream.
  • UL Listed.
  • Max. operating air temp.: 200 F; not for use with combustion exhaust Motor shaft should remain horizontal to the floor; mount on bottom of horizontal or side of vertical duct

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