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Need a stronger
booster fan?

 
Click here to see our
M-Series metal high
pressure fans.

Click here to see our
P-Series plastic high
pressure
fans.

Duct Booster® Fans
 
  • Boosts air flow in hard to heat or cool rooms

  • Models for ducts 6" through 14"

  • Models EF-6 through EF-14 may be used as exhaust or air intake fans

  • Easy installation in both metal and flex duct

  • Optional speed and Duct Airstat operating controls

  • Quiet, smooth operation



DB-2
DB-2

$129.95

Maximum performance, motor outside of air stream. Fits 6" or 8" rectangular or round duct.


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DBM4
DBM4 (4" Duct) $79.95
EF-6  (6" Duct)

$62.95

EF-8  (8" Duct) $89.95
EF-10  (10" Duct) $149.95
EF-12  (12" Duct) $159.95
EF-14  (14" Duct) $189.95

EF Series


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EF-AUTO Series
EF-6AUTO (6" Duct)

$159.95

EF-8AUTO (8" Duct) $189.95
 
The EF-6AUTO and EF-8AUTO Duct Booster® fans can be installed in less than 10 minutes and automatically operate in sequence with your furnace or air conditioner. Both units feature a pressure control which automatically activates the fan based on the airflow created when a furnace or central air conditioner blower turns on. The fan then runs checking to see if airflow from the furnace or air conditioner blower can still be detected every few minutes. The fan turns off when this airflow is no longer detected so it runs only when there is warm or cool air to distribute. Simply insert it into the duct run and plug it in.
 


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EF-6 and 8
  • Heavy Gauge Housing
  • Stronger Motor than the Competition
  • Better Performance, Higher Velocity (works against higher pressure drops)
  • Metal Prop Fan Blades--Means a Truer Air Flow (EF-8)
  • Higher Temperature Rating (150°)
  • Quieter, (Lower RPM, Same Performance)
  • Rated for Heated and Cooled Air

*EF-6AUTO and EF-8AUTO fans include a power cord and a built-in control for automatic operation.

EF-10, 12 & 14

  • Heavy Gauge Housing
  • 3.3” Motor with Cooling Fan
  • Extended Motor Life Compared to C Frame Motors
  • Better Performance, Higher Velocity (works against higher pressure drops)
  • Metal Prop Fan Blades--Means a Truer Air Flow
  • Higher Temperature Rating (150°)
  • Quieter, (Lower RPM, Same Performance)
  • Rated for Heated and Cooled Air
Selection Table
   

DUCT LENGTH IN FEET

Model
Motor Specifications
25 Feet
CFM
50 Feet
CFM
75 Feet
CFM
Free Air
CFM
DB-2, 6" Duct 
DB-2, 8" Duct
120V      1/70 HP  .51A
150
250
100
220
95
180
200
275
EF-6
120V      30 Watt   .40A
150
100
90
180
EF-8
120V      56 Watt    1.1A
300
250
200
325
EF-10
120V      1/100 HP  .46A
400
325
275
475
EF-12
120V     1/35 HP    1.25A
800
700
600
875
EF-14
 120V     1/25 HP     1.70A
1100
1000
900
1200
  1. Table is based on straight metal duct.  90 Degree elbows are equivalent to 10 feet of straight duct. Performance based on 70 degrees F. standard air.
  2. The DB-2 can be installed in round ducts 5" to 8", rectangular ducts as shallow as 3 1/4".
  3. The number after EF-matches the duct diameter.  Example EF-8 connects to 8" round duct.


Literature | Specifications (EF-Series, DB-2) | Instructions (EF- Series, EF-Auto Series, DB-2)


Duct Booster® Register Booster Fans

Make hot or cold rooms more comfortable!

Tjernlund’s Duct Booster® Register Booster Fans increase air flow to rooms that are too hot or too cold. These all metal high velocity register fans increase weak air flow from registers quickly and easily.



Line Voltage Thermostat Pressure Switches Dampers
     
Skytech 1315g Wireless Remote Control
Speed Control Power Cord Wireless Remote Control 
 
 

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