www.tjernlund.com • 800.255.4208
Duct Booster
®
Fans
• Boost air flow in hard to
heat or cool rooms
• Model DB-2 features motor
outside of air stream
• Easy installation in both
metal and flex duct
(EF-Series only)
• Optional speed and Duct
Airstat operating controls
• Quiet, smooth operation
Your best value for
boosting air flow
in ducts or for
powered air intakes
and exhausts
Applications:
Commercial
• Duct Booster Fan
• Outdoor Air Supply
• Lunchroom Exhaust
• Spot Ventilation
• Soldering/Welding
Exhaust
• Bathroom Exhaust
• Warehouse/Pole
Barn Exhaust
Residential
• Duct Booster Fan
• Outdoor Air Supply
• Bathroom Exhaust
• Spot Ventilation
• Crawl Space Exhaust
Electrical and Performance Data:
Dimensions:
Duct Length in Feet
Model
DB-2, 6" Duct
DB-2, 8" Duct
EA-5
EF-6
EF-8
EF-10
EF-12
EF-14
Motor
Specifications
50 Feet
CFM
75 Feet
CFM
Free Air
CFM
Maximum
Air Temp
Degrees F
120V
120V
120V
120V
120V
120V
120V
1/70 HP
30 Watt
30 Watt
56 Watt
1/100 HP
1/25 HP
1/15 HP
.51A
.40A
.40A
1.10A
.60A
1.30A
2.17A
150
250
150
150
300
400
800
1100
100
220
100
100
250
325
700
1000
95
180
90
90
200
275
600
900
200
275
180
180
325
475
875
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 model DB-2 can be installed in round ducts up
to 8", rectangular ducts as shallow as 3 1/4".
3. The model EA-5 can be installed in either round
or rectangular ducts 6" or larger.
4. The number after EF- matches the round duct
diameter. Example: The EF-8 connects to 8"
round duct.
5. For complete performance specifications, consult
factory or www.tjernlund.com.
EF-Series
Model EA-5
Model DB-2
Model
EF-Series Unit Dimensions (In.)
A
6 1/2
9
15 3/4
15 3/4
15 3/4
EF-6
EF-8
EF-10
EF-12
EF-14
B
6
8
10
12
14
C
1 5/8
1 5/8
1 5/8
1 5/8
1 5/8
D
4 3/8
4 3/8
4 3/8
4 3/8
4 3/8
E
2 5/8
2 5/8
2 5/8
2 5/8
2 5/8
200
0
F
150
0
F
150
0
F
150
0
F
150
0
F
150
0
F
150
0
F
25 Feet
CFM
