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Home > Tjernlund Ventilation > Tjernlund Duct Booster Fans > Duct Booster Fan Tjernlund DB2

Duct Booster Fan Tjernlund DB2

Duct Booster Fan Tjernlund DB2
Duct Booster Fan Tjernlund DB2Duct Booster Fan Tjernlund DB2
Item #TJE DB2
AvailabilityUsually ships in 10 business days
Sale Price$165.00


Duct Booster Fan Tjernlund Model DB2

The DB-2 DUCT BOOSTER is designed to increase the flow of heated air in warm air heating systems, or cooled air in central air conditioning systems. Its size and design limits its use to branch ducts serving individual rooms, not the main supply or “truck line” duct. The DUCT BOOSTER can be mounted on round or flat ducts. It is frequently installed on a warm air duct of a gravity warm air furnace to provide heating for a basement area. Duct Booster Fans can be installed in existing supply ducts to boost air flow into hard-to-heat or cool rooms or they are the efficient, economical way to exhaust unwanted heat, humidity, odors or other air-borne contaminates.


  • For boosting air flow in heating or air conditioning ducts, or for powered ambient air intake or exhaust
  • Easy installation in both round and rectangular ducts. Can be installed in a section of metal duct and spliced into a section of flex duct
  • Installs in round metal ducts from 5” - 8” diameter or rectangular ducts as shallow as 3 1/4”
  • Maximum ambient room temp. 100° F
  • Maximum duct air temp. 200° F
  • Rated for heated and cooled air
  • Heavy gauge housing
  • Stronger motor than the competition
  • Download the Owner's Manual

Learn 4 Facts in 60 Seconds about this Duct Booster Fan



Duct Booster Fan
Outdoor Air Supply
Lunchroom Exhaust
Spot Ventilation
Soldering/Welding Exhaust
Bathroom Exhaust
Warehouse/Pole Barn Exhaust

Duct Booster Fan
Outdoor Air Supply
Bathroom Exhaust
Spot Ventilation
Crawl Space Exhaust


Duct Length in Feet

Maximum Air Temp Degrees F

Duct Diameter Free Air CFM 25 Feet CFM 50 feet CFM 75 Feet CFM
6" Duct 200 150 100 95


8" Duct 275 250 220 180

Table is based on straight metal duct. 90 degree elbows are equivalent to 10 feet of straight duct. Performance is based on 70 degrees F standard air.

Electrical Data:

  • Volts: 120
  • Amps: .51
  • Watts: 40
  • Phase: 1
  • Hertz: 60
  • Drip proof: Non ventilated
  • Therm. Protection: Imp.

Warranty:  One year

Question: What is the RPMspeed of the motor?
Answer: The Duct Booster Fan model DB2 is 1,550 RPM’s.
Question: How loud is this fan?
Answer: The manufacturer did not test the noise level rating on the DB2 Duct Booster. However, since the fan is remotely mounted in the attic you shouldn’t hear any fan noise in the living space.
Duct Booster Fan Tjernlund DB2
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