Solve draft problems caused by design issues, cold starts or unusual fireplaces. The Tjernlund Rooftop Draft Inducer Gas/Oil Fuels - Large features a clamshell design for easy service, a patented auxiliary cooling fan for motor protection, backward inclined material handling impeller, speed control, an outdoor rated electrical whip and high temperature black finish.
To determine the size you need measure the length and height of your hearth opening. Multiply the length and height to determine the face area opening in square feet (divide square inches by 144 to convert to square feet). If the fireplace is open on the side or back, total all openings to arrive at the total face area.
For tile lined chimney this clamps to rectangular tile liners 8" x 8" through 12" x 14" and round tile liners from 10"-14". For metal vents it fits vent pipes as small as " in diameter and as large as 20" outer diameter.
Auto Drafter Features:
- For tile lined chimney this clamps to rectangular tile liners 6" x 6" through 10" x 14" and round tile liners from 6"-11"
- For metal vents it fits vent pipes as small as 8" in diameter and as large as 12" outer diameter
- Patented auxiliary fan-automatically turns on if gets to hot
- Adjustable 750-1500 CFM
Maintenance: The auto drafter is designed for continuous use. The motor is equipped with permanently lubricated sealed ball bearings which do not require oiling. A vent pipe inspection must be performed annually. The inspection should include checking all vent pipe and connections blockage and leaks. A safety interlock test must also be performed on the Gas/Oil Fuel models.For gas applications no regular maintenance is required. For solid fuel models inspect impeller after 3 months and set periodic inspection and cleaning as necessary.