High Level Circulators


L.J. Wing High Level Circulators (HLC) draw in, and then redistribute to the floor, heat that normally would be wasted through the roof and upper walls. HLC units maintain an extremely low floor to ceiling temperature differential.The revolving discharge provides uniform air distribution projecting the air downward around structures, machinery, stacked materials or any obstacles. Air at the working level is kept gently on the move so no hot or cold spots can develop.

For more information, request bulletin HLC.


  • 14 sizes x 5 types of discharge = 70 possible unit combinations!
  • Positrack gear drive revolves the discharge at 1 RPM.
  • Captures and redistributes heat that would otherwise be wasted.
How It Works

The high torque, low rpm, rack and pinion system of the Wing revolving discharge system.

The slowly turning air distribution system of the unique LJ Wing Revolving Discharge provides a 360 degree circle of temperature coverage. This design has been in the field for over 30 years and has been proven both by CFD analysis and real life application to achieve low temperature deltas from floor to ceiling and over large floor areas.

How It Works

The LJ Wing "Positrack" drive system slowly turns the air discharge openings for broad coverage.

The "Positrack" system used by LJ Wing for over 30 years employs a large, round, rack gear that is driven by a high torque, low rpm, motor driven pinion gear. Consistent drive contact is assured by the "floating" motor/gear mounting mechanism,

How It Works

The LJ Wing High Level Circulator works by reclaiming heat from below.

The High Level Circulator (HLC) is an ideal energy saving solution for very tall buildings where processes on or near the floor generate heat that would otherwise by wasted. The HLC fan system and revolving discharge pull the process produced warm air from high in the space and redistribute it evenly back to the floor....saving the cost of operating unit heaters especially during "shoulder" seasons when less heating is required and the processes below produce enough heat for comfort conditions.