General Specifications

Outside UnitJohnson Air-Rotation Systems General Specifications

One Johnson Air-Rotation System Capacity

  • 150,000 square feet conditioned with a single system
  • Up to 6,250 MBH per heating system
  • Up to 450 tons per cooling system (cooling and humidity control)
  • Up to 170,000 CFM per system

Air-Rotation System Cooling Sources

  • DX
  • Chilled Water/Glycol
  • Evaporative Cooling
  • Ammonia

Air-Rotation System Heating Sources

  • Natural Gas
  • Propane
  • #2 Oil or Dual Fuel
  • Steam
  • Hot water
  • Electric coil


  • Heavy 18-gauge painted galvanized panels for product longevity
  • Structural steel welded frame construction
  • Direct expansion or chilled water cooling coils
  • Variety of filtration levels, with 30% pleated filters standard
  • Stainless steel triple pitch condensate drain pan with nozzle
  • Galvanized steel walkway plank for easy maintenance of coils, fans and motors
  • Ground mounted coils and filters for easy maintenance and cleaning
  • Adjustable horizontal and vertical discharge louvers and turning vanes for maximum air distribution control
  • Insulated cabinet
  • Wiring in-factory for single-point connection
  • Occupied Thermostat
  • Rear-fan failure light (double fan systems only)
  • Non-fused motor disconnect switch, motor starter and overload protection
  • Key-lock power and control panels (NEMA 1)
  • Long lasting paint finish and hinged access door
  • The ONLY UL listed Air-Rotation/air turnover system on the market
  • 1 year parts warranty
  • Stringent factory test for operation and sound in a UL-approved test data program