What is a Johnson Air Rotation® System?



Heating



Specifications for Heating

Heating Unit Features

Heating Efficiency Comparison



Cooling



Specifications for Cooling

Cooling Unit Features

Cooling Efficiency Comparison



Heating & Cooling

Specifications

Unit Features

Efficiency Comparison



Johnson Air Rotation® 
Optional Features



Industry-Specific Applications

 Cooling Unit Features

Johnson Air Rotation® cooling units are constructed of heavy gauge, painted galvanized panels and structural steel. The units can handle cooling capacities up to 550 tons and air volumes up to 200,000 CFM. The direct expansion or chilled water cooling coils operate in a "draw-through" design. A variety of filtration levels are possible, with standard being 30% efficient pleated filters.

Units are wired at the factory for a single point connection. All units are UL® listed and feature a one-year parts warranty.

Optional features include outdoor construction; aluminum mesh, pleated and oil mist filters; evaporative cooling systems; night set-back clock; chillers and condensing units; stainless steel construction for food-grade and similar applications; and more.

Fact Sheet
Cooling Unit Features

Standard Features
  • Cooling capacities up to 500 tons
  • Heating capacities up to 7,000,000 BTU’s
  • Air volumes up to 200,000 CFM
  • Heavy, 18-gauge, painted galvanized panels
  • Structural steel frame construction
  • Direct expansion or chilled water cooling coils
  • Cooling coils operate in a “draw-through” design.
  • A variety of filtration levels are possible, with standard being 30% efficient pleated filters
  • Stainless steel triple pitched condensate drain pan with a single drain
  • Galvanized steel walkway plank for easy maintenance of coils, fans and motors
  • Coils and filters are mounted at floor level for easy maintenance and cleaning.
  • Adjustable horizontal and vertical discharge louvers and turning vanes for air distribution control
  • Insulated cabinet
  • Wired at factory for single-point hook-up
  • Occupied thermostat
  • Rear fan failure light (double fan units only)
  • Non-fused motor disconnect switch; motor starter and overload protection
  • Key-lock power and control panels (NEMA 1)
  • Long lasting paint finish; hinged access door
  • UL listed; 1 year parts warranty
  • Factory tested for operation and sound in a UL?-approved Test Data Program
Available Optional Features
  • Outdoor construction
  • Aluminum mesh, pleated and oil mist filters
  • Evaporative cooling systems
  • Night set-back clock
  • Sound reduction package
  • Seismic certifications
  • Ultra-violet light for bacterial elimination
  • Make-up air assemblies, make-up air on/off switch
  • Make-up air damper potentiometer; motorized inlet dampers
  • Unoccupied thermostat
  • Access platforms
  • Chillers; condensing units
  • Field startup supervision by factory technician
  • Rigging and installing supervision
  • Stainless steel construction for food-grade and similar applications
  • Extended warranty
Cooling Unit Benefits

1. Most Efficient System in the Industry
  • Neutral or positive pressure system – Maintains the conditioned air in the space
  • Reduced system tonnage due to Air Rotation® effect by continuous cooling of cooler room air versus much hotter outside air
  • Highly efficient fans utilized lower motor horsepower
  • Maintenance of the Johnson Air Rotation® System is easy and inexpensive at floor level compared to the high cost of maintaining roof top equipment during hot summers or cold winters
  • One Air Rotation® System can usually support many times the cooling capacity of one roof-top unit
2. Provides Extremely Uniform Temperature
  • Temperatures in space vary no more than +/- 1 degree
  • Eliminates associated air stratification
  • Eliminates drafts and cold or hot spots in the space
  • Controlled temperatures and humidity levels for product requirements
3. Long Equipment Life
  • Heavy duty construction
  • Minimal service intervals
  • Easy to maintain
  • Side access door and walkway plank for easy maintenance of coils, fans and motors
  • Filters at floor level are easy to maintain and replace
  • 30+ year projected unit life
  • Stainless steel IAQ style drain pan
4. Low Installation Cost
  • Fewer units per area – One unit can condition up to 200,000 ft2
  • No cranes or helicopters
  • No roof penetrations , roof loading or roof structural supports
  • No duct work required
  • Single point electrical connection
  • No bracing required for equipment
  • Units are “portable” – If you move, the unit can be used in your new facility
  • 3 men can erect an Air Rotation® unit in _ day
  • Multiple coil circulating options available, with our without piping packages
5. Engineering Support and Customer Service
  • Our experienced Application Engineers will design the optimum system for your building, saving you money and time.
  • Since we have a variety of products to offer, we can advise the best way to condition your building.
  • Start-up service technicians ensure perfect operation.
  • 83 years of combined applications experience in buildings like yours.
  • Applications can be offered with a total performance and satisfaction guaranty.
  • Billions of square feet of experience with distribution and manufacturing facilities and warehouses
6. Safety
  • UL?-listed and approved.
  • Manufactured and tested in a UL? Test Data Program.