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 Johnson Air Rotation® Systems We invented, patented and trademarked the Johnson Air Rotation® System-and we are experts at its application. The system heats, cools and ventilates large, open buildings such as manufacturing, distribution and warehouse facilities. The Johnson Air Rotation® System is simply the best way to condition large, open buildings because: The first cost is competitive with roof-top air handlers and the various kinds of make-up air equipment. It installs quickly and easily, requiring only three men for a half-day for a typical installation. Operating costs (fuel and electricity) are a fraction of the cost of other HVAC equipment. It lasts 30 or more years. It requires annual maintenance that takes less than one hour. To learn more, review our case studies, references and industry-specific applications.