Light Commercial Rooftop Units


A system that works smarter

American Standard customers demand products that provide exceptional  reliability, meet stringent performance requirements, and are  competitively priced. American Standard delivers with the Precedent™  light commercial packaged systems.

Precedent features cutting edge  technologies: reliable compressors, American Standard engineered  ReliaTel™ controls and computer-aided run testing. So, whether you’re  the contractor, the engineer, or the owner you can be certain Precedent  products are built to meet your needs.

Throughout the years,  American Standard has designed and developed the most complete line of  Packaged Rooftop products available in the market today. American  Standard was the first to introduce the Micro—microelectronic unit  controls—and has continued to improve and revolutionize this design  concept.


Electromechanical controls are available for simpler  applications, and for the more sophisticated, ReliaTel microprocessor  controls.

The ReliaTel control platform offers the same great  features and functionality as the original Micro, with additional  benefits for greater application flexibility.

Precedent continues  to provide the highest standards in quality and reliability, comfort,  ease of service, and the performance of American Standard light  commercial products.

Contact Us

Gene May Heating and Cooling

74b Stone Hill Road, Oswego, Illinois 60543, United States



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