Small commercial buildings tend to be one to four stories, but the main distinction is that they use packaged equipment. A packaged air conditioner is a cooling system that is completely assembled in a factory rather than on the site. An example of a small commercial building might be a shopping mall, which contains several rooftop air conditioning units that all have individual thermostat controls, compared to a system that has one central cooling system that must be put together on the site.
-James Braun
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