Commercial HVAC Installations By Air Products Inc. Air Products Inc. is a premier Los Angeles area commercial HVAC contractor, specialized in commercial HVAC equipment, maintenance & design build services. A properly designed HVAC system makes the difference between ideal performance, system life and efficient operation. A poorly designed system can drastically reduce running efficiency which will cost you substantially. Click on the links below to see some of the Southern California commercial customers that have relied on us for reliable air conditioning and heating!