Specifications include, but are not limited to: Air Conditioning Units, Portable (For Computer Rooms, Hospital Rooms, Sporting Events, etc.) Air Conditioners: Commercial, and Parts and Accessories not Individually Itemized Air Conditioners: Controlled Environment (For Computer Rooms, etc.), and Parts and Accessories not Individually Itemized) Air Conditioners (Cooling and Cooling/Heating Types): Window and Wall Mounted, and Parts and Accessories Not Individually Itemized Air Conditioning and Heating: Central Units, and Parts and Accessories Not Individually Itemized Air Circulation Equipment (Not Otherwise Classified). Air Curtains. Air Flow Meters. Air Purifiers, Accessories and Supplies. Blowers: Industrial Types. Chillers, Heat Exchangers and Receivers. Chilled Water System, Portable. Chilled Water Meter System. Coatings and Sealants, Duct.