| air circulation | Luftzirkulation |
| air circulator | Ventilator |
| air classification | Windsichten |
| air classifier | Luftstromsichter |
| air cleaner | Luftfilter |
| air cleaners | Luftfilter |
| air cleaning | Luftreinigung |
| air cock | Entlüftungshahn |
| air column | Luftsäule |
| air combat | Luftkampf |
| air combat fighter , ACF | Jagdflugzeug |
| air combat mission , ACM | Luftkampfeinsatz |
| air combat missions , ACM | Luftkampfeinsätze |
| Air Comet | Air Comet |
| air command | Luftkommando |
| Air Command and Control System | Führungssystem Luftstreitkräfte |
| Air Commodore | Brigadegeneral |
| air compartment | Wetterturm |
| air compartments | Wettertürme |
| air compression | Luftverdichtung |
| air compressor | Luftkompressor |
| air compressors | Druckluftkompressoren |
| air concentration | Luftkonzentration |
| air cond | Luftkonditionierer |
| air condition, AC | Klimaanlage |
| air conditioner | Klimaanlage |
| air conditioners | Klimageräte |
| air conditioning | Klima |
| air conditioning cell | Klimazelle |
| air conditioning cells | Klimazellen |
| air conditioning center | Klimazentrale |
| air conditioning centre | Klimazentrale |
| air conditioning compressor | Klimakompressor |
| air conditioning condenser | Klimaanlagen-Kondensator |
| air conditioning control | Klimaregelung |
| air conditioning engineering | Klimatechnik |
| air conditioning equipment | Luftkonditionierungssystem |
| air conditioning plant | Luftkonditionierungssystem |
| air conditioning room unit | Klimaschrank zur Raumklimatisierung |
| air conditioning room units | Klimaschränke zur Raumklimatisierung |
| air conditioning system | Luftkonditionierer |
| air conditioning unit | Klimagerät |
| air conditioning unit , ACU | Klimagerät |
| air conditioning units | Klimageräte |
| air conditioning, climate control | Klimaanlage |
| air conditionings | Klimaanlagen |
| air conditions | Klimaanlagen |
| air conducting sheet | Luftablenkblech |
| air conducting sheet, airflow sheet | Luftablenkblech |
| air conduction | Luftleitung |
| air connection | Luftanschluß |
| air consumption | Luftverbrauch |
| air contaminant | Luftschadstoff |
| air contamination | Luftverschmutzung |
| air control | pneumatische Steuerung |
| air control team | Fliegerleittrupp |
| air control teams | Fliegerleittrupps |
| air control teams network | Fliegerleitnetz |
| air control valve | Abblaseschubventil |
| air control valves | Abblaseschubventile |
| air conveyance | Luftführung |
| air conveyor | Luftförderer |
| air cooled | luftgekühlt |
