Various companies, such as Keith Products, Meggit Control Systems and Air Comm Corporation, manufacture aircraft air conditioning systems. Some manufacturers focus on specific types of aircraft or a certain type of air conditioner.
Most aircraft air conditioner manufacturers provide a variety of temperature control products, which not limited to cooling systems. For example, Keith Products provides aircraft heating, air conditioning and ventilation systems. Meggit Control Systems manufactures core systems and outsources smaller parts manufacture. Meggit offers not only air conditioning, but heat exchangers and environmental control systems as well. Air Comm Corporation focuses solely on helicopters and provides heating systems, air conditioning and system testing.