Air compressors come in all shapes and sizes but choosing the correct compressor for the application is essential to get the desired outcome.

There are two main types of air compressor, piston or rotary vein. Piston compressors are generally used for smaller applications such as in garages for paint spraying, tyre inflation and pneumatic power tools. They are also used in domestic settings when an air compressor is required. Most DIY compressors are piston compressors. Rotary vein air compressors on the other hand are used in engineering settings and can be very high output.

There are three main things to consider when choosing the right compressor. The first is the air pressure that is needed for the application usually measured in bars or psi. The second and possibly most important is the air volume required usually measured in cubic metres per minute. If this is insufficient for the equipment being used the air pressure could drop to an unusable level. Lastly, it is important to check whether the compressed air that is being used needs to be clean and dry such as in dentistry or whether it can contain small particles of oil and water. Dryers and oil separators can be added to an air compressor system to clean and dry the air before it reaches the application.