If you need to use a single high powered tool, then the highest CFM of the air tool will tell you the CFM requirement in an air compressor. Whether you use an air compressor as part of regular work or use it occasionally, the CFM requirements are usually determined by the power tools you engage in your work.Īir tools typically have the recommended CFM determined by the manufacturer. High CFM rating means more air and vice versa. This will help you choose the right type of air compressor you need for your air tools.įor example, higher CFM ratings are required to operate large tools, whereas smaller ones such as a nail gun work fine with low CFM ratings. All these tools require different CFM ratings to operate, and it is imperative to have a thorough understanding of CFM if you’re planning to buy an air compressor. Note that the increase in CFM will result in decreased PSI and vice-versa.Īir compressors are used in various applications, from household applications to construction tools, and industrial purposes. Therefore, SCFM is the most ideal and correct rating that you should consider. Conditions such as higher altitudes and colder climates can alter the CFM of a compressor drastically. It is to be noted that the conditions vary from place to place. This is the best way to know which compressor you need for the desired application. An accurate indicator of a compressor’s power must be expressed as SCFM at a specific PSI number. CFM ratings work in conjunction with pressure ratings, i.e. Making a comparison of these CFM terms can be overwhelming and confusing to an average buyer. Some brands list the DCFM of the tool and not the SCFM.ĭCFM rating is the airflow produced in a perfect environment where there is 100% efficiency. While purchasing a new air compressor, do not get carried away by this rating of DCFM. Therefore, this CFM rating is usually the highest. It does not take into account the variables such as atmospheric pressure, humidity, temperature, friction or heat. That’s the formula that calculates the cylinder bore, number of RPM at which the motor operates and the stroke into CFM rating. It stands for displaced cubic feet per minute.

Air compressor 4 cfm@90psi