What is CFM?
Many do-it-yourselfers often rate the power of an air compressor by PSI (pounds per square inch) or HP (horsepower). These novice shoppers are overlooking the acronym that truly measures an air compressor's strength.
CFM (cubic feet per minute) is the best gauge in determining an air compressor's power. You should select an air compressor that exceeds the CFM of your most powerful air tool. This will ensure that you're never under-powered.
You should find out the exact air requirements for your most powerful tool first, and then pick your compressor. You can check out Air Compressors Direct's CFM Guide to help you estimate the CFM ratings for common air tools.
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