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A 17 cfm air compressor rating only holds at the pressure it was measured against, so the working PSI qualifies the number first. Use this category to filter for units rated at 17 CFM, then compare the delivered airflow at your required working PSI on each listing before ordering.
How often you draw air matters as much as the total figure. Intermittent use, where a tool runs briefly and then rests while the compressor recovers, places a lighter sustained demand than continuous operation does. Sustained draw or running more than one tool at once raises the continuous demand and can push your real requirement past 17 CFM. Because a compressor sized right at its rated output has little margin, plan for a buffer: a single-stage piston compressor should generally deliver about twice the application's required CFM, while a two-stage piston air compressor typically needs roughly 25 to 40 percent more.
Choosing 17 CFM works best once you have added up what your tasks actually use. Total the air demand of every tool or job running at the same time, not just the largest single tool, then take into account the duty cycle before comparing that figure against the delivered CFM on each product page. If your demand with considering duty cycle runs above 17 CFM, the units here will not cover it, so verify the demand figure before you order.
FAQ:
How much airflow buffer should I allow above my calculated figure?
Size above your totaled demand rather than at it, since a compressor running near its rated output has little margin. As a general rule, a single-stage piston compressor should deliver about twice the required CFM and a two-stage piston roughly 25 to 40 percent more, compared at your working PSI.