Welcome to CompressorPros.com.
Shop by Brand
4 CFM
A 4 cfm air compressor rating only holds at the pressure it was measured against, so the working PSI qualifies the number before anything else. Use this category to filter for units rated at 4 CFM, then compare the delivered airflow at your required working PSI on each listing before you order. Keep in mind that you need to supply twice as much CFM as your application demands for a single stage air compressor.
Matching Duty Cycle To Airflow At 4 CFM
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. Work filtered at 4 CFM is often intermittent, which is part of why this level of airflow can be workable. Sustained draw or running more than one tool at once raises the continuous demand and can push your real requirement well past 4 CFM. Total the airflow for everything running at the same time, not just the largest single tool, and compare that figure against the delivered CFM at your working PSI and allow for duty cycle.
Where 4 CFM Sits Among Nearby Options
This page targets exactly 4 CFM within the lower end of the airflow choices. Buyers who want to see a broader set of small-output units can browse the 0-5 CFM air compressors range, while those whose verified demand reaches higher can compare the exact 5 CFM air compressors page. Use the exact value here when your totaled demand at working pressure lands at about 2 CFM, and move to a linked comparison when your calculation is higher. For the wider airflow structure, start from the Shop by CFM page.
FAQ:
How much airflow should I allow above my calculated figure?
Allowing reasonable margin above your totaled demand helps cover pressure loss and sustained draw, so a unit rated close to your exact figure may actually be too small. Compare the delivered CFM at your working PSI and decide whether 4 CFM gives enough cushion for your work.
What else should I check alongside a 4 CFM rating?
Confirm the working PSI the airflow is rated at, since a maximum PSI is not delivered CFM, and account for pressure loss from hose length, fittings, filters, regulators, and piping between the tank and the tool.