How much CFM does a CP 1 inch Impact Wrench need?

I am interested in purchasing a Chicago Pneumatic 1 inch impact wrench. The model number is CPT5000. However, I am not sure how much CFM and PSI I need to run it. Can you advise me?

The Chicago Pneumatic CPT5000 1 inch impact wrench requires 90 psi and around 50 cfm to run it at load. Most 1 inch impact wrenches need anywhere from 45 to 75 cfm to run effectively. So its going to depend on the size of air compressor you own and how much demand is on the system. For example, you may be running several air tools for a few mechanics.