What size air compressor do I need?

You can use the following formula to figure out the size air compressor you need:

The Number of tools being used x the number of nails each tool will drive per minute x 1.2 (safety factor) x the Amount of Air per Shot (SCFM) at the operating pressure (psi). This number is found on the chart in the tool schematic and parts list provided with the nailer.

For example, if you have two F-350S tools each driving 20 nails per minute with the compressor set at 90 PSI you get: 2 x 20 x 1.2 x .082 = 3.95. The compressor needs to deliver 3.95 CFM at 90 PSI. If you operate the tool at 120 PSI at the same rate the number will be higher: 2 x 20 x 1.2 x .108 = 5.2 CFM. When selecting an air compressor be aware that as the air pressure (PSI) increases, the delivery rate (CFM) goes down. Most compressors will rate the CFM at 50 PSI and at 100 PSI.