Start with the tool, then trace the path
List the machines that will run one at a time or together, the pickup size at each tool, the duct route, flexible hose sections, and every fitting. The tool's needs only matter if the system can move the air there.
Read a CFM chart as a planning reference
A chart helps compare typical collection needs by machine and pickup size, but it does not replace the pressure-loss calculation or the equipment manufacturer's guidance for your exact system.
Protect airflow at the machine
Shorter runs, smoother transitions, properly sized ducts, clean filters, and open blast gates on the active run all help preserve airflow. Fix the largest restriction before adding complexity.
Shop 101
Turn this guide into a tested shop decision.
You leave with one documented input, one controlled result, and one clearer next action.
- Name the material, dimension, or cost input that affects the decision.
- Use the guide and calculator to make the assumption visible.
- Test or compare the result before committing final material, time, or client scope.
Related tools & lessons
Common questions
What CFM does a woodworking dust collector need?
The needed airflow depends on the tool, pickup design, duct size, route, fittings, and whether other ports are open. Use a calculator and manufacturer guidance to plan the actual system.
Why does a dust collector lose suction at the tool?
Long or undersized ducting, flexible hose, sharp fittings, leaks, clogged filters, and multiple open branches can all reduce the airflow that reaches the machine.
Can a CFM chart size the whole system?
Use it as a starting reference. A complete system plan also considers static pressure, duct layout, collector performance, and the specific machine pickup.