Simplifying Dust Collection for Your Woodworking Power Tools
Proper ductwork is all about providing a network that allows air to be pulled from each tool individually at ample velocity, and moving enough air volume to remove both the chips and the very fine dust produced. The primary enemy of ideal dust collection is static pressure. In applied terms you can think of static pressure as the force that restricts air flow.
Central Dust Collection - Dust Collection Tips, Jigs and Fixtures | WoodArchivist.com