Choosing a paint booth isn't just a matter of size. The direction of airflow determines where the overspray goes, how much dust reaches the part, and how much the painter is exposed to paint mist. Below, we explain how each airflow works, its advantages, limitations, and who it makes the most sense for.<\/p>\n
Every booth does two things at the same time: it blows in clean air and exhausts air containing paint mist. The path between the inlet and the outlet determines the outcome.<\/p>\n
To understand the basic structure of air intake, filtration, and exhaust, see How does a paint booth work?<\/a>.<\/p>\n In a cross-draft cabin, air enters from the front, usually through doors with filters, and runs parallel to the floor to the back wall, where the exhaust filters are located.<\/p>\n Advantages:<\/strong><\/p>\n Limits:<\/strong><\/p>\n Recommended for:<\/strong> Industrial parts, furniture, components, and projects where a Class A finish is not a priority.<\/p>\n In a side draft cabin, also called a side down draft cabin, air enters through the ceiling and descends to the lower part of the side walls, where the exhaust points are located. The air passes through the unit from top to bottom and exits on both sides.<\/p>\n Advantages:<\/strong><\/p>\n Limits:<\/strong><\/p>\n Recommended for:<\/strong> Long pieces of equipment and large vehicles, such as buses, trucks, agricultural machinery and implements, can be used when it is not possible to dig a well.<\/p>\n A semi-down draft booth is a middle ground between cross-draft and down-draft. Air enters through a plenum in the ceiling, usually at the front, and exits through the lower part of the back wall. The result is a diagonal flow that descends over the part before proceeding to the exhaust.<\/p>\n Advantages:<\/strong><\/p>\n Limits:<\/strong><\/p>\n Recommended for:<\/strong> Automotive refinishing workshops and manufacturers who want to raise the level of finish without the cost of a pit.<\/p>\n In a down-draft cabin, air enters through the entire ceiling, passes through supply filters, and descends vertically to the floor. The exhaust is located on the floor, through grilles above a pit or an elevated base. Gravity helps: the overspray falls directly into the exhaust, without passing over other parts of the unit.<\/p>\n Advantages:<\/strong><\/p>\n Limits:<\/strong><\/p>\n Recommended for:<\/strong> High-end automotive refinishing, for automakers, aviation, and any process where the finish is the key differentiator.<\/p>\nCross draft: horizontal flow<\/h2>\n
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Side draft: downward lateral flow<\/h2>\n
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Semi down draft: diagonal flow<\/h2>\n
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Down draft: total downward flow<\/h2>\n
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Comparison between the four airflows<\/h2>\n