Air velocity of 100 lfm calculates to 1.1 miles per hour. A paint booth should move enough CFM to both produce good paint jobs and meet OSHA requirements of 80-100 feet per minute. Your paint booth manufacturer should meet OSHA in all of its paint booths … 10321 Veterans Memorial Dr, Houston, TX 77038-----Join Our Email List. OSHA requirements take into account the booth space, the CFM, and the draft pattern. CFM Calculator: File Size: 465 kb: File Type: pdf: Download File. For example, if your booth is 16 feet wide by 14 feet tall and is a crossdraft design, typical velocity in the booth would be 100 feet per minute (fpm). A concern of some new spray paint booth owners has been ‘my spray booth is a tornado’. Comparing this to a normal walking pace of 3-4 miles per hour shows that no spray paint booth … To know how long you can run the booth before running out of heated air you calculate the cfm of a booth by taking the width x height x 100 for a cross draft or length x width x 50 for a downdraft, this will give you the approximate cubic feet a minute draw of the booth. The total flow through the booth would be 22,400 cubic feet per minute (CFM… Contact Schedule Service Request a Quote ... Equipment Repair Filters Installation Layout Builder Lift Inspections Paint Booth … CFM Calculator. From the design velocity you can calculate ventilation flow rates and air changes.