2 technology changes. By comparison, using the booth face area, instead of the area of its footprint, is based on moving a column of air the cross section of the extraction booth in a straight line horizontally at a capture velocity of 100 feet per minute, as recommended in the following tables copied from Ventilation Handbook, 17th Addition, page 4-5, Table 4-1. Many spray equipnment companies regard a downdraft booth to be a large booth and they design for the 50 ft/min target. Chapter 7 of NFPA 33 outlines the most important requirements of spray booth ventilation. From your question is it not clear what you mean by "semi-downdraft" booth. The high volumes of paint used in the automotive industry also drove the need for environmental regulation in the form of limits on air pollution. OSHA 29.1910 and NFPA-33 have minimum requirements for air flow to decrease the concentration of flammable materials in a spray paint booth. Spray booth. The building company I work for are building a paint spray booth within another building and I will be installing around 36 flourescent light units. For each of these, the minimum performance requirements are listed as well as general information on when each of these is required in spray booth design. IET » Wiring and the regulations » Lighting in a paint spray booth. Some booths are designed so that air entering at the back of the booth but from the ceiling moves to the far end of the booth where exhaust filters are located. This air velocity is calculated with the spray paint booth empty and using a cross-sectional area of the air flow direction. We supply and install spray booth ventilation and spray booth extraction systems.Spray booths require an adequate air change and extraction systems to ensure that there is not a high build up of paint fumes within the spray booth this is both for comfort and to ensure a perfect paint job.. The three main topics covered in this section are powder coating systems, make-up air, and recirculated air. 1910.107(a)(4) Waterwash spray booth. Since fire is always a risk when running a spray booth, operators are subject to many of the regulations set forth by the NFPA, especially NFPA-33 National Fire Protection Association's Standard for Spray Application Using Flammable or Combustible Materials. The old standard was 100 linear feet per minute (lfm), and this is still stated in the International Fire Code (IFC). The company that has requested the work will be using their electrician to finally connect my install to their supply. Canadian buyers need to ensure the spray booth they purchase is from a paint booth manufacturer that understands that for customers in Canada, there are specific criteria that must be met compared to U.S. regulations. Limiting air pollution from painting operations has often involved changes in coating chemistry. 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