Spray Booth Air Flow Requirements

Spray areas appear to be covered under 29 cfr 1910 107 which does not specify a minimum design airflow rate.

Spray booth air flow requirements.

Spray booth safety tips. Their air flow requirements are summarized below. The three main styles of paint booths are cross draft down draft and side down draft paint booths. From your question is it not clear what you mean by semi downdraft booth.

One hundred feet per minute is the guideline for air movement in the booth area. Velocity and air flow requirements. Osha 29 1910 and nfpa 33 have minimum requirements for air flow to decrease the concentration of flammable materials in a spray paint booth. We consider the painting area a spray area rather than a spray room or booth.

The old standard was 100 linear feet per minute lfm and this is still stated in the international fire code ifc. Aside from these minimum requirements for paint booths there are some essential safety practices to make sure your booth is maintained properly. Typical paint booth air flow values can be read about here or just remember typically a cross draft paint booth will have air flow of about 100 feet per minute based on the width and height of the booth a downdraft will have air flow of about 50 feet per minute. Restrict access for anyone with asthma allergies and respiratory illnesses.

1910 94 c 6 i except where a spray booth has an adequate air replacement system the velocity of air into all openings of a spray booth shall be not less than that specified in table g 10 for the operating conditions specified. Many spray equipnment companies regard a downdraft booth to be a large booth and they design for the 50 ft min target. Multiply the booth s face area by 100 feet per minute to achieve cfm. In the past nfpa dictated paint booth air flow needed to be 100 fpm for non electric static coating application downdrafts were usually between 50 100 fpm.

Once you have measured the air flow you will want to see what the original design specification for your paint booth airflow was. 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. The spray booth should be located to allow for proper air entry and flow through the booth. Controlling the paint booth air flow going into the booth with relation to the air being exhausted from the booth is critically important to maintain the proper flow of air over the item being painted and remove the over spray effectively.

This is the size of the fan needed. Fans to push and pull the air being pushed in and pulled out are done with two types of fans. Keep your spray booth clean and change filters regularly.