Spray Booth Air Flow Calculation

Paint booth air flow designs.

Spray booth air flow calculation.

For a good overview of all paint booth code compliance check out this article. Why paint booth cfm is important paint booths are designed to meet a minimum air flow requirement to be compliant with national codes that govern spray booths. The total flow through the booth 16 x 40 x 50 would be 32 000 cfm. Additionally the closer you are to the filterbank the faster the fpm will be in most booths.

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. If a downdraft paint booth is 16 feet wide and 14 feet tall typical air velocity in the booth would be 50 to 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. Discover the 4 basic types of booth airflow designs that best apply to your paint finishing requirements just select a crossdraft or downdraft airflow design below and learn the fundamentals of the airflow and filtration system.

I am planning a spray booth in my small barn shop. Multiply the booth s face area by 100 feet per minute to achieve cfm. The airflow of the fmp in the work area is a direct result of how the airstream flows through the work area. Using the example from above 80 square feet multiplied by 100 feet per minute equals 8 000 cfm.

A 14 wide x 9 tall x 26 long spray paint booth will exhaust at least 13 104 cubic feet of air per minute. For this example let s use 50 fpm. Running this spray booth for twenty minutes requires 262 080 cubic feet of available air. Dividing the flow rate by the volume 32 000 8 960 gives 3 5 air changes per minute.

Ask the expert question and answer archive. The real issue with air flow in a spray paint booth is having adequate air. 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. By ron joseph.

Fans to push and pull the air being pushed in and pulled out are done with two types of fans. Important codes that paint booths comply with include national fire code 1 nfpa 33 osha and a few others. I have tried to figure this out without having to post but i remain confused. Hello i have a math and set up question.

Assume a modified down draft no pit and the booth is 16 ft. Wide and 12 ft. This is the size of the fan needed. The calculations of a booth are based upon cubic feet of air in the booth and cfm of the exhaust system.

Calculating air flow rate velocity in a spray booth. One hundred feet per minute is the guideline for air movement in the booth area.