Industrial Paint Booth Design Calculator

Calculate paint booth airflow (CFM), exhaust stack size, filter area, and makeup air heating from booth dimensions and face velocity per NFPA 33 guidelines.

Inputs

Booth width (ft)

Booth height (ft)

Booth length (ft)

Face velocity (fpm)

Temp rise for heating (°F)

Filter rated velocity (fpm)

Tab to move between fields

Results

Required airflow (CFM)

14,000

Stack diameter (in)

Cross-section (ft²)140

Air changes/hour250

Filter bank area (ft²)70

Heating load (BTU/hr)604,800

Heating load (kW)177.3

Fan motor (HP)13.6

How to Use This Calculator

Enter booth dimensions (length, width, height in feet) and required air changes per hour (ACH) for the solvent load.
Enter exhaust fan capacity (CFM) and filter face velocity (FPM).
Read required total CFM, number of exhaust fans, and makeup air volume.
Verify face velocity through filters is 80-120 FPM for downdraft booths per NFPA 33.
Calculate heating load for makeup air tempering to maintain 65-75°F for optimal paint application.

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