The International Mechanical Code (IMC) sets the standards for ventilation in nail salons. The code requires that nail salons have a minimum of 25 cubic feet per minute (CFM) of outdoor air per person, as well as a minimum of 50 CFM of exhaust ventilation per nail station. The exhaust ventilation (also known as SOURCE CAPTURE) must also be directed to the outside of the building, away from any windows or doors that could allow the fumes to re-enter the building.