Today, no one would design a paint booth without considering control of the psychrometric parameters inside. A relative humidity (RH) of up to 65-75% is often used for waterborne paints to avoid aerosol evaporation, pigment clumping and premature drying, and to achieve a consistent coating rate. Individual manufacturers recommend in their product sheets the ideal conditions under which their paint should be applied. This reduces consumption and makes application more efficient. However, all manufacturers agree that humidity in the booth must be considered and controlled to achieve high quality finishes.