Your professional cleaner uses water to clean your couch. The hot water extraction process starts out with a thorough application of upholstery cleaning solution which completely coats the fabric with the watery and soapy solution.
Then, when your cleaner rinses your couch, they use water again to rinse away the soils and the solution.
While this is, of course, the best way to clean upholstery, it also causes concerns about dry times.
The typical dry time for a couch after cleaning is anywhere from 8 to 12 hours. However, with the application of fans, the dry time can be cut in half or better. Some cleaners will bring in fans at the end of the cleaning to get the airflow started. This is a great way to speed up the dry times for upholstery.
If your carpet cleaner does not bring fans into your home, you can help speed the drying of your couch by bringing in fans of your own. Small box fans, oscillating fans, and ceiling fans all will help to get the airflow going. More airflow to the couch = less time for drying. Also, turning up the heat or opening windows (weather permitting) can also help speed up the drying.