Similar to standard HVAC, cleanrooms are designed and built to meet various applications in the Biotech, Pharmaceutical, Semiconductor, and even Military & Aerospace industries. Cleanrooms are designed to control the temperature and the humidity to different levels of precision to create a comfortable environment. Along with comfort, cleanroom HVACs differentiate themselves from conventional systems by their increased air supply, airflow patterns, the use of high-efficiency filters, and room pressurization. The increased air supply brings more air changes per hour, with HEPA filtered air circulating into the cleanroom. In comparison, a conventional HVAC system usually counts two to four air changes per hour, whereas in a cleanroom, it can range anywhere from 15 to 300 or more. Cleanroom HVAC designs require knowledge of regulations, cleanliness level guidelines, airflow, room pressurization, temperature control, humidity control, and accounting of processes taking place inside.3S MEP + S has worked with a variety of pharmaceutical companies to provide MEP support for renovation, expansion, and new construction projects.