We installed the HEPA terminal modules and the DPT-3000 transmitters in our QC microbiology lab about a month ago. The pressure cascade held steady at 12.5 Pa between the positive corridor and the aseptic room, even during the afternoon HVAC cycling. The only hiccup was the initial Modbus addressing on the transmitters, but the support team walked us through it in one call. For a first month, that is a solid start.