SISCO Particle Counters play an important role in HVAC system diagnostics and air filtration performance testing. Technicians evaluating building ventilation efficiency use handheld particle counters to assess particulate penetration, airflow patterns, and filter efficiency ratings across various zones. For high-rise office buildings, manufacturing plants, and data centers, maintaining clean air is vital for occupant health and equipment longevity. SISCO laser particle counter technology ensures technicians receive accurate particle-count measurements during commissioning, filter replacement planning, and system troubleshooting. Facility managers benefit from using online particle counters to continuously track particulate levels and detect anomalies caused by filter degradation or unbalanced airflow. Because SISCO digital particle counters store large datasets and generate detailed graphs, they help quantify improvements after system upgrades or retrofits. In cleanroom-dependent industries, HVAC specialists use SISCO instruments during laminar flow hood testing, pressurized room validation, and HEPA/ULPA filter certification. These applications demand high repeatability and traceable calibration—areas where SISCO excels. The portability, durability, and measurement precision of SISCO Particle Counters make them key tools for optimizing indoor air quality, reducing maintenance costs, and ensuring filtration systems meet regulatory and performance expectations.