What is Preferred Vacuum Testing (PVT)?

The industry standard approach is to assess air quality through measuring various parameters, including: particulate matter chemical pollutants microbial contaminants. Preferred Vacuum testing or negative pressure testing, may be used in certain situations to evaluate the performance of ventilation systems and the overall air hygiene. Here are some reasons why vacuum testing is important for air hygiene reporting: Ductwork Integrity: Vacuum testing can be used to assess the integrity of ductwork in ventilation systems. It helps identify leaks, gaps, or other issues that could compromise the efficiency of the system and contribute to the spread of contaminants. Airflow Measurement: Vacuum testing allows for the measurement of airflow rates within a ventilation system. Proper airflow is crucial for maintaining air quality and ensuring that contaminants are effectively removed. Containment Assessment: In environments where airborne contaminants need to be controlled (such as in laboratories, cleanrooms, or healthcare facilities), vacuum testing helps evaluate the effectiveness of containment systems, such as fume hoods or isolation rooms. Pressure Differentials: Maintaining appropriate pressure differentials between different zones is critical for preventing the spread of contaminants. Vacuum testing can be used to measure and ensure proper pressure differentials are maintained. Regulatory Compliance: Many industries and facilities are subject to regulations and standards related to air quality. Vacuum testing may be preferred to ensure compliance with specific air hygiene standards and guidelines. Health and Safety: Assessing air quality through vacuum testing contributes to creating a healthier and safer indoor environment. It helps identify potential issues that could affect the well-being of occupants. Performance Verification: Vacuum testing serves as a method for verifying the performance of ventilation systems, ensuring that they meet the designed specifications and effectively control indoor air quality. It is a legal requirement for the building owner or occupier to ensure air handling units are kept clean and contaminant-free, and in many cases, Air Hygiene tests have uncovered serious potential hazards which our clients were then able to address on their premises. Using Preferred Vacuum Tests (PVT)  or Microbiological Swab Tests we can assess the air quality passing through the ventilation system. Tests are taken on-site by appointment and sent to our laboratory for testing. A detailed report is provided to measure the Air Quality against 3 different SQC Ratings: Hospitals Labs Schools Restaurants Warehouses Depending on the levels of contamination found, the ventilation system is given a pass or fail rating. The results of this testing are then issued in a report to the client with our recommendations for the next steps if required. All VSS Ireland site works are overseen by our experienced contract management team and service delivery department.