ASHRAE 52.2 is a widely used standard for evaluating the performance of air filters used in heating, ventilation, and air-conditioning (AVAC) sistemas. The standard defines procedures for measuring the particle removal efficiency of filters and classifying them according to the Minimum Efficiency Reporting Value (MERV).
“The MERV rating helps users compare filter performance in removing particles of different sizes.”
MERV stands for Minimum Efficiency Reporting Value. The MERV rating indicates how effectively a filter removes particles from the air across several particle size ranges. ASHRAE 52.2 evaluates filtration efficiency using three particle size groups:
| Faixa de tamanho de partícula | Typical Sources |
| 0.3 – 1 µm | fine dust, smoke |
| 1 – 3 µm | bacteria, fine particles |
| 3 – 10 µm | pollen, mold spores |
The standard defines a controlled test method to evaluate filter performance. Key elements of the test include:
The results are used to determine the MERV classification.
Electrostatic Discharge and Appendix J
Some filters rely on electrostatic charge to enhance particle capture. ASHRAE 52.2 includes Appendix J, which introduces a conditioning procedure to reduce electrostatic charge before testing. This process helps ensure that filter performance reflects long-term operating conditions rather than temporary electrostatic effects.
|
MERV Rating |
Typical Application |
|
MERV 6 – 8 |
residential HVAC systems |
|
MERV 9 – 12 |
edifícios comerciais |
|
MERV 13 – 16 |
hospitals and high-performance ventilation |
Reliable and repeatable testing conditions are essential to ensure accurate MERV classification results. ASHRAE 52.2 testing is widely used for evaluating filters used in ventilation systems. Manufacturers and laboratories use the standard to:
Filtration testing systems designed for ASHRAE 52.2 procedures typically support:
These systems enable laboratories and manufacturers to perform reliable filter verification according to international standards.
Diga-nos o seu tipo de filtro, padrão de teste, e cenário de aplicação.
Nossos engenheiros ajudarão você a identificar a solução de teste mais adequada — desde sistemas padrão até plataformas totalmente personalizadas.
Nossos especialistas estão prontos para projetar uma solução personalizada para você. Conte-nos sobre seu projeto, e vamos verificar sua qualidade com precisão e rapidez.
*Respeitamos a sua confidencialidade e todas as informações são protegidas.
Não tenho certeza de qual padrão internacional se aplica ao seu projeto? Fale com nossos engenheiros seniores para uma avaliação técnica personalizada com base em nossa experiência de 10 anos no setor.
