Arrestance: Filter Explained for HVAC Professionals

As HVAC professionals, understanding the nuances of air filtration is essential for optimal system performance and customer satisfaction. One term you may often encounter is arrestance. In this blog, we’ll delve into what arrestance means and how it relates to air filters, particularly in terms of their ability to capture larger particles.

What is Arrestance?

In simple terms, arrestance refers to the amount of particles of non-specific size that a filter captures. More specifically, it describes how effectively an air filter can remove larger particles from the air, including dust, lint, hair, and other debris. This measurement is crucial for ensuring indoor air quality and maintaining the efficiency of HVAC systems.

Why Does Arrestance Matter?

When selecting air filters for HVAC systems, professionals must consider arrestance as a key factor. A filter with high arrestance will effectively trap more of these larger particles, leading to:

• Improved Indoor Air Quality: A filter with high arrestance helps to remove allergens and pollutants, creating a healthier living environment.
• Enhanced System Efficiency: By capturing dirt and debris, filters can reduce system strain. This can lead to lower energy bills and extend the lifespan of HVAC equipment.
• Reduced Maintenance: A cleaner system means less frequent maintenance and fewer repairs over time, leading to cost savings for both contractors and homeowners.

How to Measure Arrestance

Arrestance is typically expressed as a percentage, representing the total mass of particles captured by the filter compared to the total mass of particles that pass through. For HVAC professionals, it’s essential to choose filters with a balance of arrestance and airflow rate. Filters that are too dense might impede airflow, causing the system to work harder, which can lead to efficiency loss.

Choosing the Right Filter

When selecting filters for your HVAC systems, consider the arrestance ratings alongside other factors such as MERV (Minimum Efficiency Reporting Value) ratings and specific applications of HVAC systems. Knowing the typical contaminants present in your region, as well as the needs of your clients, will guide you in choosing a filter with the appropriate arrestance level.

Conclusion

Understanding arrestance is crucial for HVAC professionals who strive to provide the best air quality solutions for their clients. By choosing filters with the right arrestance, you can ensure effective particle removal, contribute to healthier indoor environments, and maintain the efficiency of HVAC systems.