In terms of filtration media, what does "depth loading" refer to?

Depth loading refers to a filtration design that captures particles throughout the thickness of the filter media rather than just at the surface. This method allows for a more effective filtration process, as particles are trapped within the material rather than simply being caught on the surface.

Depth-loaded filters have a structure that enables them to capture a wide range of particle sizes and provide a greater capacity for trapping dirt and contaminants. This characteristic helps to enhance the filter's lifespan and efficiency because the accumulation of particles does not immediately lead to a significant drop in airflow resistance.

In contrast, designs that only capture particles at the surface tend to require more frequent replacement, as their ability to filter efficiently diminishes once the surface is clogged. Additionally, depth loading is not limited to specific filter types, such as HEPA filters or washable filters; it can be utilized in various filtration applications to improve overall air quality. This versatility contributes to its effectiveness in a wide array of HVAC and air quality systems.