LA2 | MAX | WM HEPA 4.5 499180

$245.00 available on subscription from $200.00 every 3 months

Part# 499180 Replaces the HEPA filter in Most LA2-RC2 and LA2-RC1 Models. Replaces HEPA Filter in all LA2-Rc2-HUV and LA2-RC1-HUV models.


Image of HEPA filter material

How HEPA Filters Work: A Deep Dive into the Mini-Pleat Design

The image to the right shows LakeAir HEPA filter cut apart to reveal its inner workings, specifically the mini-pleat design. This design is crucial to the filter’s effectiveness in capturing smoke particles and other airborne contaminants.

HEPA stands for High-Efficiency Particulate Air. These filters are indeed highly effective at removing even tiny particles from the air, thanks to their multi-layered construction. But what exactly makes them so efficient?

Here’s where the mini-pleat design comes in. As the image shows, the filter is made up of many pleated folds, which significantly increase the surface area compared to a flat filter. This creates a larger “maze” for air to flow through, allowing the filter to capture more particles.

The LakeAir HEPA filter uses a specific mini-pleat design that optimizes this efficiency. The pleats are very small and closely spaced, maximizing the surface area without restricting airflow. This ensures that the filter can capture a wide range of particle sizes, including smoke, dust, pollen, pet dander, mold spores, and even bacteria and viruses.

Key benefits of LakeAir HEPA filters with the mini-pleat design:

  • Highly effective: Captures up to 99.97% of particles as small as 0.3 microns, exceeding HEPA standards.
  • Broad spectrum protection: Removes a wide range of airborne contaminants, improving indoor air quality.
  • Long lifespan: The mini-pleat design allows for more dust capacity, extending the filter life.
  • Reduced energy consumption: The optimized airflow design minimizes pressure drop, allowing your air purifier to run more efficiently.

By using a carefully designed mini-pleat construction, LakeAir HEPA filters offer superior performance and protection against harmful airborne pollutants. This makes them a great choice for anyone looking to improve their indoor air quality and create a healthier home environment.


HEPA Filter Repurposing
How a filter traps dirt in a home air purifiier

Mechanical Process of Filtration

Imagine HEPA filters as tiny mazes for unwanted air particles. As air flows through the maze, these three strategies work together to trap even the tiniest culprits:

1. Sticky Walls (Impaction): Think of the maze walls as super sticky flypaper. Larger smoke particles, like dust and pollen, can’t change direction quickly enough as they zoom through the tight twists and turns of the maze. They bump straight into the sticky walls and get stuck, unable to escape.

2. Tangled Web (Interception): Now, picture the maze walls covered in a dense spiderweb. Smaller smoke particles, like pet dander and mold spores, might not get completely stuck by the “flypaper,” but they get close enough to the web (the filter fibers) to snag on them and get trapped.

3. Brownian Bounce (Diffusion): The smallest smoke particles, like viruses and bacteria, are super tiny and light. Imagine them like bouncy beach balls. These little guys get bumped around by air molecules as they travel through the maze. This random movement makes them wander off the main path and eventually collide with the sticky walls or tangled web, leading to their capture.

The key takeaway: HEPA filters don’t rely on just one method. They use a combination of these three strategies to capture a wide range of particles, big and small, making your air cleaner and healthier to breathe.

Bonus fact: The efficiency of each method depends on the particle size. Diffusion works best for the smallest particles, while impaction is more effective for larger ones. That’s why HEPA filters are rated based on their ability to capture particles of a specific size (usually 0.3 microns), ensuring they remove a high percentage of harmful pollutants from the air.

Additional information

Weight 8 lbs
Dimensions 20 × 16 × 4.5 in


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