How do the filters in Briiv work?

The filters are designed to capture particles in the air through a series of physical and mechanical processes. Here's a list of some of those processes.

1. Filter Structure 

The filters consist of a dense arrangement of randomly arranged fibres that create a labyrinth path for air to flow through.

2. Interception

Larger particles are captured through a process called interception. As air flows through the filter these particles, due to their size and inertia, are unable to navigate through the fibres and instead collide with and stick to the fibres. This happens mostly in the moss layer.

3. Impaction

Medium-sized particles follow the air stream but, due to their inertia, are unable to adjust quickly to the air flow direction changes caused by the fibres. This causes them to impact and get stuck to the fibres. This happens mostly in the coconut layer.

4. Diffusion

Smaller particles, influenced by Brownian motion (random movement of particles in the air), are more likely to collide with and be captured by much finer filter fibres. This is happening mostly in the final matrix layers of Briiv Pro.

5. Sieving

The dense arrangement of fibres acts as a sieve, effectively capturing particles of various sizes as they attempt to pass through the filter.

6. Electrostatic build up

The final layer uses a glass fibre as the base material. This builds up an electrostatic charge as the air passes through it. This action then acts like a magnet pulling particulates onto and into the filter as it passes through it.