DefendAir Primary HEPA Filter

Primary HEPA filter with efficiency rating of 99.97% against 0.3 micron oily aerosol particles, combining filtration efficiency and large capacity. To maximise HEPA filter life, be sure to change the pre-filters regularly.

Features

HEPA 500 filters combine fine particle capture with filter capacity.
Replace prefilters whenever dust and debris accumulation is visible.
Replace HEPA filter when change light turns on.
The HEPA filtration standard was originally developed in the 1940s to control radioactive dust particles in U.S. nuclear laboratories.
Note: To help prevent cross-contamination, we recommend replacing the HEPA filter after each job involving mould, sewage, or other microbial contaminants, and also after use in an environment that may contain toxic substances such as asbestos. Wear appropriate protective gear when handling contaminated filters and dispose according to local regulations

Specs

Efficiency rating: 99.97% against 0.3 micron oily aerosol particles.
Media: Synthetic fibre
Frame: Rigid plastic
Sold as single Filter

The DefendAir HEPA 500 may be set up in a variety of filter configurations to suit your particular air scrubbing requirements. Use the chart below to find the best filtration setup for your project.

Filtering Application	First filter position	Second filter position	Final filter position (HEPA)
Clean water loss air scrubbing. For a relatively clean environment.	n/a	30% Prefilter (F271)	HEPA filter (F321)
Standard air scrubbing. For environments with higher particle loads, such as construction or remodelling sites.	10% Prefilter (F270)	30% Prefilter (F271)	HEPA filter (F321)
First pass efficiency air filtration. For use with a negative air setup during remediation of high risk contaminants and/or when DOP testing is required.	30% Prefilter (F271)	DOP Prefilter (F415)	HEPA filter (F321)
Odour control and air filtration. For the removal volatile organic compounds (VOCs), food odours, fumes from paint and paint thinners, sewer odours, and many other noxious odours.	Activated Carbon Filter (F397)	30% Prefilter (F271)	HEPA filter (F321)