1. What is a HEPA filter?
A filter is a device that traps and blocks small particles from going back into the air. A HEPA filter traps and blocks very small particles from getting back into the air. A certified HEPA filter is required and tested to trap particles as small as .3 microns with 99.97 % efficiency. One micron is 1/1,000,000 of a meter. A 0.3-micron particle is 300 times smaller than a human hair and 30 to 50 times smaller than the human eye can see.
2. Where is a HEPA filter used?
In medical research centers, Atomic research centers, nuclear power plants, hospitals, pharmaceutical manufacturing, HAZMAT service contractor (lead paint, asbestos, Anthrax, mold clean up).
3. Why is HEPA filtration required during mold abatement, disaster restoration and renovation projects?
HEPA filters are the only type of filter recognized by USEPA, CDC and other government agencies, and by environmental health professionals as effective for capturing these invisible particles and microbial spores that can potentially cause fungal infections.
4. How often do Abatement HEPA filters need to be changed?
Typical average filter life with continuous operation:
Primary filter: 1 day
Secondary filters: 3-7 days
HEPA filter: 800 hours
However, actual life can vary based on the size and concentration of airborne contaminants, temperature, humidity conditions and duration of use.
5. What if we don't/can't exhaust the filtered air to the outside?
Negative pressure will still be maintained if the HEPA filtered air is exhausted into an adjacent area inside the building. HEPA-AIRE PAS can also be utilized for continuous air cleaning, by recirculating 100% of the filtered air within the containment area. This will boost the ACH in the project zone and provide HEPA filtration, but it will not create negative pressure.
6. How often do Abatement HEPA filters need to be changed?
As the filters become loaded with particulate matter, the airflow capacity of the unit decreases and the static pressure differential across the filter increases. All models are equipped with easy-to-read and simple to use filter change indicator lamps that illuminate when filters should be replaced. Unlike gauges, these lamps do not require operator interpretation or calculations.