A fan filter unit, or FFU, is essentially a filtered laminar flow diffuser with an
integrated fan and motor.
The integrated fan and motor provide enough static pressure to overcome the pressure
drop of the internally mounted HEPA or ULPA filter.
A HEPA filter is a high efficiency air particulate air filter that can capture
ultrafine pollutants. HEPA filters are considered the industry standard for removing
dust, pollen, mold, bacteria, particulate matter, and other airborne particles. A
HEPA filter is found in air purifiers and forced-air HVAC systems. There are two
common standards for HEPA filters: European and U.S. In Europe, HEPA filters must
remove 99.95% (ISO) of particles that are 0.3 microns in size. In the U.S., HEPA
filters must remove 99.97% of particles that are 0.3 microns in size.
A pre-filter is an air filter that removes large particles like dust, dirt, and
hair. Pre-filters are the first step in the air filtration process on an air
purifier. A pre-filter protects the main air filters from getting clogged up with
debris so they can trap microscopic pollutants.
A high efficiency particulate air (HEPA) filter can remove 99.97% - 99.99% of
airborne particles that are equal to or larger than 0.3 microns in size. The
efficiency is rated based on the worst level possible, so think about it as 99.97%
or BETTER. The filters are tested using air particles that are 0.3 micron size as
those are the most difficult size for a HEPA filter to catch. HEPA filters are
actually more efficient at capturing smaller particles, like those the size of
With most people looking for better ways to protect themselves against potential
airborne transmission of COVID-19, many products on the market are being promoted as
effective devices to implement in their residences and businesses. One major step
towards reducing the risk of COVID-19 noted by many health safety organizations
would be the upgrade of the building’s air filter to one that is rated at a MERV 13
level or higher.
Many people treat the choice of an air filter for their homes like an afterthought.
In some other cases, we have seen many go multiple months without even checking on
their filters, talkless of making a move to change them. If you happen to fall into
any of the above categories, you are doing yourself more harm than good
Semiconductors are a vital component of almost every electronic item we rely on in a
modern world: cell phones, vehicles, microwaves, computers, televisions — the list
goes on. When there are shortages due to a lack of materials or slow production,
that delay is felt up the supply chain by every consumer who is buying a new phone
or computer, or even renting a vehicle.
There’s a lot to talk about when it comes to HEPA filters – short for
high-efficiency particulate air filters – especially when seeking a sound solution
to improve indoor air quality. The hefty HEPA has earned bragging rights, offering
top-of-the-line protection when it comes to capturing a majority of tiny airborne
contaminants and keeping occupants safe in an indoor pocket of space.
With lingering air quality problems both inside and out, many people are turning to
air purifiers to create healthier, cleaner air in the home. These air purifiers use
numerous technologies and have many different components.