Air
Filtration Systems offers all services to resolve or control Airborne
Infectious Diseases (AID) that include Flu viruses like H1N1,
Tuberculosis (TB)
or other AID cases.
Our
experience in hospital and many other installations will help you to
get the best control medoths for your application and to determine the most cost effective
solutions for your
particular situation. Upon installation, Air Filtration Systems will
provide start up assistance to you and your staff to ensure the
equipment is functioning properly, meeting your needs and you staff is
comfortable with operating it.
Most Recent Alert - H1N1
Saturday October 24th President Obama signed an Emergency Declaration for the H1N1 flu.
Part
of what this declaration does is allow a means for health care
facilities to bypass normal protocol in treating patients.
This means that hospitals dealing with a high number of H1N1 cases can
use air filtration systems or products to help control the spread of
H1N1.
Swine
Flu Virus Distance of Travel:
Large Particle
Droplet Nuclei
Category
# Shed Distance Traveled Distance Traveled
Cough
3,000+ 1-5 feet
160+ feet
Sneezing
3,000+
8-15 feet
160+
feet
Breathing
Nose
None
Mouth
Varies 1-3 feet
160+ feet
Talking/Singing
1,000+ 1-3 feet
160+ feet
Diarrhea*
20,000+ 5+ feet
160+ feet
(*as
a
result of toilet water aerosolization)
President
Obama’s Declaration – from a summary
“…permits the Secretary of Health and Human
Services to waive certain regulatory requirements for healthcare
facilities in response to emergencies”
“Examples of use of waivers: Hospitals request to
set up an alternative screening location for patients away from the
hospital’s main campus”...
URL: http://www.flu.gov/professional/federal/h1n1emergency10242009.html
ASHRAE
Position Paper
“Droplet nuclei particles may be transported through
ventilation systems, as has been documented for tuberculosis, Q-fever,
and measles (Li et al., 2007). If influenza transmission occurs not
only through direct contact or large droplets, as is the long-standing
public health tradition, but also through the airborne route, as newer
data suggest, HVAC systems may contribute far more both to transmission
of disease and, potentially, to reduction of transmission
risk.”
URL: http://www.ashrae.org/docLib/20090901_AirborneInfexDiseasesPDFrev.pdf
Questions
& Answers
Is
HEPA filtration required to control viruses?
The
simple answer is no, although a better job is of course is done when a
TRUE SEALED HEPA ( MERV 17 to 20) is used. Even then
other means of control is recommended. (see page 8 in the above ASHRAE
Paper, foot note)
What levels of filtration is available for H1N1 Flu Virus?
Mechanical
Air Filters (sealed) can trap this % of Swine Flu Viruses:
|
MERV |
%Viruses
Arrested |
w/MERV
& UVR |
|
6 |
6.2% |
10% |
|
7 |
7% |
12% |
|
8 |
11% |
19% |
|
10 |
12% |
35% |
|
13 |
46% |
84% |
|
15 |
71% |
97% |
|
16 |
76% |
98.8% |
|
17-20 |
99.9% HEPA's |
see note below |
|
HEPA
Note:
What most people forget about HEPA is it is ONLY 99.9%
effective on particle 0.3 micron size. Back in the day when we were
controlling TB we still ran UVR to remove viruses sizes that the HEPA
didn't remove.
When running UVR & MERV we are saying total efficiency, not
just particle size. |
Please
note filtration is REQUIRED to be sealed!
Are there any dangers in our
staff replacing air filters that may have been exposed to H1N1?
Yes, but
this is also a general Yes when it comes to filtration. What you need
to consider when it comes to filtration is we remove particles at all
sizes. The above chart shows a MERV 13 removing 46% of the H1N1 virus
so you do have a chance of exposure. When your staff is replacing air
filters or even working on airflow equipment they should wear
protective clothing or equipment. I know of a person who had contracted
blood disease that almost killed him in 24 hours replacing air
filters. (see page 8 in the above ASHRAE Paper, foot note)
Side Note from Mack Barnhardt
There is not
a complete system that does it all. Each building or application in a
building may require a personal touch to make the air filtration system
effective.
To control Airborne Infectious
Diseases in your building please contact us for a initial free
consultation.
AFScorp
Team
|