Edd Helms is Your
Indoor Air Quality Specialist!
Edd Helms Air Conditioning Protects your Home or
Office from Airborne Bacteria
Most air conditioning systems re-circulate the air
in your home or office about 80 times a day. Edd Helms Air
Conditioning can install a UVGI air purification system into your
central air conditioner to help protect your family and employees
from airborne diseases. UVGI has been used for years in the food
industry to kill bacteria, and it was recently mentioned in many
national anthrax news stories.
UVGI Frequently Asked Questions
HOW LONG WILL IT TAKE FOR THE EDD HELMS TECHNICIAN TO INSTALL MY
A: Most installations for central air
conditioners up to 5 tons are normally completed within 4 hours. For
larger central systems, installation times will vary, but most can
be completed within several days.
MUCH DOES THE COMPLETE UVGI SYSTEM COST TO INSTALL?
A: Over the phone prices start at $697
for central air conditioners up to 5 tons. Prices for larger systems
vary depending on the size of the central air conditioner.
HOW DO I PLACE MY ORDER AND MAKE AN INSTALLATION APPOINTMENT?
A: Complete our on-line order form or
call us at 1-800-329-2530 and tell us when you would like your
system installed. We accept all major credit cards.
IS EDD HELMS AIR CONDITIONING?
A: We are a division of the Edd Helms
Group who, for the past 27 years has served South Florida with air
conditioning, electrical, and data communications services. Our
thousands of satisfied of residential and commercial customers are
evidence of our commitment to customer satisfaction.-
IS A UVGI AND HOW DOES IT WORK?
A: UVGI is the abbreviation for
Ultraviolet Germicidal Irradiation. The use of UVGI for the
sterilization of microorganisms has been studied since the 1930's.
Microbes are uniquely vulnerable to the effects of light at
wavelengths at or near 253.7 nanometers (UV-C germicidal) due to the
resonance of this wavelength with the molecular structure. Looking
at is another way, the quantity of energy UVGI possesses is just the
right amount of energy to break organic molecular bonds. This bond
breakage translates into cellular damage to the bacteria, fungus, or
viruses. With 11 watts of output per lamp, the UVGI intensity is 125
microwatts per cubic centimeter within 12 inches of each lamp. Most
central AC systems up to 5 tons require two lamps, which give an
effective UVGI intensity inside the air handler of approximately 250
microwatts. Larger systems require additional lamps to maintain the
required UVGI intensity levels.
HOW MUCH CONTINUOUS UVGI EXPOSURE IS REQUIRED TO KILL VIRUSES OR
A: Some microorganisms are killed in
fractions of a second while others require longer exposure.
Manufacturers of UVGI equipment provide several charts which outline
a list of microorganisms and the approximate kill time required.
Those charts are based on findings of researchers, with some studies
showing different kill time values than others. Accordingly, the
varying kill times are included in the manufacturer's charts.
Research performed by Mitscherlich and martin in 1984 found that 99%
of all Bacillus Anthraci bacteria were killed within 3.6 seconds
with 25 microwatts per cubic centimeter, and 99% of Bacillus
Anthraci spores were killed within 230 seconds with 25 microwatts
per cubic centimeter. A chart provided by one manufacturer indicates
that with one hour of continuous air conditioning system operation,
the airborne concentrations of Viral Colony Forming Units (CFU) per
cubic meter is reduced from 500 CFU's to less than 10 CFU's;
Bacterial CFU's reduced from 500 to less than 100; and Spore CFU's
reduced from 500 to less than 300. That same chart shows that after
3 hours of continuous air conditioning system operation, both Viral
and Bacterial CFU's are virtually eliminated while Spore CFU's level
off at about 100 per cubic meter.
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