Air Purification
New Package!
24 volt transformer included!
A I R
P U R I F I C A T I O N
G U I D E
w w w . f i e l d c o n t r o l s . c o m
June 2007
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Air Purification System
Indoor Air: High Concentrations of
Biological Contaminants
With tighter building construction in recent years, the
quality of indoor air has declined dramatically.
The air circulating in the ductwork of the average
home or office can be concentrated with contaminants
including molds, bacteria, viruses, and dust mites.
We fill our lungs up to 20,000 times each day. Over
time, these contaminants can cause inflammation of
the mucous membranes, upper respiratory problems,
asthmatic conditions, headaches, and flu-like symptoms.
Filtering systems offer little or no help because these
airborne contaminants either pass through the filter or
simply collect on the filter medium, creating a breeding
ground. Now, with the UV-Aire® Air Purifying System, a
solution is available to directly address the problems
associated with poor indoor air quality.
The Sun: Nature’s Outdoor Air Purifier
For years, scientists have known that one of the most
effective air purifiers is natural sunlight. Not the light we
see when we look out the window, but the invisible “C”
band, ultraviolet rays that make up part of the sun’s light
spectrum. The sun’s UV-C rays act as a natural outdoor
air purification system, inhibiting the growth and
reproduction of bacteria, viruses, fungi, molds, and dust
mites. However, this natural process does not occur
indoors. Ultraviolet radiation (UV-C) replicates the natural
outdoor purification system of the sun by destroying the
illness and disease-causing microbes living and
Fungus
Mold
Bacteria
Dust Mites
multiplying in indoor air. In combination with a quality
filter, it is the most effective way to reduce airborne
contaminants and the health risks they represent.
EL-1 Eliminator®
Foundation Vent Fan
With the Eliminator, air changes are increased
dramatically for better moisture removal and control.
The EL-1 is designed to be mounted to a crawl space
vent. It operates off a temperature switch which
activates the motor at or above 50°F. An optional,
adjustable de-humidistat can be used to activate the
unit at varying levels of relative humidity. This optional
control can be wired in place of, or in series with, the
standard temperature switch.
Eliminate Moisture Problems
Excessive moisture under a house can
contribute to air pollution inside the
house. The Eliminator® Foundation Vent
Fan is a motorized fan designed for circulating outside
air through the crawl space of a structure to reduce
moisture and moisture-related problems. In addition to
dry rot, fungus growth and increasing termite potential,
excessive moisture can generate mold. Mold and mold
spores can infiltrate the living space as well as the
HVAC system, causing problems for the inhabitants.
3
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Air Purification System
Facts About Indoor Air
• According to the Environmental Protection Agency,
the air in homes can be up to 100 times more
polluted than outdoor air.1
• Health effects may show up immediately, or after
years of exposure to poor indoor air quality. These
symptoms include some respiratory diseases, heart
disease, and cancer. They may be severely
debilitating or fatal.3
• The National Academy of Sciences Institute of
Medicine reports that exposure to indoor pollutants
is a key contributor to the asthma problems of
this nation.2
• Most allergy and asthma sources are passed from
person to person through the air.
• The air in a single room can contain hundreds of
thousands of infectious bacteria, viruses, fungal
spores, and contaminants, which can only be seen
with a microscope.
UV-Aire®
UV-16/24
w/transformer
UV-Aire®
Standard model
Facts About UV
• The disinfection of medical equipment using UV
has been a common and reliable practice.4
• UV disinfection has been determined to be
adequate for inactivating bacteria and viruses.5
• The germicidal effects of UV light cause
photochemical damage to DNA and RNA
within microorganisms.6
• “...ultraviolet radiation, properly integrated with
heating, ventilating, and air conditioning systems,
shows the most promise as a widely applicable
means of air disinfection.” Richard Riley, M.D.7
* The UV-V wavelength generates ozone. According to the
Environmental Protection Agency, ozone can be harmful to your
health. When inhaled, ozone can damage the lungs. Relatively
low amounts of ozone can cause chest pain, coughing,
shortness of breath, and throat irritation. Ozone can also
compromise your ability to fight respiratory infections.
All UV-Aire lamps are coated to block this wavelength.
4. “UVGI Design Basics” HPAC. January 2000.
5. EPA Guidance Manual Alternative Disinfectants and Oxidants. April 1999.
6. Jagger, J. 1967. Introduction to Research in Ultraviolet Photobiology. Prentice-Hall, Inc., Englewood Cliffs, NJ
7. Richard Riley, M.D. “Airborne Infection” The American Journal of Medicine, September 1974, Vol. 57
4
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Air Purification System
How The In-duct UV-Aire Works
UV-Aire uses the energy from a specially designed,
high-intensity UV-C lamp to reduce microorganisms in
the entire home as they cycle through the HVAC system.
Mounted inside the ductwork, the UV-Aire sterilizes or
kills most contaminants as they pass the lamp.
Best Installation
Location (down-
stream of the A-coil)
Coils and filters are breed-
ing grounds for mold and
bacteria. Installing the sys-
tem here significantly
reduces indoor air
Ultraviolet Treatment Zone
The process requires very little maintenance and costs
just pennies a day to operate. The UV-Aire could be one
of the best health and comfort investments a
homeowner ever makes.
contaminants and
new growth.
SUPPLY
A-Coil
Installing UV-Aire
near the coil helps
maintain optimal
efficiency of the
HVAC system.
Indoor Air Treatment With UV
RETURN
UV’s effectiveness in killing bacteria is directly related
to a microorganism’s exposure time. Indoor air in a
typical residential forced-air HVAC system will be
recirculated 40-75 times a day. With a UV generating
lamp mounted in the HVAC duct, cumulative exposure
can be very effective in controlling indoor bacteria.
UV rays will also kill germs that breed in drain pans
and A-coils. Properly positioned, an ultraviolet system
can significantly reduce indoor air contamination and
prevent the growth of new microorganisms.
Optional
Installation
Location
The treatment of indoor air with ultraviolet radiation
has been successful in health care facilities, food
processing plants, schools, laboratories and other
applications. It is safe, silent, and proven.
Filter Systems Alone Don't Solve the Problem
The majority of indoor air is conditioned by forced-air
heating and cooling (HVAC) systems. Standard fiber
air filters are entirely ineffective in trapping germs, as
most particles are simply too small, passing through
the porous filter. New, high efficiency style filters will
only capture airborne bacteria down to a certain size.
These high efficiency filters are nominally effective,
trapping small airborne contaminants on the filter,
creating a breeding ground where germs can continue
to grow and multiply.
Since direct exposure to UV light can cause skin
cancer and blindness, the most practical application
of UV light in the home or office is in the main air
distribution (heating and/or air conditioning) system.
As UV light will not pass through metal, glass, or
plastic, a UV light can be installed in the main supply
or return duct of a central heating or air system
without concern for direct exposure to eyes or skin.
This is an ideal location since the air in the home or
office will pass through the HVAC system up to 75
times per day during normal operation, and as many
as 150 times per day in continuous fan mode.
HVAC systems are a dark and damp breeding ground
for mold and bacteria, particularly at the system filter
and air conditioning A-coil. The buildup of matter on
the A-coil and filter can significantly reduce the
efficiency of the appliance by constricting and reducing
air flow. This means increased cost to the homeowner
in addition to the risk of airborne pollutants.
5
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Air Purification System
(In-duct Models)
STANDARD MODELS
EXTERNAL MODELS
UV-12E, UV-18E, UV-28E
UV-12, UV-18, UV-28, UV-12HP,
UV-18HP, UV-28HP
• For outdoor installations
• Ideal for any external
package systems
• For rooftop applications
• Hard wired for 120V,
208V, or 240V
• Hinged cover for easy accessibility
• Includes patent pending angle
bracket and duct board mounting kit
• Installs easily and plugs into a
standard 120V outlet
• All UV-HP (heatpump) models
are 240V
REMOTE MODEL
UV-16/120
• 120 Volt
DUAL LAMP MODEL
UV-18X
• Double lamp maximizes intensity
and effectiveness
Plugs into standard outlet
• Compact Design
• Handles up to 4000 sq. ft.
• Includes patent pending angle
bracket and duct board mounting kit
• Installs easily and plugs into a
standard 120V outlet
Fits in tight spaces
• Built-In Safety Switch
Designed to light only inside the duct
• E-Z Lamp Replacement
Simple twist and lock
CIRCUIT BOARD MODELS
UV-12C, UV-18C, UV-28C,
UV-12HPC, UV-18HPC,
UV-28HPC
• Electronically monitors lamp life
• Audible and visual lamp replacement alerts
• Can wire into the thermostat to extend
lamp life
24 VOLT MODEL
UV-16/24
• 24V Plug-in Transformer Included
No electrician required
• Compact Design
Fits in tight spaces
• Built-In Safety Switch
Designed to light only inside the duct
• E-Z Lamp Replacement
Simple twist and lock
• Can link to existing security system
• Includes all features of standard models
• All UV-HPC (heatpump) models are 240V
All units are UL listed.
For maximum square footage and other details, see the Models and Specifications table.
Unique Features
ANGLE BRACKET WITH SWIVEL ARM
• Angle allows longer lamps to fit into smaller ductwork,
maximizing effectiveness
IMPROVED LAMP OUTPUT
• Technical enhancement improves
intensity output over the life of the lamp
• Ensures the entire cross section of the duct is irradiated
• Swivel arm allows for easy lamp replacement
• Patented
CIRCUIT BOARD TECHNOLOGY
• Monitors performance and lamp life
• Audible and visual lamp replacement alerts
• Can link with existing security system
• Can wire into the thermostat circuit
DUCT BOARD MOUNTING KIT
• Makes mounting to duct board simple
• Designed to increase stability on the
duct board
6
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Air Purification System
(Portable Models)
UV-500C PORTABLE MODEL
• Uses UV germicidal light, carbon, and high efficiency filtration
• Quiet fan with three speed control
• Purifies air in areas up to 500 square feet
• Circuit board monitors lamp and filter life
• Visual lamp and filter replacement alerts
• Plugs into any standard 120V outlet
UV-500C Features
Built-in handles
1
2
3
4
5
6
7
4
5
10”x10” high-efficiency/carbon filter
8” germicidal UV lamp
Adjustable fan control
Visual lamp and filter condition alert
Heavy-duty fan
3
1
6
Rubber feet
2
Replacement Kit
• 4 high-efficiency/
carbon filters
7
• 1 UV lamp
UV-1500C PORTABLE/WALL/CEILING MODEL
• Purifies air in areas up to 1500 square feet
• Sits on the floor, hangs on the wall, or installs in drop ceiling
• Built-in fan with adjustable speed control
• Circuit board technology monitors lamp life
• Audible and visual lamp replacement alerts
• Plugs into any standard 120V outlet
• Uses UV germicidal light, carbon, and high efficiency filtration
1
UV-1500C Features
1
2
3
4
5
6
7
8
Recessed handle
2
Carbon filter
12” germicidal UV lamp
Adjustable fan control
Visual and audible lamp condition alert
Heavy-duty fan
3
4
5
12” x 12” high-efficiency/carbon filter
Rubber feet
6
Replacement Kit
• 1 carbon filter
• 4 high-efficiency/
carbon filters
7
8
Drop ceiling installation
• 1 UV lamp
7
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Air Purification System
Independent Lab Testing
For many years, ultraviolet light has proven effective in
sterilizing medical equipment, purifying water, and
processing food. Currently, the use of UV lights is
gaining industry acceptance in HVAC applications.
Microbe Management, Inc., a testing agency in
Greenville, NC, has conducted three separate tests to
examine UV’s effect on indoor air quality. The test
results conclude that UV is an integral part of a whole
house approach to improving Indoor Air Quality.
Attack the Source
While experts disagree on the root causes of many IAQ
problems, there is consensus that stopping problems at
the source is crucial to long-term air quality
improvement. First, the homeowner must
eliminate any unwanted sources of
moisture in the home, such as roof
leaks, drainage problems, and crawl
space moisture.
The air conditioning coil must be addressed since it is a
natural breeding ground for molds, which thrive in a
dark, moist environment. Familiar with the rank smell
generated when switching from air
conditioning to heat mode? That is the
smell of mold and bio-film burning off
the coil. Whenever the blower is
engaged, mold spores from
contaminated A-coils are released
into the ductwork and distributed
throughout the building. These spores
then seek alternative surfaces in other
parts of the home to breed and multiply.
Note: Crawl space moisture can
be addressed with the EL-1
Eliminator Foundation Vent Fan.
EL-1 Eliminator
Foundation Vent Fan
Surface Test: UV Kills and Prevents Mold on A-Coils
A specific test was designed to determine UV’s
unabated on the
side without UV.
Subsequently, the
contaminated side
was bathed in UV
light and the
effectiveness in treating mold on coil surfaces. The
test simulated the damp, dark settings where A-coils
are found.
In this study “We took a standard A-coil, sterilized it,
introduced two kinds of mold, and then placed it in a
controlled, moisture-laden environment,” says Bernard
Kane, of Microbe Management. “We created two separate
chambers in our lab. One chamber was bathed in UV
light. The other was not.”
mold was
eradicated. Kane
summarized the
results: “Properly
positioning a UV lamp
Surface Test Results
over the A-coil in a residential or commercial air
conditioning system can eliminate surface mold on the
coil and prevent future mold growth as well.”
The results were dramatic and conclusive. The side of the
A-coil that was exposed to the ultraviolet light was clean
and clear of mold growth. Mold continued to grow
Airborne Testing: Single Pass and Cumulative Tests
Bacteria and viruses are introduced into the building by
its occupants and often cannot be controlled at the
source. Therefore, it is important to attack these
airborne invaders early and often, before they have an
opportunity to multiply. The single pass test proves that
UV effectively kills these airborne microorganisms in
the duct.
Since HVAC systems typically re-circulate the air 40-75
times per day, a multi-pass, cumulative test was also
conducted. Results demonstrate that repeated, multi-
pass exposure to UV light dramatically reduces the
concentration of bacteria and viruses throughout
the home.1
1.
Efficiency of Bacterial Disinfection by a Duct-mounted UV-Aire® Air Purifier: by Microbe Management
8
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Air Purification System
Single Pass Test: UV Deadly for Airborne Microbes
This study introduced a common bacterium into a
galvanized air duct equipped with a UV light to
determine how effective the lamp would be in reducing
the bacteria with one exposure, or a “single pass.” The
tests were conducted at two speeds: 1125 cfm and
2250 cfm in an 18” x 18” duct. The UV lamp yielded at
least a 90% reduction of the test bacteria with a single
airflow pass at 1125 cfm, and at least 71% reduction at
2250 cfm.
Cumulative Tests: Multiple Exposures Dramatically Improve IAQ
To further investigate the effectiveness of UV on indoor
air quality, Microbe Management created a series of
tests designed to measure the cumulative effect of UV in
reducing airborne contaminants. The tests were
performed in a structure with two isolated 8’ x 8’ x 8’
rooms where air could be sampled. In the control room,
no UV was present, while the
was reduced by 50% in just 10 minutes and by 98%
within 30 minutes. In the control room, without UV, more
than 85% of the bacteria were still active after thirty
minutes.” Similarly, the leading consumer UV “tower”
model was also tested, but showed only minimal
effectiveness. (See chart below.)
other room utilized a portable
UV air purifier.
According to Bernard Kane,
Ph. D., of Microbe Management,
“Test results were very
encouraging. In both rooms, we
introduced a resistant, spore-
forming bacteria until the air was
saturated with 350 colonies per
cubic foot. In the room with the
portable UV unit, the spore count
Conclusion: UV Is An Effective Part of “Whole House” Solution
A-coil irradiation, single pass, and cumulative tests
confirm that UV is an important and effective contributor
to a healthier home environment. UV technology used
with a quality filter (MERV rated 8 or higher) will
dramatically improve Indoor Air Quality. Additionally,
portable units can be used in combination with in-duct
models. This combination is strongly recommended for
individuals with depressed immune systems, asthma,
allergies, or other respiratory conditions. For homes
without forced-air, portable UV air purifiers are
recommended to enhance IAQ. Also, health care
professionals, teachers, and day-care workers can
benefit from additional UV protection from influenza
and other viruses.
9
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Air Purification System
UV Energy Required To Kill Bacteria
Correlating The Lab Test With Other Bacteria
Most, if not all bacteria can be destroyed by the
use of UV light. The main factors in disinfection are
the amount of UV power the lamp produces and
the length of time the bacteria is exposed to the UV
light source.
Use the chart below to estimate the effectiveness of
the UV-Aire with other bacteria.
Harder–to–kill bacteria and molds require greater
energy or exposure time to be as effective. For
example, 99% reduction of Rotavirus requires
24,000 µW-sec/cm2 of UV energy versus 6,600
µW-sec/cm2 for Influenza virus (see table below).
This means that Rotavirus spores are five times
more resistant than Influenza. Consequently, spores
will require five times the UV output energy from
the lamp or five times greater exposure time. For
practical purposes, we recommend trapping the
spores in a high efficiency filter downstream of the
UV-Aire which can be irradiated continuously with
the UV-Aire lamp.
The energy required to kill microorganisms is a
product of the UV light’s intensity and exposure
time. This energy is measured in microwatt seconds
per square centimeter.
Intensity x Exposure Time = microWatt seconds/cm2
Table 1 lists the amount of UV energy (measured in
µW-sec/cm2) necessary to destroy various bacteria.
Independent lab testing of the UV-Aire shows that
in a single-pass air flow test, one 18-inch UV-Aire
lamp can reduce levels of Serratia Marcescens (a
typical bacteria) by 93%, while a two lamp system
can reduce by 99%.1
For details of the lab test ask for form number 4291.
1. Efficiency of Bacterial Disinfection by a Duct-mounted UV-Aire® Air Purifier: by
Microbe Management
The calculated average UV energy output levels of
a single UV-Aire lamp in an 18-inch square duct is
2,608 µW-sec/cm2 and 6,186 µW-sec/cm2 for a
two lamp system. The 6,186 is comparable to the
99% energy required for Serratia Marcescens. It
can be seen that there is a direct correlation
between the UV-Aire UV lamp output and the
observed kill rates in the lab.
Bird Flu Virus (Avian Flu)
The Bird Flu Virus is a type of Influenza. Since the kill rate
for the influenza virus is 6,600 microwatts of UV energy, it is
reasonable to conclude that the Bird Flu virus can be
reduced or eliminated by 6,600-10,000 microwatts.
Lamp Intensity
Distance Intensity
from Lamp Factor
Distance Intensity
from Lamp Factor
UV dose required for the de-activation of various microbes
Bacteria
Serratia Marcescens
Legionnella bozemanii
Legionnella micdadei
Mycobacterium tuberculosis
Salmonella enteritidis
Salmonella typhi (Typhoid Fever)
Streptococcus hemolyticus
Virus
UV Dose
Mold
Aspergillus amstelodami
Mucor Mucedo
Penicillium chrysogenum
Yeast
UV Dose
0
1"
354
127
69
15"
20"
6
4
6,160
77,000
2"
25"
3
3,500
77,000
4"
32
30"
2
3,100
56,000
6"
20
35"
1.4
1
10,000
7,600
UV Dose
8,000
8"
14
39.97"
Baker's Yeast
10"
14
7,000
Brewer's Yeast
13,200
UV lamp intensity is rated at a distance of
one meter. To determine the intensity of
ultraviolet radiation at different distances
from the lamp, multiply the intensity of the
lamp by the intensity factor shown in the
models and specifications chart.
5,500
UV dose is measured in microwatt
seconds per centimeter squared
(µW-sec/cm2). The information
presented is intended to give the reader
a general idea of how UV disinfects,
based upon various credible resources.
We do not guarantee its accuracy in
any way.
UV Dose
4,500
Adeno Virus Type III
Infectious Hepatitis
Influenza
8,000
Example: To determine the ultraviolet
intensity of the UV-18 at a distance of six
inches, multiply 73 by 20 to yield 1460
µW-sec/cm2.
6,600
Rotavirus
24,000
10
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Air Purification System
Installation
1. Insert the unit downstream from an A-coil in the
supply plenum or downstream from the air filter in
the return plenum.
Mount base on duct
Return Air
Plenum
using the enclosed
mounting screws.
Supply Air
Plenum
2. Insert lamp through
hole. Place bracket
over end of tube and
tighten wing nut.
Best
Location
A-Coil
Optional
Location
3. Replace cover on unit
and tighten
ALWAYS wear protective goggles to shield your eyes from UV
damage when installing the UV-Aire.
side screw.
UV-C can break down plastic material that is not UV
resistant. Based on lab tests, positioning the lamp 30 inches
or more away from plastic surfaces such as flex duct, drain
pans, etc. will prevent any measurable break down.
4. Plug into 120V outlet
& place rocker switch in “ON” position.
5. Switch will illuminate & blue glow can be seen
through view port when unit is operating properly.
Installation Options
The UV-Aire can be installed in ducts nine
inches and larger. Each unit comes with a
duct board mounting kit and a patent-
pending angle bracket. A dual lamp model
is available for commercial applications
and/or increased potency. There is also a
model designed specifically for heat pumps
and a model for outdoor installations.
Good
Better
16"
Duct
16"
Duct
12"
18"
Good: Standard Installation
Better: Patented Angled Installation -
Single Lamp
Best
Best: Two Angled Lamps or
Two Lamps Perpendicular
18"
20"
Duct
Note: When multiple lamps are
16"
Duct
used, spacing between lamps
should be at least four inches.
Angle option allows longer
lamps to fit in smaller ducts.
18"
18"
18"
11
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Models & Specifications
Minimum
Duct Width
Circuit Recommended Lamp Intensity at Product
Max. Sq. Ft. 1 meter µW/cm2 Warranty
Board
no
no
no
no
no
no
no
no
no
yes
yes
yes
yes
yes
yes
no
yes
yes
no
no
-
Model
Voltage
120
120
120
Amps
0.5
0.5
1.1
Hz Watts
60 30
60 30
60 60
60 30
60 30
60 60
60 30
60 30
60 60
60 30
60 30
60 60
60 30
60 30
60 60
60 60
60 36
60 30
60 30
60 30
60 35
UV-12
9
14
22
9
1500
2000
3000
1500
2000
3000
1500
2000
3000
1500
2000
3000
1500
2000
3000
4000
500
37
73
5 yr
5 yr
5 yr
5 yr
5 yr
5 yr
5 yr
5 yr
5 yr
1 yr
1 yr
1 yr
1 yr
1 yr
1 yr
5 yr
1 yr
1 yr
5 yr
5 yr
1 yr
UV-18
UV-28
105
37
UV-12E**
UV-18E**
UV-28E**
UV-12HP
UV-18HP
UV-28HP
UV-12C
120/208/240 0.5
120/208/240 0.5
120/208/240 1.1
14
22
9
73
105
37
240
240
240
120
120
120
240
240
240
120
120
120
120
24
0.5
0.5
1.1
0.5
0.5
1.1
0.5
0.5
1.1
1.0
0.4
0.5
0.5
1.3
0.6
14
22
9
73
105
37
UV-18C
14
22
9
73
UV-28C
105
37
UV-12HPC
UV-18HPC
UV-28HPC
UV-18X*
UV-500C
UV-1500C
UV-16/120
UV-16/24
EL-1***
14
22
14
NA
NA
16
16
73
105
2@73
24
1500
2000
2000
1000
37
62
62
Fits any crawl
space vent
120
-
Humidity
Switch
EDH-1***
12
@120
-
-
-
-
-
1 yr
max
*
**
UV-18X includes two lamps.
UV-E series includes aluminum NEMA 3 enclosures for external, outdoor installation.
*** The EL-1 Eliminator and the EDH-1 De-Humidistat are not UV-Aire products but are recommended
to help control and reduce moisture and moisture related problems in crawl spaces.
Note: All lamps are warranted for 90 days after installation. A UV-Aire counter display is
available. For more information, contact Field Controls.
Replacement Parts
UV-1500C Replacement Kit
•1 carbon filter
•4 high-efficiency/
carbon filters
UV-500C Replacement Kit
•4 high-efficiency/
carbon filters
UV-Aire Germicidal Lamps
•8", 12", 16", 18" and 28"
•1 UV lamp
•1 UV lamp
UV-1500C Filter Pack
•1 carbon filter
•4 high-efficiency/
carbon filters
UV-500C Filter Pack
•4 high-efficiency/
carbon filters
•A one year supply
•A one year supply
It is important that lamps be replaced when the ultraviolet output falls below minimum requirements for protection.
Even though a lamp will appear to be operating effectively because it still maintains the visible blue glow, the
ultraviolet output will be significantly reduced after 9000 hours of use. To maintain maximum benefits,
lamps should be replaced annually.
©2007 Field Controls
form# 4283
Printed in U.S.A.(CP07)
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