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Ionization Vs. Ultraviolet Light
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Which is the preferred technology
Bi-Polar Ionization vs. Ultraviolet Light

The chart below facilitates an easy comparison of both technologies. UVC has been aggressively promoted in the commercial and residential sector to control mold and bacteria in ducts and air handlers. However, the advertising fails to explain that UVC is a “line of sight” device. If the blue UVC light fails to shine on the airborne microorganism and transfer a given amount of radiant energy, it has 0% efficiency in killing microorganisms. As a result, UVC mounted downstream of a cooling coil is not capable of sanitizing deep within the coil. Conversely, bi-polar ionization is not a line of sight device. Ionization mounted upstream of a cooling coil travels down the duct cleaning the entire cooling coil and killing mold and bacteria along its path. Odors and gases produced from building furnishings, bacteria, mildew and mold are controlled in the process.

Bi-polar ionization has been used for over forty years. Bi-polar ionization is principally used in commercial and industrial applications such as hospitals, schools, waste water treatment plants, airports, and casinos.

Which is the Preferred Technology?
 
Bi-Polar Ionization
Ultraviolet Light
Temperature Range
0° F – 130° F
55° F – 135° F
Air Velocity Limits
100 fpm – 800 fpm
< 500 fpm
Tube Life (hours)
~32,000
~8,000 – 9,000
Extended Operating Range
Yes
No - Line of sight
Zone Purification
Yes
No - Cooling coil only
Odor Control
Yes
No
Kills Bacteria
Yes
Yes
Deactivates Mold
Yes
Yes
Safe Operation
Yes
No - Retina damage/skin cancer
Easy Installation
Yes
No - Requires duct support
Extended Maintenance Cycle
Yes - Annual cleaning with detergent
No - Monthly cleaning with alcohol
Annual Operating Cost $/CFM
$0.012
$0.033
Deteriorates Duct Insulation
No
Yes