Ultraviolet (UV)-generated ozone is an affordable option that’s becoming more popular for residential applications.
In addition, a growing number of service technicians are
supplementing both UV and corona discharge (CD)-generated ozone
with UV sanitation, a separate process that uses certain
wavelengths of light to break down the molecular structure of many
“I use a little chlorine to maintain a sanitizer residual,
ozone to oxidize the contaminants in the water, and UV to keep
microbes under control,” says Steve Kenney, owner of SRK
Pools in East Hampton, N.Y.
“The three of them together are a really powerful combination.”
It can be easy to confuse UV-generated ozone with UV sanitation, so
here are a few helpful points of difference:
Nature of effect
UV ozone generators use invisible light waves to free oxygen atoms
(O) from oxygen molecules (O2), allowing them to join
into ozone molecules (O3), which are powerful oxidizers.
UV sanitizers send similar light waves directly into the
pool’s water, breaking down the molecular composition of
microorganisms and other contaminants — but produce no
Area of effect
UV ozone generators create a concentration of ozone molecules in
the air that passes through their central chamber, then disperse
bubbles of ozone-packed air into the pool’s water. UV
sanitizers send light waves directly into the water that circulates
through their central chamber, then pass that partially sanitized
water back out into the pool’s circulation system.
Speed of effect
UV-generated ozone destroys contaminants much quicker than chlorine
does; it typically takes 30 minutes or less to destroy more than 99
percent of many microorganisms. UV sanitizers achieve a similar
level of microorganism destruction upon initial