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Article: a must-read
UV-C lamp specs
Custom Commercial UV-C systems
For large air conditioning
and chiller applications
Expert tech support
The Original Air Probe
Sanitizer is the Finest Ultraviolet-C Central Air Purification System Available
Anywhere in the
world at any price.
They have been installed in hospitals,
medical facilities, commercial buildings, and homes worldwide to purify, freshen,
and disinfect the air, and
help prevent the spread of antibiotic-resistant diseases by means of the powerful germicidal effect of the intense UV-C
rays and hydroxyl ions generated as a byproduct.
The U.S. Standard for
Government Buildings requires that "Ultraviolet light (C band) emitters/lamps shall be incorporated
downstream of all cooling coils and above all drain pans to control airborne and surface microbial
growth and transfer. Applied fixtures/lamps must be specifically manufactured for this purpose."
The Air Probe Sanitizer meets these requirements, are specifically manufactured for this
purpose, and are
installed in government buildings.
Used by the IRS, Veterans' Hospitals, and many other US
A major manufacturer of
commercial air conditioning systems installs the Original Air Probe Sanitizer UV-C units in their
Specifications and more information on the Air Probe Sanitizer is on the
main UV-C page.
Click here to view a news article about the
benefits and cost savings of a UVC commercial installation.
The video has more details. Click
here to go to the video page.
Typical Air Probe SanitizerTM
HVAC UV lamp system installation in a large commercial building
This is a typical commercial installation of two 10-probe Air Probe Sanitizers (model E-1000). The UV-C
probes are illuminating the large evaporator coil behind, and the air passing through it, with invisible
UV-C germicidal rays. This will keep this coil mold-free and looking brand-new for many years, not
to mention that this coil will never have to be cleaned.
(see other photo below)
Air Probe Sanitizer Ultraviolet-C Purifiers
I determine the number of germicidal ultraviolet-c lamps (probes) needed?"
A. Rather than placing emphasis on CFM or building size,
the determining factors in sizing commercial systems includes the measuring of the
Height and Width
of the evaporator coil (chiller or other AC cooling coil).
For Example, if the cooling coil is four feet wide and six feet high, then an Air
Probe Sanitizer six feet long (with one probe per foot) should be installed as near the center of the
cooling coil's height as possible.
Any cooling coils over four feet in height should require another
Air Probe Sanitizer of equal length
with at least one probe per foot. (UV lamp spacing can be increased
slightly in many new installations in humid areas.)
- The Determining Factors in
Sizing Commercial Building Cooling systems includes the
measuring of the Height and Width of the evaporator coil, rather than placing emphasis on CFM,
building size, or AC tonnage/BTU.
- For example, if the coil is four feet wide
and six feet high, then an Air Probe Sanitizer six feet long (with one probe per foot) should be installed
as near the center of the coil's height as possible.
- Any coils over four feet in height should require
a second unit of equal length with at least one probe per foot.
Using these guidelines ensures a happy customer every time, unless perhaps there's some extreme case
where it is advisable to add more lamps (rarely, if ever). And more lamps (probes) don't hurt a thing,
by the way. It stretches out the time between lamp replacement, and is even more effective at destroying
Commercial units use the standard 8" probes spaced at 12" intervals. In rare cases where
the cooling coil is over a foot thick, or in smoky restaurants, a 6 to 8 inch spacing may work better.
The probes (lamps) should be generally be mounted pointed down (sockets up), nearly
parallel to the evaporator coil, on the cold air side of the coils. Example photos are below.
The most common question we get asked is, How many lamps vs. the square footage of the building being
treated? Even others plainly state that that's just not the way to figure it. Sometimes they have an
airflow CFM rating that they use, but in 99%+ cases, nobody knows that, anyway. Of course, you need
enough lamps to do the job, but it's really simple.
Sizing the number of UV lamps to the dimensions of the evaporator coil kills several birds with one
stone, as the saying goes. Of course, the evaporator coil dimension is somewhat proportional to the
AC tonnage. And you need enough lamps to illuminate the entire coil and condensate pan. To our knowledge,
by using those guidelines, there's never been anyone who wasn't delighted with their air quality improvement
after the installation of the Air Probe Sanitizer.