ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 8

Airflow

F
I
L
T
E
R

Approx.
15-18"
apart

C
O
O
L
I
N
G

Approx.
36-40"
apart

C
O
I
L

Airflow

UV-C lights

Approx.
15-18"
apart

C
O
O
L
I
N
G

F
I
L
T
E
R

Airflow

C
O
I
L

UV-C lights

UV safe filter

C
O
O
L
I
N
G

F
I
L
T
E
R

Approx.
36-40"
apart

C
O
I
L

UV safe filter

UV-C lights

FIGURE 4. Options for UV-fi xture placement in an air handler. Left: downstream of a coil for coil/surface
cleaning, with fi xtures spaced on 36- to 40-in. centerlines. Middle: upstream of a coil for air-stream
disinfection (treatment also can be installed downstream). Right: dual application, with more tightly spaced
UV-C lamps upstream of a coil for air-stream disinfection and less UV-C intensity downstream of the coil for
coil/surface cleaning.

temperature of 55°F to the typical upstream temperature

Germicidal UV has been extensively researched and

of 70°F can increase lamp output by up to 40 percent

is recognized in two ASHRAE Handbook volumes, HVAC

(figures 4 and 5).

Applications12 and Fundamentals16; two ASHRAE test

Cooler temperatures downstream of a coil can be

standards, ANSI/ASHRAE Standard 185.1, Method of

overcome with the use of
FEP-coated lamps and/or

UV upstream of coil
for air-stream disinfection

more lamps.

UV downstream of coil
for coil maintenance

Conclusion
Facility professionals can
utilize germicidal-UV technologies to greatly reduce

Airflow

concentrations of pathogens
in a highly reliable and costeffective fashion.
The UV-C wavelength
can kill 99 percent or more
of all microorganisms living
on H VAC a i r duct s a nd
evaporator coils, depending
UV safe
prefilter

on UV-C intensity, length of
exposure, UV-lamp placement, and lamp life cycle.12

Two cooling
coils stacked

Operating 24/7/365, upper-

Vertical UV-lamp supports
(12 in. off coil)
Fans

room/air germicidal fixtures
can inactivate microbes in

FIGURE 5. UV-C fi xtures installed both upstream and downstream of a cooling coil

under a second.

provide both air-stream disinfection and coil cleaning.

8

2020 A M CA i n m o t i o n

w w w. a m c a .o r g



http://www.amca.org

ASHRAE Journal Supplement - AMCA InMotion - October 2020

Table of Contents for the Digital Edition of ASHRAE Journal Supplement - AMCA InMotion - October 2020

Contents
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - BB1
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - BB2
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - Cover1
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - Cover2
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - Contents
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 2
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 3
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 4
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 5
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 6
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 7
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 8
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 9
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 10
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 11
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 12
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 13
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 14
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 15
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 16
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 17
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 18
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 19
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 20
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 21
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 22
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 23
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 24
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 25
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 26
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 27
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 28
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 29
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 30
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 31
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 32
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 33
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 34
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 35
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 36
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 37
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 38
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 39
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 40
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 41
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 42
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 43
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 44
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - Cover3
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - Cover4
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