TAB Journal Summer 2020 - 10

2.	Change AHU filters to MERV-13 or higher if possible.
3.	 Run system(s) 24/7 if possible or as long as possible if 24/7
operation is not possible. Run units on minimum outside air
during unoccupied periods.

Table I below shows the measures taken and possible
assistance to be provided by TAB agencies:

Action Taken

Possible TAB
Assistance

4.	Add portable room AC units with HEPA or >/= MERV-13
filters with consideration to clean air delivery rate (more on
this later).

1. Increase outside air
quantity to 100 percent
or as much as possible.

5.	 Add duct- or unit-mounted, upper room, and/or portable
ultraviolet germicidal irradiation (UVGI) devices in
connection to in-room fans in high-density spaces.

*	Measure and verify
outside air quantity.
*	Verify proper damper
position & control.

2. Improve central & other
filtration to >/= MERV-13.

*	Determine filter
performance effects
on MERV-13 AHU
performance.
*	Establish new clean/dirty
filter differential pressure
(2x initial).
*	Perform new unit test w/
flow characteristics, coil,
fan, motor performance.

6.	Maintain room temperature and relative humidity as
applicable to the infectious aerosol of concern.
7.	 Bypass energy recovery ventilator systems that can leak
potentially contaminated exhaust air back into the outdoor
air supply.
8.	Design and build inherent capabilities to respond to
emerging threats and plan and practice for them.
With the information gleaned from ASHRAE and CDC, the
leadership took the following measures in order to begin using
the sanctuary spaces for corporate worship:
1.	 Open outdoor air dampers to allow for 100 percent or
maximum outside air to be introduced to the space.
2.	Install MERV-13 filters in all units.
3.	 Procure and install UVGI and ionization units in the
AHU's.
4.	Run HVAC systems 24/7 prior to occupancy. Flush areas
with 100 percent outside air for at least two hours before
and two hours after occupancy.
5.	 Install high-wall mount UV light units in restrooms.
You may question why the UVGI plus ionization in units with
MERV-13 filters? ASHRAE's Systems states that MERV-13
filters remove 


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TAB Journal Summer 2020

Table of Contents for the Digital Edition of TAB Journal Summer 2020

TAB Journal Summer 2020 - Cover1
TAB Journal Summer 2020 - Cover2
TAB Journal Summer 2020 - 1
TAB Journal Summer 2020 - 2
TAB Journal Summer 2020 - 3
TAB Journal Summer 2020 - 4
TAB Journal Summer 2020 - 5
TAB Journal Summer 2020 - 6
TAB Journal Summer 2020 - 7
TAB Journal Summer 2020 - 8
TAB Journal Summer 2020 - 9
TAB Journal Summer 2020 - 10
TAB Journal Summer 2020 - 11
TAB Journal Summer 2020 - 12
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TAB Journal Summer 2020 - 14
TAB Journal Summer 2020 - 15
TAB Journal Summer 2020 - 16
TAB Journal Summer 2020 - 17
TAB Journal Summer 2020 - 18
TAB Journal Summer 2020 - 19
TAB Journal Summer 2020 - 20
TAB Journal Summer 2020 - Cover3
TAB Journal Summer 2020 - Cover4
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