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Presentation on theme: "ISB Indoor Air Quality"— Presentation transcript:
Slide1
ISB Indoor Air Quality
Past, Present, & Future
ACAMIS Leadership Conference
March
2016
Slide2
Essential Questions
What was ISB’s Indoor Air Quality (IAQ) program prior to 2013?
What data was collected in 2013 to help guide facilities and IAQ projects?
What projects were completed over summer break of 2013?
Results?
What projects were
completed during summer 2014? Results?
What are the future plans?
Slide3
ISB Indoor Air Quality
Prior to 2013
ISB did not have a regular IAQ testing program
F-9 Filters were in place on all Air-Handling Units (AHU)
Building and stairwells were negatively pressurized
Outdoor air pressure > Indoor air pressure
Many windows opened to the outside
Slide4
ISB Indoor Air Quality
Data collected in 2013
Indoor Air Quality measured three times daily (9 AM, 1 PM, and 4 PM)
24 different locations at ISB
+
Outdoor
Tracked for one month (Feb.-March)
Measures were put in place to minimize “bad air” intrusion and flow
Limited door access on “bad air” days
Closed hallway fire door and stairwell doors
Slide5
ISB Indoor Air Quality
Findings
Filtration system worked relatively well
“Bad air” intrusion created challenges
Some readings near building entrances and stairwells above target of below 100 AQI
Especially at 9 AM – Mass influx of people
Some areas of the school had consistently higher readings
Issues with building envelope (windows, doors, seals)
Slide6
ISB Indoor Air Quality
Projects completed Summer 2013
Replacement of 34 Air Handling Units
Upgraded filters - three (G-4, F-8, H-14)
Increased capacity by 30%
All fresh-air units replaced
Pressurization of 8 building entrances
Pressurization of building stairwells
Removal of all windows that open and non-essential doors
Slide7
ISB Indoor Air Quality
Projects completed for Summer 2014
Replacement of 24 Air Handling Units (AHU) that circulate and filter return air
These AHU provide air to the larger spaces at ISB like the gyms, pools, libraries, etc.
Pressurize additional entrances
Continue to “balance” the new system
Balance
a
ir
f
low and temperature
Computerized system controls
Slide8
New Air Handlers
Slide9
Entrance Renovation
Slide10
ISB Indoor Air Quality
Usage
Class
Performance
Primary filters
G1 – G4
65
%-90%
Secondary filters
F5 – F9
40%–95%
Semi
HEPA
H10
85%
H11
95%
H12
99.5%
HEPA
H13
99.95%
H14
99.995%
Slide11
ISB Indoor Air Quality
P
re-filter(G4
), medium
filter(F8) and HEPA
filter (H14
)
G4 filters are washable.
W
ashed
and reused once before
replacement -- Replaced monthly
F8 filters are not
washable
Replaced
every
1-2months
H14 filters are not
washable
R
eplaced
every
6-8 months
Slide12
ISB Indoor Air Quality
Filter
replacement frequency
varies, tied
to the
average pollution level
Filter Cost: V
ary
due to
AHU size
G4:
RMB 45
to 90/piece
F8:
RMB 100-155/piece
H14:
RMB 270-520/piece
ISB’s annual filter expense
RMB900,000 annually
Slide13
ISB Indoor Air Quality
Data Results – August 2014
All AQI readings school-wide under 30
Many classroom readings below 10
Large spaces at similar levels to classrooms
Any relatively high reading (50 AQI or more) generally linked to:
Poor installation of filters, equipment
Activities inside the classroom (science labs, cleaning, etc.)
Slide14
Future Plans
Continue to test indoor air when outdoor AQI is above 150
50+ measurement points on campus
Verifies the proper function of equipment
Identifies any problem areas for review
Maintenance of equipment and regular filter changes
