ISB Indoor Air Quality PowerPoint Presentation, PPT - DocSlides

ISB Indoor Air Quality

Past, Present, & Future

ACAMIS Leadership Conference

March

2016

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?

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

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

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)

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

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

New Air Handlers

Entrance Renovation

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%

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

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

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.)

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

ISB Indoor Air Quality

Questions or comments?