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Healthy Indoor Environments. David W. Bearg, PE, CIH June 4, 2003 Greening the Government Conference, Philadelphia, PA. HEALTHY INDOOR ENVIRONMENT: ABSENCE OF IAQ PROBLEMS. IAQ PROBLEMS ARISE WHEN SOMETHING GOES WRONG! EITHER INADEQUATE VENTILATION, PRESENCE OF AIR CONTAMINANTS, OR BOTH. - PowerPoint PPT Presentation
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Healthy Indoor Environments David W. Bearg, PE, CIH June 4, 2003 Greening the Government Conference,
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Page 1: Healthy Indoor Environments

Healthy Indoor Environments

David W. Bearg, PE, CIHJune 4, 2003

Greening the Government Conference, Philadelphia, PA

Page 2: Healthy Indoor Environments

HEALTHY INDOOR ENVIRONMENT:ABSENCE OF IAQ PROBLEMS

IAQ PROBLEMS ARISE WHEN SOMETHING GOES WRONG!

EITHER INADEQUATE VENTILATION, PRESENCE OF

AIR CONTAMINANTS, OR BOTH

Page 3: Healthy Indoor Environments

HEALTHY INDOOR ENVIRONMENT: ADEQUACY OF VENTILATION

IF THE HVAC SYSTEM ISN’T PERFORMING AS INTENDED, YOU COULD BE UNDERVENTILATING IN PARTS OF YOUR BUILDING, AND

JEOPARDIZING THE PRODUCTIVITY OF THE WORKERS THERE.

Page 4: Healthy Indoor Environments

HEALTHY INDOOR ENVIRONMENT:ADEQUACY OF VENTILATION

WHAT’S NEEDED IS OPERATIONAL FEEDBACK ON

THE AMOUNT OF OUTDOOR AIR FOR VENTILATION ACTUALLY

BEING PROVIDED TO THE BUILDING OCCUPANTS

Page 5: Healthy Indoor Environments

HEALTHY INDOOR ENVIRONMENT:OPERATIONAL FEEDBACK ON

PERFORMANCE

MONITORING

LEED IEQ CREDIT #1: PERMANENT CARBON DIOXIDE

(CO2) MONITORING SYSTEM.

Page 6: Healthy Indoor Environments

HEALTHY INDOOR ENVIRONMENT:LEED IEQ CREDIT 1

Intent: Provide capacity for indoor air quality (IAQ) monitoring to help sustain long-term

occupant comfort and well-being.

Requirements: Install a permanent carbon dioxide (CO2) monitoring system that provides operational adjustments.

Page 7: Healthy Indoor Environments

HEALTHY INDOOR ENVIRONMENT:OPERATIONAL FEEDBACK ON

PERFORMANCE

MONITORING

ASTM D 6245-98 Standard Guide for Using Indoor Carbon Dioxide

Concentrations to Evaluate Indoor Air Quality and Ventilation

Page 8: Healthy Indoor Environments

HEALTHY INDOOR ENVIRONMENT:OPERATIONAL FEEDBACK ON

PERFORMANCE

MONITORING

INFORMATION MANAGEMENT APPLIED TO THE OPERATION OF

THE BUILDING AND ITS HVAC SYSTEMS.

Page 9: Healthy Indoor Environments

300

500

700

900

1100

1300

1500

1700

1900

2100

0 2 4 6 8 10 12 14 16 18 20 22 0

Outdoor Air

Return Air

Room 112

Room 108

Room 115

Room 111

Room 107

Room 178

Room 105

CO2 ppm

TIME of DAY

IAQ DATAGRAPH MONITORED OFFICE BUILDING "CS" Locations served by AHU #2, July 2, 1997

Page 10: Healthy Indoor Environments

FEDERAL OFFICE BUILDINGMay 14, 1996

300

400

500

600

700

800

900

1000

0 2 4 6 8 10 12 14 16 18 20 22 0TIME OF DAY

CO2 PPM

AHU-13 Return

AHU-13 Supply

Outdoor Air AHU-13

Agency A

Agency M

Agency C

Agency N

Agency D

Agency E

IDENTIFICATION OFNON-UNIFORM DISTRIBUTION

Page 11: Healthy Indoor Environments

FEDERAL OFFICE BUILDINGMay 21, 1996

300

400

500

600

700

800

900

1000

0 2 4 6 8 10 12 14 16 18 20 22 0

TIME OF DAY

CO2 PPM

AHU-13 Return

AHU-13 Supply

Outdoor Air AHU-13

Agency A

Agency M

Agency C

Agency N

Agency D

Agency E

DOCUMENTATION OFACHIEVEMENT OF UNIFORMVENTILATION DISTRIBUTION

Page 12: Healthy Indoor Environments

300

400

500

600

700

800

900

1000

1100

0 2 4 6 8 10 12 14 16 18 20 22 0TIME OF DAY

CO2 PPM

AHU-13 ReturnAHU-13 SupplyOutdoor Air AHU-13Agency AAgency MAgency CAgency NAgency DAgency E

c.

Page 13: Healthy Indoor Environments

FEDERAL OFFICE BUILDINGApril 23, 1996

300

400

500

600

700

800

900

0 2 4 6 8 10 12 14 16 18 20 22 0

TIME OF DAY

CO2 PPM

Outdoor Air-HR

Agency A

Agency M

Agency C

Agency N

Agency D

Agency E

IDENTIFICATION OFRE-ENTRAINMENT

Page 14: Healthy Indoor Environments

20.0%

30.0%

40.0%

50.0%

60.0%

70.0%

80.0%

90.0%

100.0%

8:45

:38

9:23

:42

10:0

1:43

10:3

9:45

11:1

7:48

11:5

5:49

12:3

3:53

13:1

1:58

13:5

0:02

14:2

8:07

15:0

6:10

15:4

4:11

16:2

2:16

AHU-4 AHU-5 AHU-6 AHU-8

OUTDOOR AIR PERCENTAGES

Page 15: Healthy Indoor Environments

HEALTHY INDOOR ENVIRONMENT:OPERATIONAL FEEDBACK ON

PERFORMANCE

MONITORING CAN BE USED FOR DIAGNOSTICS,

CONTROL, OR BOTH

Page 16: Healthy Indoor Environments

HEALTHY INDOOR ENVIRONMENT:MONITORING COSTS

AS MENTIONED BEFORE, PRODUCTIVITY GAINS CAN EXCEED ENERGY COSTS WITH INCREASED

VENTILATION. IN ONE INSTALLATION, MONITORING COST

$0.20/SF IN 250,000 SF BUILDING

Page 17: Healthy Indoor Environments

HEALTHY INDOOR ENVIRONMENT:NO AIR CONTAMINANTS PRESENT

PARTICULATES VOCs

MOLD (MOISTURE) CARBON MONOXIDE

Page 18: Healthy Indoor Environments

HEALTHY INDOOR ENVIRONMENT:POTENTIAL FOR MOLDS

LIMITING FACTOR IN THE GROWTH OF MOLDS INDOORS

IS MOISTURE

Page 19: Healthy Indoor Environments

COLLEGE Student CenterOctober 17, 1995

28

30

32

34

36

38

40

42

44

46

48

50

0 2 4 6 8 10 12 14 16 18 20 22 0

TIME OF DAY

DEWPOINT TEMPERATURE

DEG. F

Roof O/A

Room 325-B

Room 340

Room 300-B

Danielson-B

Faculty Dining

Student Activities

M&C Services

Room 1986

Counseling

Student Affairs Conf.

Career Services

Student Affairs Off.

Bookstore

Comp. Lab-CIS

Comp. Lab-SCPS

E&F Learning Ctr.

Student Gov. Assoc.

Student Union Soc.

Game Room

Lower Cafeteria

Tavern

Ground O/A

Page 20: Healthy Indoor Environments

THE NEW ENGLANDApril 4, 1996

0

5

10

15

20

25

30

0 2 4 6 8 10 12 14 16 18 20 22 0

TIME OF DAY

DEWPOINT TEMPERATURE DEG. F

Outside Air

7 West (S-15)

6 South (S-16)

6 East (S-19)

9 East (S-21)

2 North (S-23)

Cafeteria

4 South (S-16)

10 West (S-15)

9 West (S-15)

8 West (S-15)

6 West (S-15)

5 West (S-15)

4 West (S-15)

Return (R-15)

3 East (S-19)

Return (R-19)

7 Core (S-21)

4 East (S-21)

3 West (S-3)

13-V (R-3-S)

SB-Loading Dock

SB-W Garage

Page 21: Healthy Indoor Environments

FEDERAL OFFICE BUILDINGJune 13, 1996

53

58

63

68

0 2 4 6 8 10 12 14 16 18 20 22 0

TIME OF DAY

AHU-13 Return

Loading Dock

Auditorium

Agency J

AHU-13 Supply

Agency F

Agency K

Cafeteria

Outdoor Air AHU-13

Agency H

Computer Room

Agency L

Agency O

Agency I

DEWPOINT TEMPERATURE DEG. F

INFILTRATION INTO AUDITORIUM

Page 22: Healthy Indoor Environments

Bunker Hill Community College

0

10

20

30

40

50

0 2 4 6 8 10 12 14 16 18 20 22 0

TIME of DAY

OA AC-1 (A)OA AC-3 (B)OA AC-4 (B)OA AC-6 (B)OA AC-7 (D)OA AC-9 (D)OA AC-10 (C)OA AC-1 (E)OA AC-3 (E)OA AC-5 (E)OA AC-8 (E)OA AC-9 (E)BookstoreCafe-WestLibrarySPLCE-175AuditoriumLecture HallB-301B-325B-333B-336B-213B-217B-221B-104B-109B-114B-118B-125B-127B-129B-133B-135D-310D-314D-317D-209D-213D-217D-101D-111D-113D-115D-118D-120

December 22, 1998

Outdoor WeatherCan Quickly AffectIndoor Air Quality

Exhibit 1-a

Dew Point Temperature

Degrees F

Page 23: Healthy Indoor Environments

Stratus Computer, June 19, 1995

48

53

58

63

68

0 2 4 6 8 10 12 14 16 18 20 22 0

TIME OF DAY

DEWPOINT TEMPERATURE

DEG. F

O/A - Roof

O/A - Ground

RTU-1 Supply

RTU-1 Return

RTU-2 Supply

RTU-2 Return

R-2003

MS Lab

R-2498

R-2568

R-2600

R-2359

R-2122

R-2223

R-2077

R-2238

R-2639

R-1006

LAB # 5

Lab #3

Lab #8

DOCK

Lab #7

Page 24: Healthy Indoor Environments

HEALTHY INDOOR ENVIRONMENT:NO AIR CONTAMINANTS PRESENT

CARBON MONOXIDE

FROM LOWER LEVEL PARKING

AREAS, LOADING DOCKS,

OR NEARBY TRAFFIC

Page 25: Healthy Indoor Environments

02468

1012141618202224262830

0 2 4 6 8 10 12 14 16 18 20 22 0

TIME OF DAY

CO ppm

Outside Air

7 West (S-15)

6 South (S-16)

6 East (S-19)

2 North (S-23)

Cafeteria

4 South (S-16)

4 West (S-15)

3 East (S-19)

4 East (S-21)

3 West (S-3)

13-V (R-3-S)

SB-Loading Dock

SB-West Garage

Office Building Carbon Monoxide on May 2, 1997

Page 26: Healthy Indoor Environments

IDENTIFICATION OF IMPACT COMPANY "ABC" OF VEHICLE EXHAUST March 10, 1994

300

400

500

600

700

800

900

1000

0 2 4 6 8 10 12 14 16 18 20 22 0

TIME OF DAY

5th Bullpen

AHU1 OA

AHU5 OA

AHU5 Ret

3rd Flr Trn

4th Flr Frnt

3rd Flr Frnt

AHU3 OA

Cafeteria

Page 27: Healthy Indoor Environments

Bunker Hill Community College

300

400

500

600

700

800

900

1000

1100

0 2 4 6 8 10 12 14 16 18 20 22 0

TIME of DAY

CO2 ppm

OA AC-1 (A)OA AC-3 (B)OA AC-4 (B)OA AC-6 (B)OA AC-7 (D)OA AC-9 (D)OA AC-10 (C)OA AC-1 (E)OA AC-3 (E)OA AC-5 (E)OA AC-8 (E)OA AC-9 (E)BookstoreCafe-WestLibrarySPLCR/A, AC-1(E)Self-paced CenterAuditoriumLecture HallB-301B-329B-333B-336B-213B-217B-221B-104B-109B-114B-118B-125B-127B-129B-133B-135D-310D-314D-317D-209D-213D-217D-101D-111D-113D-115D-118D-120

Nearby Exhaust Sometimes Only Affects Morning

Ventilation

Exhibit 2-a

November 19, 1998

Page 28: Healthy Indoor Environments

Bunker Hill Community College

0

1

2

3

4

5

6

0 2 4 6 8 10 12 14 16 18 20 22 0

TIME of DAY

Carbon Monoxideppm

OA AC-1 (A)OA AC-3 (B)OA AC-4 (B)OA AC-6 (B)OA AC-7 (D)OA AC-9 (D)OA AC-10 (C)OA AC-1 (E)OA AC-3 (E)OA AC-5 (E)OA AC-8 (E)OA AC-9 (E)BookstoreCafe-WestLibrarySPLCR/A, AC-1(E)Self-paced CenterAuditoriumLecture HallB-301B-329B-333B-336B-213B-217B-221B-104B-109B-114B-118B-125B-127B-129B-133B-135D-310D-314D-317D-209D-213D-217D-101D-111D-113D-115D-118D-120

Nearby Exhaust Sometimes Only Affects Morning Ventilation

Exhibit 2-b

November 19, 1998

Page 29: Healthy Indoor Environments

HEALTHY INDOOR ENVIRONMENT:ADEQUACY OF VENTILATION

WHAT’S NEEDED IS OPERATIONAL FEEDBACK ON

THE AMOUNT OF OUTDOOR AIR FOR VENTILATION ACTUALLY

BEING PROVIDED TO THE BUILDING OCCUPANTS

Page 30: Healthy Indoor Environments

MONITORING FORVENTILATION PERFORMANCE

CAN REDUCE UNCERTAINTY & RISK IN THE OPERATION OF BUILDINGS

CAN IMPROVE DIAGNOSIS AND MANAGEMENT OF HVAC OPERATION

CAN INCREASE ABILITY OF ACHIEVING MORE OPTIMUM PERFORMANCE, CONSISTENT WITH GOALS FOR BOTH MAXIMAL IAQ & ENERGY EFFICIENCY


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