Data for effective leakage areas of building components at 0.016 in WG

From ASHRAE, 1989, with permission

Component Units

Best estimate

Maximum

Minimum

Sill foundation-Wall Caulked in2/ft of perimeter

0.04

0.06

0.02

Not caulked in2/ft of perimeter

0.19

0.19

0.05

Joints between ceiling and walls Joints (only if not taped or plastered and no vapor barrier) in2/ft of wall

0.07

0.12

0.02

Windows Casement Weather-stripped in2/ft2 of window

0.011

0.017

0.006

Not weather-stripped in2/ft2 of window

0.023

0.034

0.011

Awning Weather-stripped in2/ft2 of window

0.011

0.017

0.006

Not weather-stripped in2/ft2 of window

0.023

0.034

0.011

Single-hung Weather-stripped in2/ft2 of window

0.032

0.042

0.026

Not weather-stripped in2/ft2 of window

0.063

0.083

0.052

Double-hung Weather-stripped in2/ft2 of window

0.043

0.063

0.023

Not weather-stripped in2/ft2 of window

0.086

0.126

0.046

Single-slider Weather-stripped in2/ft2 of window

0.026

0.039

0.013

Not weather-stripped in2/ft2 of window

0.052

0.077

0.026

Double-slider Weather-stripped in2/ft2 of window

0.037

0.054

0.02

Not weather-stripped in2/ft2 of window

0.074

0.011

0.04

Component Units

Best estimate

Maximum

Minimum

Doors Single door Weather-stripped in2/ft2 of door

0.114

0.215

0.043

Not weather-stripped in2/ft2 of door

0.157

0.243

0.086

Double door Weather-stripped in2/ft2 of door

0.114

0.215

0.043

Not weather-stripped in2/ft2 of door

0.16

0.32

0.1

Access to attic or crawl space Weather-stripped in2 per access

2.8

2.8

1.2

Not weather-stripped in2 per access

4.6

4.6

1.6

Wall-Window frame Wood frame wall Caulked in2/ft2 of window

0.004

0.007

0.004

No caulking in2/ft2 of window

0.024

0.038

0.022

Masonry wall Caulked in2/ft2 of window

0.019

0.03

0.016

No caulking in2/ft2 of window

0.093

0.15

0.082

Wall-Door frame Wood wall Caulked in2/ft2 of door

0.004

0.004

0.001

No caulking in2/ft2 of door

0.024

0.024

0.009

Masonry wall Caulked in2/ft2 of door

0.0143

0.0143

0.004

No caulking in2/ft2 of door

0.072

0.072

0.024

Component Units

Best estimate

Maximum

Minimum

Domestic hot water systems Gas water heater (only if in conditioned space) in2

3.1

3.9

2.325

Electric outlets and light fixtures Electric outlets and switches Gasketed in2 per outlet and switch

0

0

0

Not gasketed in2 per outlet and switch

0.076

0.16

0

Recessed light fixtures in2 per fixture

1.6

3.1

1.6

Pipe and duct penetrations through envelope Pipes Caulked or sealed in2 per pipe

0.155

0.31

0

Not caulked or sealed in2 per pipe

9.3

1.55

0.31

Ducts Sealed or with continuous vapor barrier in2 per duct

0.25

0.25

0

Unsealed and without vapor barrier in2 per duct

3.7

3.7

2.2

Fireplace Without insert Damper closed, in2 per fireplace

10.7

13

8.4

Damper open in2 per fireplace

54

59

50

With insert Damper closed in2 per fireplace

5.6

7.1

4.03

Damper open or absent in2 per fireplace

10

14

6.2

Component Units

Best estimate

Maximum

Minimum

Exhaust fans Kitchen fan Damper closed, in2 per fan

0.775

1.1

0.47

Damper open in2 per fan

6

6.5

5.6

Bathroom fan Damper closed in2 per fan

1.7

1.9

1.6

Damper open in2 per fan

3.1

3.4

2.8

Dryer vent Damper closed in2 per vent

0.47

0.9

0

Heating ducts and furnace

Forced-air systems

Ductwork (only if in unconditioned space) Joints taped or caulked in2 per house

11

11

5

Joints not taped or caulked in2 per house

22

22

11

Furnace (only if in conditioned space) Sealed combustion furnace in2 per furnace

0

0

0

Retention head burner furnace in2 per furnace

5

6.2

3.1

Retention head plus stack damper in2 per furnace

3.7

4.6

2.8

Furnace with stack damper in2 per furnace

4.6

6.2

3.1

Air conditioner Wall or window unit in2 per unit

3.7

5.6

0