Case/Condition

ALBANY

MIAMI

SEATTLE

Mean air change rate (h^-1)

Percent of hours < 0.25 h^-1

Percent of hours < 0.35 h^-1

Mean air change rate (h^-1)

Percent of hours < 0.25 h^-1

Percent of hours < 0.35 h^-1

Mean air change rate (h^-1)

Percent of hours < 0.25 h^-1

Percent of hours < 0.35 h^-1

1/Envelope leakage only

0.23

55

87

0.09

100

100

0.20

72

99

2/Scheduled exhaust fans

0.30

43

70

0.18

79

87

0.28

57

79

3/Forced-air operating on outdoor temperature

0.37

29

48

0.20

76

86

0.35

27

64

4A/Intake on forced-air, operating on outdoor temperature

0.40

27

41

0.21

73

86

0.37

24

54

4B/Intake on forced-air, occupancy schedule

0.72

0

0

0.67

0

0

0.69

0

0

5A/Passive inlets and whole house exhaust on exhaust schedule

0.45

24

38

0.28

68

78

0.43

18

46

5B/Passive inlets and whole house exhaust on occupancy schedule

0.58

7

18

0.40

28

61

0.56

2

12

6A/ Whole house exhaust (no inlets) on exhaust schedule

0.41

29

47

0.25

76

79

0.39

27

64

6B/ Whole house exhaust (no inlets) on occupancy schedule

0.54

10

21

0.38

36

68

0.52

4

14