CLTDs for sunlighted walls for north latitudes

From ASHRAE (1989), with permission

Values shown for Group G walls

Wall facing

Solar time, h

Hour of Max. CLTD

Min. CLTD

Max. CLTD

Max. - Min. CLTD

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

N

3

2

1

0

-1

2

7

8

9

12

15

18

21

23

24

24

25

26

22

15

11

9

7

5

18

-1

26

27

NE

3

2

1

0

-1

9

27

36

39

35

30

26

26

27

27

26

25

22

18

14

11

9

7

5

9

-1

39

40

E

4

2

1

0

-1

11

31

47

54

55

50

40

33

31

30

29

27

24

19

15

12

10

8

6

10

-1

55

56

SE

4

2

1

0

-1

5

18

32

42

49

51

48

42

36

32

30

27

24

19

15

12

10

8

6

11

-1

51

52

S

4

2

1

0

-1

0

1

5

12

22

31

39

45

46

43

37

31

25

20

15

12

10

8

5

14

-1

46

47

SW

5

4

3

1

0

0

2

5

8

12

16

26

38

50

59

63

61

52

37

24

17

13

10

8

16

0

63

63

W

6

5

3

2

1

1

2

5

8

11

15

19

27

41

56

67

72

67

48

29

20

15

11

8

17

1

72

71

NW

5

3

2

1

0

0

2

5

8

11

15

18

21

27

37

47

55

55

41

25

17

13

10

7

18

0

55

55