CLTDs for sunlighted walls for north latitudes

From ASHRAE (1989), with permission

Values shown for Group F 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

8

6

5

3

2

1

2

4

6

7

9

11

14

17

19

21

22

23

24

23

20

16

13

11

19

1

23

23

NE

9

7

5

3

2

1

5

14

23

28

30

29

28

27

27

27

27

26

24

22

19

16

13

11

11

1

30

29

E

10

7

6

4

3

2

6

17

28

38

44

45

43

39

36

34

32

30

27

24

21

17

15

12

12

2

45

43

SE

10

7

6

4

3

2

4

10

19

28

36

41

43

42

39

36

34

31

28

25

21

18

15

12

13

2

43

41

S

10

8

6

4

3

2

1

1

3

7

13

20

27

34

38

39

38

35

31

26

22

18

15

12

16

1

39

38

SW

15

11

9

6

5

3

2

2

4

5

8

11

17

26

35

44

50

53

52

45

37

28

23

18

18

2

53

48

W

17

13

10

7

5

4

3

3

4

6

8

11

14

20

28

39

49

57

60

54

43

34

27

21

19

3

60

57

NW

14

10

8

6

4

3

2

2

3

5

8

10

13

15

21

27

35

42

46

43

35

28

22

18

19

2

46

44