CLTDs for sunlighted walls for north latitudes
From ASHRAE (1989), with permission
Values shown for Group D 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 |
15 |
13 |
12 |
10 |
9 |
7 |
6 |
6 |
6 |
6 |
6 |
7 |
8 |
10 |
12 |
13 |
15 |
17 |
18 |
19 |
19 |
19 |
18 |
16 |
21 |
6 |
19 |
13 |
NE |
17 |
15 |
13 |
11 |
10 |
8 |
7 |
8 |
10 |
14 |
17 |
20 |
22 |
23 |
23 |
24 |
24 |
25 |
25 |
24 |
23 |
22 |
20 |
18 |
19 |
7 |
25 |
18 |
E |
19 |
17 |
15 |
13 |
11 |
9 |
8 |
9 |
12 |
17 |
22 |
27 |
30 |
32 |
33 |
33 |
32 |
32 |
31 |
30 |
28 |
26 |
24 |
22 |
16 |
8 |
33 |
25 |
SE |
20 |
17 |
15 |
13 |
11 |
10 |
8 |
8 |
10 |
13 |
17 |
22 |
26 |
29 |
31 |
32 |
32 |
32 |
31 |
30 |
28 |
26 |
24 |
22 |
17 |
8 |
32 |
24 |
S |
19 |
17 |
15 |
13 |
11 |
9 |
8 |
7 |
6 |
6 |
7 |
9 |
12 |
16 |
20 |
24 |
27 |
29 |
29 |
29 |
27 |
26 |
24 |
22 |
19 |
6 |
29 |
23 |
SW |
28 |
25 |
22 |
19 |
16 |
14 |
12 |
10 |
9 |
8 |
8 |
8 |
10 |
12 |
16 |
21 |
27 |
32 |
36 |
38 |
38 |
37 |
34 |
31 |
21 |
8 |
38 |
30 |
W |
31 |
27 |
24 |
21 |
18 |
15 |
13 |
11 |
10 |
9 |
9 |
9 |
10 |
11 |
14 |
18 |
24 |
30 |
36 |
40 |
41 |
40 |
38 |
34 |
21 |
9 |
41 |
32 |
NW |
25 |
22 |
19 |
17 |
14 |
12 |
10 |
9 |
8 |
7 |
7 |
8 |
9 |
10 |
12 |
14 |
18 |
22 |
27 |
31 |
32 |
32 |
30 |
27 |
22 |
7 |
32 |
25 |