CLTDs for sunlighted walls for north latitudes
From ASHRAE (1989), with permission
Values shown for Group C 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 |
14 |
13 |
12 |
11 |
10 |
9 |
8 |
8 |
7 |
7 |
8 |
8 |
9 |
10 |
12 |
13 |
14 |
15 |
16 |
17 |
17 |
17 |
16 |
22 |
7 |
17 |
10 |
NE |
19 |
17 |
16 |
14 |
13 |
11 |
10 |
10 |
11 |
13 |
15 |
17 |
19 |
20 |
21 |
22 |
22 |
23 |
23 |
23 |
23 |
22 |
21 |
20 |
20 |
10 |
23 |
13 |
E |
22 |
21 |
19 |
17 |
15 |
14 |
12 |
12 |
14 |
16 |
19 |
22 |
25 |
27 |
29 |
29 |
30 |
30 |
30 |
29 |
28 |
27 |
26 |
24 |
18 |
12 |
30 |
18 |
SE |
22 |
21 |
19 |
17 |
15 |
14 |
12 |
12 |
12 |
13 |
16 |
19 |
22 |
24 |
26 |
28 |
29 |
29 |
29 |
29 |
28 |
27 |
26 |
24 |
19 |
12 |
29 |
17 |
S |
21 |
19 |
18 |
16 |
15 |
13 |
12 |
10 |
9 |
9 |
9 |
10 |
11 |
14 |
17 |
20 |
22 |
24 |
25 |
26 |
25 |
25 |
24 |
22 |
20 |
9 |
26 |
17 |
SW |
29 |
27 |
25 |
22 |
20 |
18 |
16 |
15 |
13 |
12 |
11 |
11 |
11 |
13 |
15 |
18 |
22 |
26 |
29 |
32 |
33 |
33 |
32 |
31 |
22 |
11 |
33 |
22 |
W |
31 |
29 |
27 |
25 |
22 |
20 |
18 |
16 |
14 |
13 |
12 |
12 |
12 |
13 |
14 |
16 |
20 |
24 |
29 |
32 |
35 |
35 |
35 |
33 |
22 |
12 |
35 |
23 |
NW |
25 |
23 |
21 |
20 |
18 |
16 |
14 |
13 |
11 |
10 |
10 |
10 |
10 |
11 |
12 |
13 |
15 |
18 |
22 |
25 |
27 |
27 |
27 |
26 |
22 |
10 |
27 |
17 |