CLTDs for sunlighted walls for north latitudes
From ASHRAE (1989), with permission
Values shown for Group A 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 |
14 |
14 |
14 |
13 |
13 |
13 |
12 |
12 |
11 |
11 |
10 |
10 |
10 |
10 |
10 |
10 |
11 |
11 |
12 |
12 |
13 |
13 |
14 |
14 |
2 |
10 |
14 |
4 |
NE |
19 |
19 |
19 |
18 |
17 |
17 |
16 |
15 |
15 |
15 |
15 |
15 |
16 |
16 |
17 |
18 |
18 |
18 |
19 |
19 |
20 |
20 |
20 |
20 |
22 |
15 |
20 |
5 |
E |
24 |
24 |
23 |
23 |
22 |
21 |
20 |
19 |
19 |
18 |
19 |
19 |
20 |
21 |
22 |
23 |
24 |
24 |
25 |
25 |
25 |
25 |
25 |
25 |
22 |
18 |
25 |
7 |
SE |
24 |
23 |
23 |
22 |
21 |
20 |
20 |
19 |
18 |
18 |
18 |
18 |
18 |
19 |
20 |
21 |
22 |
23 |
23 |
24 |
24 |
24 |
24 |
24 |
22 |
18 |
24 |
6 |
S |
20 |
20 |
19 |
19 |
18 |
18 |
17 |
16 |
16 |
15 |
14 |
14 |
14 |
14 |
14 |
15 |
16 |
17 |
18 |
19 |
19 |
20 |
20 |
20 |
23 |
14 |
20 |
6 |
SW |
25 |
25 |
25 |
24 |
24 |
23 |
22 |
21 |
20 |
19 |
19 |
18 |
17 |
17 |
17 |
17 |
18 |
19 |
20 |
22 |
23 |
24 |
25 |
25 |
24 |
17 |
25 |
8 |
W |
27 |
27 |
26 |
26 |
25 |
24 |
24 |
23 |
22 |
21 |
20 |
19 |
19 |
18 |
18 |
18 |
18 |
19 |
20 |
22 |
23 |
25 |
26 |
26 |
1 |
18 |
27 |
9 |
NW |
21 |
21 |
21 |
20 |
20 |
19 |
19 |
18 |
17 |
16 |
16 |
15 |
15 |
14 |
14 |
14 |
15 |
15 |
16 |
17 |
18 |
19 |
20 |
21 |
1 |
14 |
21 |
7 |