The homeowner and contractor shall confirm the
location of all roof and ground mounted components
in advance of the installation.
Collector Orientation
The performance of solar water heating systems
in the Northern Hemisphere is optimized when
the collector is mounted facing True South.
Performance, however, suffers very little when the
collector is oriented no more than 45° East or West
of True South. The collector should be unshaded
by any permanent obstacle between 9:00 a.m. and
3:00 p.m. on any day of the year.
Collector Tilt
Optimal annual efficiency is achieved by tilting the
solar collector at an angle that equals your latitude
plus an additional 10°. This tilt angle favors the
lower winter sun when collector performance is at
it’s lowest and minimizes overheating during the
hottest summer months.
The solar collectors in a two collector staggered
mount installation must be spaced far enough apart
to prevent winter shading. Table 1 shows the correct
spacing between collectors to prevent shading on
December 21, when the sun is at its lowest angle.
LATITUDE
25°N
30°N
35°N
40°N
45°N
50°N
COLL. TILT
35°
40°
45°
50°
55°
60°
A
B
A
B
A
B
A
B
A
B
A
B
FLAT
29
96
33
113
37
145
41
145
44
145
48
145
5°
1/12
25
83
29
93
33
113
37
132
41
133
44
141
9°
2/12
22
74
26
82
30
77
34
110
38
115
41
118
14°
3/12
17
66
22
72
26
82
30
92
34
95
38
98
18°
4/12
14
61
18
66
22
74
26
82
30
85
34
87
ROOF
23°
5/12
10
58
14
60
18
66
22
72
26
74
30
77
PITCH
27°
6/12
7
58
11
58
15
61
19
66
23
68
27
70
30°
7/12
4
58
8
58
13
58
17
62
21
65
25
66
34°
8/12
0
58
5
58
9
58
13
58
17
60
22
62
37°
9/12
0
58
3
58
7
58
11
58
15
58
19
58
40°
10/12
0
58
0
58
4
58
8
58
13
58
17
58
43°
11/12
0
58
0
58
2
58
6
58
10
58
14
58
45°
12/12
0
58
0
58
0
58
4
58
8
58
13
58
DIMENSIONS A AND B ARE DESIGNATED IN INCHES
TABLE 1
Installing the System
10
Figure 1 - Reverse Pitch Mounting
Figure 2 - Side Pitch Mounting
Figure 3 - Staggered Mount Collector Spacing
Installation Requirements - Specific
