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Part 5: Specifi cations
VELUX solar collector
Measurements (inches)
Gross
Frame
Glass
Aperture
Absorber
Packaging
Technical specifi cations
Weight (lbs.)
Collector area (sq. ft.)
Fluid volume (gal.)
Max operating pressure (psi)
Test pressure (psi)
Stagnation temperature (°F)
Thermal performance rating - warm climate (1000s btu/day)
Thermal performance rating - cool climate (1000s btu/day)
Effi ciency
32 – Part 5: Specifi cations –
Width
Code
U12
S06
S
54.1
46.2
W
52.8
44.9
I
51.5
43.6
E
49.5
41.6
K
49.8
41.9
-
56.1
48.2
VELUX solar collector
Height
M08
Code
U12
32.0
T
72.0
30.7
H
70.7
29.4
J
69.4
27.4
F
67.4
27.8
L
67.7
34.0
-
73.2
Collector weight
Weight w/fl uid
Gross area
Aperture area
Absorber area
Clear day
Mildly cloudy day
Cloudy day
Clear day
Mildly cloudy day
Cloudy day
eta0 (start effi ciency)
a1 (Btu/hr*ft2*°F)
a2 (Btu/hr*ft2*°F2)
Depth
S06
M08
All
47.5
56.2
3.9
46.2
54.8
44.9
53.5
42.9
51.6
43.2
51.9
48.7
57.4
4.1
U12
S06
M08
130
73
57
141
79
64
27.1
15.2
12.5
23.1
12.4
9.8
23.4
12.6
10.0
0.58
0.34
0.24
87
87
87
145
145
145
374
374
365
29
15
12
20
11
8
11
6
5
19
10
8
11
6
4
4
2
1
0.6960
0.6610
0.6390
0.4747
0.4666
0.4603
0.0020
0.0019
0.0018
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