MIL-HDBK-1003/19
APPENDIX A
Direct Gain Systems - Continued
SYSTEM NUMBERING CONVENTION
First digit: Mass-area to glazing-area ratio (Am/Ac) (3, 6, or 9)
Second digit: Thermal storage mass thickness (THICK) (2, 4, or 6)
Third digit: R-value of night insulation (0, 4, or 9)
Fourth digit: Number of glazings (NGL) (1, 2, or 3)
System
F
G
Uc [alpha] DHC/Ac EHC/Ac e
Number
6291
0.796
8.50
0.53
0.97
29.88
28.05
1.
6292
0.832
3.70
0.27
0.97
29.88
28.05
1.
6293
0.866
2.02
0.19
0.97
29.88
28.05
1.
6401
1.013
26.74
1.10
0.97
56.76
53.93
1.
6402
1.024
10.66
0.49
0.97
56.76
53.93
1.
6403
1.062
5.86
0.31
0.97
56.76
53.93
1.
6441
0.964
10.18
0.61
0.97
56.76
53.93
1.
6442
0.966
4.42
0.35
0.97
56.76
53.93
1.
6443
1.015
2.50
0.28
0.97
56.76
53.93
1.
6491
0.967
8.26
0.53
0.97
56.76
53.93
1.
6492
0.964
2.74
0.27
0.97
56.76
53.93
1.
6493
1.020
1.30
0.19
0.97
56.76
53.93
1.
6601
1.089
26.98
1.10
0.97
71.58
71.11
1.
6602
1.079
10.42
0.49
0.97
71.58
71.11
1.
6603
1.095
5.38
0.31
0.97
71.58
71.11
1.
6641
1.013
9.94
0.61
0.97
71.58
71.11
1.
6642
1.019
4.18
0.35
0.97
71.58
71.11
1.
6643
1.046
2.02
0.28
0.97
71.58
71.11
1.
6691
1.005
8.02
0.53
0.97
71.58
71.11
1.
6692
0.997
2.26
0.27
0.97
71.58
71.11
1.
6693
1.051
0.82
0.19
0.97
71.58
71.11
1.
9201
0.906
26.43
1.10
0.98
44.82
40.75
1.
9202
0.943
10.83
0.49
0.98
44.82
40.75
1.
9203
0.983
6.03
0.31
0.98
44.82
40.75
1.
9241
0.896
10.35
0.61
0.98
44.82
40.75
1.
9242
0.909
4.83
0.35
0.98
44.82
40.75
1.
9243
0.962
2.91
0.28
0.98
44.82
40.75
1.
9291
0.889
8.43
0.53
0.98
44.82
40.75
1.
9292
0.926
3.39
0.27
0.98
44.82
40.75
1.
9293
0.967
1.71
0.19
0.98
44.82
40.75
1.
9401
1.191
28.11
1.10
0.98
85.14
78.34
1.
9402
1.131
10.59
0.49
0.98
85.14
78.34
1.
9403
1.149
5.55
0.31
0.98
85.14
78.34
1.
9441
1.050
10.11
0.61
0.98
85.14
78.34
1.
9442
1.063
4.35
0.35
0.98
85.14
78.34
1.
9443
1.095
2.19
0.28
0.98
85.14
78.34
1.
86
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