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
9491
1.041
8.19
0.53
0.98
85.14
78.34
1.
9492
1.059
2.67
0.27
0.98
85.14
78.34
1.
9493
1.097
0.99
0.19
0.98
85.14
78.34
1.
9601
1.268
28.35
1.10
0.98
107.37
103.29
1.
9602
1.200
10.59
0.49
0.98
107.37
103.29
1.
9603
1.220
5.55
0.31
0.98
107.37
103.29
1.
9641
1.113
10.11
0.61
0.98
107.37
103.29
1.
9642
1.093
3.87
0.35
0.98
107.37
103.29
1.
9643
1.143
1.95
0.28
0.98
107.37
103.29
1.
9691
1.088
7.95
0.53
0.98
107.37
103.29
1.
9692
1.088
2.19
0.27
0.98
107.37
103.29
1.
9693
1.088
2.19
0.27
0.98
107.37
103.29
1.
87
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