MIL-HDBK-1003/19
APPENDIX C
WORKSHEET 2
Estimation of Net Load Coefficient
SPECIFIED DESIGN PARAMETERS
Total external perimeter:
Pt = _______
Ground floor area:
Ag = _______
Ground floor perimeter:
Pg = _______
Roof area (horizontal projection):
Ar = _______
South wall area:
As = _______
NOTE: As includes windows and solar apertures.
Ceiling height:
h
= _______
Nonsouth window fraction:
NSF
= _______
Number of glazings in nonsouth windows:
NGLn = _______
Air changes per hour:
ACH
= _______
Air density ratio (see figure 24):
ADR
= _______
CALCULATED DESIGN PARAMETERS
Nonsouth window area:
An = [Pt [multiplied by] h) - As] NSF = _______
Wall area:
Aw = (Pt [multiplied by] h) - Ac - An NSF = _______
NOTE:
Aw is the total area of all external walls
excluding windows and solar apertures.
NET LOAD COEFFICIENTS
Walls:
LCw = 24 Aw/RWALL = _______
Nonsouth windows:
LCn = 26 An/NGLn = _______
Perimeter (slab on grade):
LCp = 100 P /(RPERIM + 5) = _______
g
Pick
One Basement (heated):
LCb = 256 Pg/(RBASE + 8) = _______
Floor (over vented crawl space):
LCf = 24 Ag/RFLOOR = _______
Roof:
LCr = 24 Ar/RROOF = _______
Infiltration:
LCi = 0.432
(ACH [multiplied by] ADR [multiplied by] h [multiplied by] Af) = _______
TOTAL:
NLC = LCw + LCn + (LCp or LCb or LCf) + LCr + LCi = _______
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