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COMPONENT ARA HEAT 6. BUILDING INSUL- HEAT TRIAL TRIAL TRIAL
OF LOAD GAIN SECTION VALUE GAIN NO. 1 NO.2 NO. 3
R-VALUE
1. Windows Ceilings R-19 -80 48O
"S Single
E Double N4 ../. sq. ft.
NR-11 72-90

R-7
SE
o R-11
SFrame
R-7
S ............
sq. ft. R
R-O

2. Doos Masonry R-7 3 /S
2. Doors / O O/DO
B'Single )4- /^
Mingle sq.ft. R-0
SStorm sq. ft. /R-10 7.3D __, 2 30
3. Number of Floors Over R-19
Occupants Open Spacesa

... .. x 400 o00 .... .. sq. ft. R-11

R-7

4. Appliances .1600 R-0

5. Heat Gain Excluding 7. Heat Gain Through
Building Sections / 1 o4 Building Sections 0 9Sb


I.... Transfer heat gain excluding _
building sections to these three boxes


8A. Maximum allowable heat gain
(FHA only)

12. ESTIMATED ANNUAL COOLING COSTd

Total heat gain
x he tga n ................... *= $ ............ /yr.
100,000 Cooling Index


NOTES
a. Floor heat gain to be calculated only for floors over open spaces,
such as bedrooms over garages. Slab-on-grade floors, floors over
basements, and floors over vented and unvented crawl spaces may
be considered to have no heat gain. In most cases, worksheet entrii
for floors should be omitted.
.b. Multipliers for heat gain to ducts:
Ducts in attic, 1" flexible insulation 1.
Ducts in attic, 2" flexible insulation, 1" rigid
insulation, or 1" fiber glass duct 1.
Ducts in other unconditioned spaces above
grade, 1" flexible insulation 1.4
Ducts in unconditioned spaces below grade,
including unconditioned basements, no duct
insulation 1.1
Ducts in conditioned spaces 1.1


13, rotU


8. Subtotal
Excluding Ducts Z /2.0O -C' S c'o
-------------if----' -- -----
9. Duct Multiplierb

10.TOTAL HEAT GAINc
- To.) S + Z.
11. EQUIPMENT SIZE /, Do

The NAHB Research Foundation, Inc., assumes no responsibility for
the validity of cooling operating cost estimates in relation to actual
costs in specific instances because of the many possible variations in
occupancy, equipment efficiency, living habits, and other factors.

es
c. Total Heat Gain in Step 10 may be reduced 15 per cent if a 4%O F.
15 interior design temperature swing is used or may be reduced 30 per
cent for a 6 F. interior design temperature swing.
10 d. Cooling Index and estimated annual cooling cost assume a
S thermostat setting of 75 F. A thermostat setting of 70 F., for
example, would significantly increase operating cost.


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