June 99
TABLE 2.2
Degree-Days
Wall "U"
Glass "U"/SC
ROOF "U"
Floor
"U"
3000 & Below
0.27(0.13) 2.3(1.13)/0.6
0.10(.05) 0.24(0.12)
-----------------------------------------
3001 to 5000
0.20(0.10) 1.02(0.5)/0.5
0.10(.05) 0.20(0.10)
-----------------------------------------
5001 & Above
0.14(0.07) 1.02(0.5)/0.33
0.06(.03) 0.16(0.08)
-----------------------------------------
Notes:
1.
The degree days are based on heating season
below 18C (65F) outside temperature in
accordance with the ASHRAE Handbooks of
Fundamentals and Systems.
2.
The SCs of the glass windows are based on the
intrinsic property of the glass material only, that is,
without any assistance from external shading
devices, such as, venetian blinds.
The "U" values are expressed as W/m2/C
3.
(BTUH/HR/Ft2/F).
4.
The "U" values for floors are for floors of heated
spaces over unheated areas, such as,
sub-basements (pipe basements), garages, crawl
spaces, etc. The requirements of insulation for
the slabs-on-grade for the heated spaces are
shown under perimeter insulation.
B.
PERIMETER INSULATION: For heated occupied
spaces, thermally isolate the slabs-on-grade by
providing perimeter insulation on the interior for the
foundation walls. The requirements are listed in Table
2.3.
VA Design Guide -- National Cemetery Administration
Page 5 -55
Previous Page
