ENERGY CONSERVATION
INSULATION
| Table of Thermal Properties - Resistance ("R" Values) |
| "R" Values |
Wind
Velocity |
|
Glass Only |
Glass Plus Shutter |
| Slat V |
Slat VM |
| A. Single Glass |
15 mph |
Winter |
0.88 |
|
2.47 |
|
1.76 |
|
| 7.5 mph |
Summer |
|
0.94 |
|
2.53 |
|
1.82 |
| 25 mph |
|
|
|
2.41 |
|
1.71 |
|
B. Double Insulating
Glass (.5" air space) |
15 mph |
Winter |
1.72 |
|
3.31 |
|
2.60 |
|
| 7.5 mph |
Summer |
|
1.78 |
|
3.37 |
|
2.66 |
| 25 mph |
|
|
|
3.27 |
|
2.54 |
|
| C. Single Glass & Storm Window |
15 mph |
Winter |
1.78 |
|
3.37 |
|
2.66 |
|
| 7.5 mph |
Summer |
|
1.85 |
|
3.44 |
|
2.73 |
| 25 mph |
|
|
|
3.31 |
|
2.60 |
|
| D. Triple Glazed Double Hung Window |
15 mph |
Winter |
3.03 |
|
4.54 |
|
3.85 |
|
| 7.5 mph |
Summer |
|
3.12 |
|
4.76 |
|
4.00 |
*"R" Value = F. Degree Temperature Difference Between Inside And Outside Per Square Foot Per BTU Heat Loss Per Hour.
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