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The Dome Store >
Skylights and Windows
> Skylight and Window Glass Performance
Skylight and Window Glass Performance
Natural Spaces Skylight Performance Data (glass portion only) |
Glass type & color |
% Daylight
Transmitted |
U-Value
Winter |
R-Value
Center of Glass |
Relative Heat
Gain BTU/hr/sf |
% UV
Blocked |
Clear double pane |
81% |
0.48 |
2.04 |
182 |
36% |
Bronze tint dbl pane |
53% |
0.48 |
2.04 |
135 |
68% |
Grey tint dbl pane |
45% |
0.48 |
2.04 |
131 |
62% |
Solarcool (mirror)grey,dbl #2 |
16% |
0.48 |
2.08 |
85 |
93% |
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Clear dbl pane Low-E #3 |
73% |
0.34 |
2.86 |
167 |
50% |
Bronze tint dbl pane Low-E #3 |
44% |
0.34 |
2.86 |
115 |
77% |
Grey tint dbl pane Low-E #3 |
37% |
0.34 |
2.86 |
111 |
73% |
Solarcool (mirror) gry, dbl, Low-E #3 |
14% |
0.34 |
2.94 |
63 |
96% |
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Clear dbl pane Low-E #3 Argon |
73% |
0.29 |
3.33 |
167 |
50% |
Bronze tint dbl pane Low-E #3 Argon |
44% |
0.29 |
3.33 |
115 |
77% |
Grey tint dbl pane Low-E #3 Argon |
37% |
0.29 |
3.33 |
111 |
73% |
Solarcool (mirror) gry, dbl, Low-E #3 Argon |
14% |
0.29 |
3.33 |
63 |
96% |
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Clear dbl, 2 layers, Low-E, Argon |
|
0.27 |
3.70 |
|
|
|
|
|
|
|
|
Clear triple pane |
65% |
0.29 |
3.45 |
145 |
|
Bronze tint triple pane |
37% |
0.29 |
3.45 |
96 |
|
Grey tint triple pane |
29% |
0.29 |
3.45 |
92 |
|
Solarcool mirror triple pane #2 |
12% |
0.27 |
3.70 |
59 |
|
|
|
|
|
|
|
Clear triple, Low-E #5 Argon |
57% |
0.21 |
4.76 |
99 |
|
Bronze, triple, Low-E #5 Argon |
32% |
0.21 |
4.76 |
67 |
|
Grey, triple, Low-E #5 Argon |
27% |
0.21 |
4.76 |
63 |
|
Clear, triple, 2 Low-E Argon |
|
0.16 |
6.25 |
|
|
|
|
|
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Marvin Windows Performance Data (Casement) |
Glass type & color |
% Visable Light
Transmitted |
U-Value
(total unit) |
R-Value
(total unit) |
Solar Heat
Gain Coefficient |
|
Clear dbl, Low-E 2, Argon 3/4" I.G. |
48% |
0.35 |
2.70 |
.30 |
|
Triple, High-R, Low-E 2, Krypton |
38% |
0.27 |
3.70 |
.26 |
|
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VELUX Roof Windows and Skylight Performance Data |
Glass type & color |
% Visable Light
Transmitted |
U-Value
(total unit) |
R-Value
(total unit) |
Solar Heat
Gain Coefficient |
% UV
Blocked |
VSE Units: Clear dbl, Low-E 2, Argon |
|
|
|
|
|
Comfort-Tempered |
44% |
0.40 |
2.50 |
.29 |
87% |
ComfortPlus-Laminated |
43% |
0.41 |
2.44 |
.29 |
99.9% |
|
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|
|
|
FS Units: Clear dbl, Low-E 2, Argon |
|
|
|
|
|
Comfort-Tempered |
44% |
0.37 |
2.70 |
.29 |
87% |
ComfortPlus-Laminated |
43% |
0.41 |
2.44 |
.29 |
99.9% |
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37955 Bridge Road
North Branch, MN 55056, USA
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