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SUN CONTROL


SUN CONTROL
EXETER ARCHITECTURAL PRODUCTS
contracted a nationally known, independent testing laboratory to determine the Shading Coefficient of STORM SHIELD™ HURRICANE BARRIERS and the effect installation of the barriers would have on solar heat gain.

The testing determined the Shading Coefficient of STORM SHIELD to be .51. (The Shading Coefficient represents the percentage of solar heat gain that is transmitted to the interior of a structure through the glass and shading system. The Shading Coefficient for clear glass is 1.) This means, for a given opening, solar heat gain is reduced by almost 50%.

Reducing the solar heat gain is a practical method for saving energy. For example,just sixty square feet of glass can admit as much as 12,000 BTU of heat each hour, requiring one extra ton of air condition*. By installing STORM SHIELD™ HURRICANE BARRIERS over the existing glass, the amount of solar heat being introduced through the opening is reduced by almost 50%.

The following chart represents the solar heat gain for 1/8” clear glass (ASHRAE reference glazing) and 1/8” clear glass protected by a STORM SHIELD™ HURRICANE BARRIER. Conditions were simulated for July 21st in Miami, Florida for East, West and South facing openings.

Clear Sky Solar Heat Gain - Miami, Florida

Time
of Day

East Surface
BTU/hr.ft2

South Surface
BTU/hr.ft2
West Surface
BTU/hr.ft2
AST 1/8"
Clear
with
STORM SHIELD
1/8"
Clear
with
STORM SHIELD
1/8"
Clear
with
STORM SHIELD

7 AM
8 AM
9 AM
10 AM
11 AM
NOON
1 PM
2 PM
3 PM
4 PM
5 PM
6 PM

193
215
195
149
83
43
39
36
32
26
18
7

98
109
100
76
42
22
20
18
16
13
9
3

18
27
34
40
47
50
47
40
34
27
18
7

9
14
17
21
24
26
24
21
17
14
9
3

18
26
32
36
39
43
83
149
195
215
193
91


9
13
16
18
20
22
42
76
100
109
98
46

• East Facing - 8 A.M.,Miami, Florida
• Time is given in Apparent Solar Time
• 1/8" Clear = 1/8" clear ASHRAE reference glazing
• W/STORM SHIELD is 1/8" clear glass with STORM SHIELD barrier on the outside
• Testing and Data supplied by Tait Solar Co., Inc., Tempe, Arizona


Clear Sky Solar Heat Gain - Miami, Florida Chart

Clear Sky Solar Heat Gain Reduction
July 21st, East Facing Vertical Surface

Clear Sky Solar Heat Gain Reduction
July 21st, West Facing Vertical Surface

Clear Sky Solar Heat Gain Reduction
July 21st, South Facing Vertical Surface


940 Industry Road, Suite 7, Building B, Kenner, LA 70062-6895
Phone: 570-693-4220     Fax: 570-693-2575

Toll Free: 800-213-2575

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