Making sense of Sun Control Window Film
August 14, 2012 1:39 PM Subscribe
Should Solar/Sun Control Window Film be applied to these windows? I'm trying and failing to make sense of the specifications/numbers...
posted by maya to Home & Garden (6 answers total) 2 users marked this as a favorite
The windows belong to a high rise apartment in sometimes-chilly San Francisco. UV damage and color fading are concerns, as there is dark carpeting, a piano, some leather furniture, and art. Losing heat is a concern, as most windows face North towards the Golden Gate Bridge.
I have tried to research each of the values but have found it difficult- especially when the labels don't match up. I realize that there are qualities of materials in the unit that will affect their durability...
I'm looking for guidance as to the efficacy of this film on these windows- is it a huge improvement, or maybe not worth the expense? Thank you so much.
The windows in question are Solarban 60 (2) Clear + Clear. Specs:
19% Ultra Violet
33% Total Solar Energy
11% Visible Light
29% Total Solar Energy
0.29 Winter Nighttime
0.27 Summer Daytime
0.44 Shading Coefficient
0.38 Solar Heat Gain Coefficient
1.85 LSG (Light to Solar Grain)
Qualities of Clear Sun Control Film that may be purchased and installed:
62% Visible Light Transmitted
44% Total Solar Energy Rejected
50% Total Solar Energy Rejected - On 60degree angle
97% Infrared rejected
13% Visible Light Reflected Int.
15% Visible Light Reflected Ext.
99.9% UV Rejected
22% Glare Reduction
0.56 Solar Heat Grain Coefficient
0.47 U Value
1.1 Luminous Efficacy