3M Sun Control
Window Film Specification Guide
As a leader in both adhesive and film
technologies, 3M brings together these disciplines to
create the finest products available for residential,
commercial and government buildings.
Our films reduce up to 99% of the sun's
ultraviolet rays and reject up to 79% of the solar heat
that may otherwise come through a window.
3M Sun Control Films save energy, as
well as helping to protect furnishings, carpets, woodwork
and artwork from destructive ultraviolet rays that cause
fading.
How to use this guide
Key Property Quick Reference
The three values indicated
below are the key to getting an overall feel for any
window film. These values have been highlighted in the
specification data tables for convenient quick reference.
Note that in the data tables there is a Visible Light
Reflected value for both the interior surface of the
glass and the exterior surface of the glass.
Glass Properties
The Glass Properties table presents
properties for the four basic glass configurations with
no film attached. This table can be useful as a point
of reference when comparing properties from the window
film tables. In the window film tables you will find
properties for the films attached to each of these types
of glass configurations.
Your local 3M Licensed Installer can
offer you support and provide samples to assist you
in your film selection. Before finalising a film specification
for a project please contact your local 3M Licensed
Installer to ensure that the preferred product is suitable
for your particular application.
Glass Properties
Prestige Series Films
Prestige Series are a spectrally selective, non-metallised,
solar control range of films designed to give exceptionally
low reflectivity and an optimized balance of performance
and natural light. Prestige Series uses a whole new
technology in the reflection of radiant energy, the
multi-layer optical film. This film consists of over
200 layers that bend and reflect light, progressively
reflecting off the unwanted wavelengths (Infrared) while
allowing natural light to pass through (see illustration
to the right). This unique design gives increased performance
when the sun is at an angle to your glass in the hottest
parts of the day. Therefore, Total Solar Energy Rejected
figures are reported at a 60° angle in the data
table.
One of the standout features of the
Prestige Series window films is that they are not metallised.
No metal means no corrosion and no mobile phone signal
interference. It also gives the Prestige Series superior
clarity. Prestige Series films block 97% of Infrared
heat and 99.9% of Ultraviolet radiation, providing increased
comfort and safety.
Night Vision Films
Night Vision Films offer a strong combination
of attractive tones, low or high reflectivity, variable
light transmissions and high performance sun control
features. The warm, natural hues invite warmth and beauty
to any room. The Night Vision series utilise unique
patented 3M carbon pigment technology that enhances
the colour stability in the films.
Classic Films
The Classic Films deliver a wide range
of solar heat reduction properties, glare control features,
variable light transmissions and reflectivity levels
with UV protection for use in commercial and residential
applications. The Classic range includes Silver, Black,
Amber and Low Emissivity to provide a wide selection
of films that vary in colour, shades and price.
Warranty and Maintenance
When installed by a 3M Licensed Installer,
3M Window Films are backed with a comprehensive warranty
of up to 15 years for Commercial and a limited lifetime
warranty for Residential applications. 3M Window Films
can be cleaned using the same non-abrasive cleaning
methods as are used on normal glass.
Classic Films Continued
Window Energy Rating Scheme (WERS)
The Window Energy Rating Scheme enables windows to be
rated for their energy saving impact on a building.
Interest in energy efficiency and energy ratings is
increasing as consumers and major tenants seek methods
to become greener and reduce their energy costs. Visit
www.wers.net for more information.
Neutral Films
External Films
Explanation of propeties
Shading Coefficient: A ratio
that describes the film/glazing performance over the
entire solar spectrum. The lower the value the greater
the films shading effect.
Visible light reflected: Percentage
of visible light reflected from the film/glazing surface.
Visible light transmitted: Percentage
of visible light allowed to pass through the film/glazing
Emissivity: Is a measure of a
film/glazing ability to absorb and radiate energy
U-value: Describes the amount
of heat energy that is conducted throught the film/glazing.
Heat Gain Reduction: The percentage
reduction of solar energy that is allowed through the
filmed glazing when compared to the same unfilmed glazing
system.
Heat Loss Reduction: The percentage
of heat energy that is prevented from conducting out
through a filmed glazing system when compared to the
same unfilmed glazing system. Glare Reduction: The percentage
reduction in glare of the filmed glazing when compared
to the same unfilmed glazing. Related to visible light
transmission.
UV Blocked: Percentage of the
total UV (Ultra violet) radiation blocked by film/glazing.
Total Solar Energy Rejected:
The percentage of the total solar energy that the film/glazing
blocks.
References:
ASTM E-308 Standard Recommended Practice
for Spectophotometry and Description of Color in CIE
1931 System.
ASTM E-903 Standard Methods of Test for Solar Absorbance,
Reflectance and Transmittance of Materials Using Integrating
Spheres.
The 1985 American Society for Heating, Refrigeration,
and Air Conditioning Engineers (ASHRAE) Handbook of
Fundamentals.
Window 4.0, A Computer Tool for Analyzing Window Thermal
Performance, Lawrence Berkeley Laboratory.
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