The International Window
Film Association (IWFA), a non-profit organization, is educating the
public on window film use for residential and commercial applications,
to reduce harmful solar glare, while delivering significant energy
All window films typically offer:
Up to 99% Ultraviolet (UV) light reduction resulting in:
-Significant fade protection for furniture, carpet, draperies, wood, etc.
-Reduced fabric/textile deterioration
-Reduced exposure to UV radiation, which has been linked to certain cancers.
Increased shatter resistance resulting in:
-Increased peace of mind
-Increased safety for family & friends
Heavy gauge security films offer significant benefits from:
-Natural disasters such as violent storms, earthquake, high winds, etc.
-Vandalism, terrorist bombings, smash & grab, etc.
-Scratching/graffiti (glass tagging) on exterior windows, restroom
mirrors, elevator doors and glass, and similar flat/smooth surfaces
Scratch resistant hard coating protects against:
-Accidental abrasion and product deterioration from normal cleaning
-Hazy appearance typical with plastic type materials
-Good performance in all climates
Metallized/solar control window film can provide:
-Significantly reduced solar heat gain resulting in:
-Reduced air conditioning costs
Reduced HVAC equipment wear and tear/maintenance
-Increased fade resistance
Attractive accent to home and business windows
Lower energy demands from utilities resulting in:
-Lower overall energy costs
-Decreased demand for new power generating facilities
-Decreased environmental emissions
Who needs film?
-Glass Repair/Replacement Companies
-Heating/Air Conditioning Service Companies
-Heating/Air Conditioning Engineers
-Large Commercial Customer Institutions
-Large Commercial Buildings
-Mobile Home Owners
-Renters With Responsibilities For Utilities
-Real Estate Rental/Management Firms
-Residential Customer Home
-Retail Chain Stores
-Small Professional/Office Complexes
-Small Remodeling Firms
-Small Residential Developer/Contractor
Definition of Terms
Total Solar Transmittance - The ratio of the amount of total solar
energy in the full solar wavelength range (300-2,100 nanometers) that
is allowed to pass through a glazing system to the amount of total
solar energy falling on that glazing system. Value is usually
expressed as a percent.
Total Solar Reflectance - The ratio of total solar energy which is
reflected outward by the glazing system to the amount of total solar
energy falling on the glazing system. On filmed windows this
reflectance is a function of the side of the film facing the window
surface. Value is usually expressed as a percent.
Total Solar Absorption - The ratio of the amount of total solar energy
absorbed by a glazing system to the amount of total solar energy
falling on the glazing system. Solar absorption is that portion of
total solar energy neither transmitted nor reflected. Since solar
transmittance and solar reflectance are measured directly, the
following equation should be used in calculating solar absorption.
Solar absorption =1.00 - (solar transmittance) - (solar reflectance)
Visible Light Transmittance - The ratio of the amount of total visible
solar energy (380-780 nanometers) that is allowed to pass through a
glazing system to the amount of total visible solar energy falling on
the glazing system. Value is usually expressed as a percent. Glare is
influenced by visible light transmittance through a glazing system.
Visible Light Reflectance - The percent of total visible light to be
reflected by a glazing system that can be seen visually.
Ultraviolet (UV) Transmittance - The ratio of the amount of total UV
solar energy (300-380 nanometers) that is allowed to pass through a
glazing system to the amount of total UV solar energy falling on the
glazing system. Ultra-violet is one portion of the total solar energy
spectrum which greatly contributes to fading and deterioration of
fabric and furnishings.