Energy Efficient Window Film
Solar Gard window film reflects significant solar energy, while absorbing another
portion of the energy. The result is that the amount of solar radiation transmitted
inside the room is considerably less. Specs will vary depending on the Solar Gard
window film selected.
The movement or transfer of heat from a region of higher temperature to one of
cooler temperature is called heat transfer. The transfer of heat always flows from
hot to cold. No heat will transfer if there is no difference in temperature.
There are three types of heat transfer: radiation, conduction, and convection.
For window film, radiation is the most important method of heat transfer because
it moves infrared waves. This is why we refer to solar energy as solar radiation.
Energy Saving Window Tint
Solar energy through a window is transferred or transmitted by infrared waves.
Radiant energy is converted to heat when it strikes people or objects. If you
block the transfer of this energy you keep it from turning into heat because it
never strikes an object. Window film interrupts the transfer of this energy by
reflecting the energy back.
Transmission is basically the percentage of Solar energy (UV + Visible Light +
Near Infrared) that can passes through a window. Reflection is the ratio of solar
energy reflected back to the source, expressed as a percentage. Absorption is
the percentage of solar energy absorbed to that of the total solar energy.
With solar window film installed on the inside of a window, the proportions
are changed dramatically, with reflected energy and absorption increasing.
This corresponds to a reduction in solar heat transmitted inside the room or
the automobile. The properties of the window film dramatically influence how
and in what way transmission, reflection and absorption change.
How Lowering the Temperature Saves Energy
Only a few degrees in temperature reduction can have up to a 25% reduction
in cooling costs, due to the laws of thermodynamics. It requires considerable
amounts of energy to remove heat from a room through air conditioning. During
peak summer times in the middle of the day, loads on air conditioning systems
can be reduced enough to turn off entire units or to install a less costly system.
In addition to the energy saving benefits, solar window film can increase thermal
comfort, reduce glare, while at the same time rejecting 99% of the UV radiation
reducing fading and the risk of skin cancer.