Total Solar Energy Rejection Vs Infrared Rejection

Most window film companies out there only display the near infrared rays wavelength of 900nm 1100nm giving the misleading data of 99 ir rejection.

Total solar energy rejection vs infrared rejection.

However irr does not measure the total amount of heat that is. Total infrared rejection is a good way to measure the performance differences of like technologies in this case nano particles pinnacle vs stratos to be able to understand the performance improvement between the films. Irr measures only the amount of ir infrared component that is rejected by the window film. So if a film has a 65 ir it means the film rejects 65 but lets in 35 ir.

Furthermore there is no standard method to report these values and most window film product manufacturers unlike vkool report ir rejection. Improperly educated window film dealers crafty marketing on the part of manufactures and a lack of standardized testing can propagate misinformation leading a consumer to conclude that a window film will reject up to 98 of the heat. The total amount of infrared rays rejected by the window film glass. Window films are capable of rejecting infrared ir but oftentimes this can be mistaken for total solar energy rejection.

Two common heat rejection indexes used are irr infrared rejection and tser total solar energy rejection. When the sun is directly overhead all vertical windows with or without film have 100 total solar energy rejection. Although it may be natural to consider heat when you think of ir this is not accurate because infrared rays only account for just over half of the total solar energy. The higher the number the higher the infrared rays rejected.

Tser includes visible light infrared radiation and ultraviolet energy. The higher the percentage the higher the percentage of solar energy deflected. Measured over the wavelength from 780nm 2500nm. Total solar energy rejected tser is the percentage of the total solar energy that is rejected.

The ir rejection rate is a number that lets customer understand that the film can reject majority of the heat from infrared it does not mean that if a large portion of the ir is blocked. A lot of people think that infrared ir rejection and total solar energy rejection are the same thing but this is not the case. Total solar energy rejected tser is a factor that describes the total amount of solar energy uv visible ir that is rejected from passing through glass.