KNOWLEDGE / FILM PERFORMANCE
Know what the numbers mean.
Key window-film measurements explained without replacing a product-specific technical data sheet.
Read the data sheet. Ask the question.
Published figures depend on the test method, wavelength range and glazing assembly. Verify claims using a model-specific data sheet.
01 / LIGHT
VLT
Visible Light Transmission
The share of visible light transmitted through the specified film or glazed assembly.
02 / SOLAR ENERGY
TSER
Total Solar Energy Rejected
Compare this measurement only when test methods and glazing conditions are comparable.
03 / ULTRAVIOLET
UVR
Ultraviolet Rejection
Confirm the wavelength range and the test method used for a quoted rejection figure.
04 / INFRARED
IRR
Infrared Rejection
A single-wavelength IR figure is not the same as full-spectrum solar-energy rejection.