IR Rejection vs. TSER
IR rejection and TSER are different measurements. Knowing which one a film specification describes helps you compare products without treating one headline number as the whole story.
The practical answer
IR rejection describes how a product handles a portion of the infrared spectrum. TSER, or total solar energy rejected, is a broader measure of solar energy across the tested range. Neither number should be compared blindly across different test methods, glass, shades, or manufacturers.
A useful example
Two films can advertise different IR figures while one has a stronger overall TSER result, or the test conditions may not match. Ask for the full specification sheet and compare the same measurement under comparable conditions.
What to do next
- IR rejection covers part of the sunlight spectrum, not all solar energy.
- TSER is a broader whole-system performance measure.
- Check how a number was tested before using it to choose film.
Common questions
- Is a high IR-rejection number enough to choose a tint?
- No. Review TSER, visible-light transmission, glass, test method, warranty, and the actual coverage together.
- Which specification should a customer ask for?
- Ask for the manufacturer's full specification sheet and compare like-for-like measurements instead of relying on one marketing number.