Why Do Other Brands Emphasize Infrared Rejection (IRR) While LLumar Uses TSER?
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An Infrared, or IR Film, can help control the sun’s rays, that cause solar heat, while allowing a certain percentage of light and heat to come through. Window film may look like nothing more than a thin piece of plastic, but in reality, is a very complex product. State-of-the-art research and technology are necessary to deliver safe and certified Infrared Film. – Explanation between IR (Infrared Rejection) & TSER (Total Solar Energy Rejected)
The Technical Difference
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| Topic | Other Brands | LLumar (Eastman) |
| Infrared Rejection (IRR) | Frequently advertise IRR values at a narrow range (often 900–1000?nm) | Focuses on TSER – Total Solar Energy Rejection covering the full 300–2500?nm spectrum |
| Marketing Focus | Consumer-friendly messaging: “Rejects 97% of IR” sounds attractive | Technical and professional: backed by NFRC certification |
| NFRC Certified? | Not always. Many IRR figures are not NFRC-certified | Yes – All performance data is NFRC-verified |
| IWFA Compliant? | May use partial-band IR claims that do not align with full-spectrum standards | Fully compliant with IWFA and NFRC testing guidelines |
– Other Brands’ IR Rejection (%): Often highlights high rejection at a single point (e.g., 1000 nm). While this looks impressive, it does not reflect actual performance across the full infrared spectrum (780–2500 nm), where most solar heat is present.
– LLumar’s TSER (Total Solar Energy Rejected): A comprehensive performance metric that includes:
– Ultraviolet (300–380 nm)
– Visible light (380–780 nm)
– Infrared (780–2500 nm)
TSER reflects real-world heat rejection and is independently verified under NFRC standards.
Why LLumar’s Approach Is Better
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1. Full Spectrum Performance: TSER covers all infrared wavelengths that contribute to heat, not just a selective segment.
2. IWFA & NFRC Alignment: LLumar’s data is transparent and standardized, making it suitable for tenders, building code compliance, and technical evaluation.
3. Trusted by Professionals: Architects, consultants, and government agencies prefer TSER and NFRC values because they represent actual thermal performance, not just marketing highlights.
Why LLumar’s Approach Is Better
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Use Case | Best Metric |
Consumer marketing or demos | IRR at 1000 nm may look attractive (used by other brands) |
Professional projects and tenders | LLumar’s TSER is more accurate and widely accepted |
Requirement: 800–2500 nm IR rejection | LLumar’s TSER meets full-spectrum requirements; selective IRR does not |
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