Solar Control Window Film: How Window Tint Works & What Is TSER, IRR & VLT
Updated: 4 days ago
When sunlight enters through your windows, it brings more than natural daylight into your home or office. Solar radiation contains ultraviolet (UV), visible light and infrared (IR) energy. Together, these can contribute to indoor heat, uncomfortable glare, fading of furniture and finishes, and increased cooling demand.
This is where solar control window film aka solar heat rejection window film, commonly called tinted rumah, residential window tint, house window tint, office window tint, commercial window tint or heat rejection film, can help.
Modern window films are engineered to control different portions of solar energy while allowing you to choose how much visible light enters your space. Depending on the technology, window film can also provide daytime privacy, reduce glare and help protect interior furnishings from prolonged solar exposure.
But how exactly does window film work?
And what do specifications such as VLT, TSER, UV rejection and IR rejection actually mean?
More importantly, why should you be careful when a window film is advertised with an impressive “99% IR rejection” figure?
This guide explains the science behind solar-control window film and the key performance specifications you should understand before choosing a film for your home, office or commercial building.
What Is Solar Control Window Film? How Does Window Tint Work?
What Is UVR, TSER, IRR & VLT?
Solar control window film is an architectural film designed to modify the amount of solar radiation transmitted through glass.
Depending on its construction and technology, a film can:
Reflect solar energy
Absorb solar energy
Reduce infrared transmission
Reduce UV transmission
Reduce visible light and glare
Provide daytime privacy
Improve indoor visual and thermal comfort
The term window tint is commonly used when searching for solar heat rejection window film for residential and commercial solutions such as tinted rumah, house window tint, office window tint or window tinted film Malaysia.
However, solar control window film or solar heat rejection window film is a more precise technical description when the primary objective is controlling solar energy.
Not every window film is a solar-control film.
Window film is a broad category that can include:
Solar control film
Reflective film
Nano ceramic film
Sputter film
Privacy film
Frosted film
Decorative film
Safety film
Security film
This article focuses specifically on solar-control and heat-rejection window film.
What Happens When Sunlight Hits Your Window?
Sunlight contains a broad range of electromagnetic radiation. For practical window-film applications, it can be divided into three important portions:
Ultraviolet (UV) radiation
Visible light
Infrared (IR) radiation
When sunlight reaches a window, some energy is reflected away, some passes through the glass, and some is absorbed by the glass and subsequently released as heat.
Installing window film changes how that solar energy interacts with the glazing system.
Depending on the film construction, the film can reflect, absorb or transmit portions of the incoming solar spectrum, reducing the amount of solar energy transmitted into the room.
The objective is not simply to make the glass darker.
A properly selected solar-control film is designed to manage solar energy while maintaining an appropriate level of daylight, visibility and appearance.
This is why two films with a similar appearance can have very different performance characteristics.
1. Ultraviolet Radiation: Understanding UV Rejection (UVR)
Ultraviolet radiation is invisible to the human eye.
Prolonged UV exposure can contribute to the deterioration and fading of many interior materials, including:
Furniture
Curtains
Carpets
Flooring
Artwork
Fabrics
Interior finishes
The UV rejection value in the market is typically either 99.9% or over 99%.
However, UV protection should not be confused with heat rejection.
A film can have excellent UV rejection without necessarily having the highest overall solar-energy rejection.
UV represents only one portion of the solar spectrum.
Therefore, UV rejection should be considered as one component of overall window-film performance.
Why UV protection matters
UV-control window film can help:
Reduce UV exposure through windows
Protect furniture and interior finishes
Slow fading caused by prolonged solar exposure
Reduce the amount of UV radiation entering occupied spaces
For homes with large windows, offices with extensive glazing and retail spaces displaying products near windows, UV protection can be an important consideration.
2. Visible Light: Understanding Visible Light Transmittance (VLT)
Visible light is the portion of sunlight that our eyes can see.
The amount of visible light transmitted through a window film is expressed as Visible Light Transmittance (VLT).
What is VLT?
VLT is the percentage of visible light transmitted through the glazing system.
For example:
70% VLT — relatively bright and clear appearance
50% VLT — moderate light reduction
35% VLT — noticeably tinted
20% VLT — darker appearance
5% VLT — very dark appearance
The actual appearance will also depend on the original glass, film construction, interior and exterior lighting conditions, and the surrounding environment.
Importantly:
VLT is not a direct measurement of heat rejection.
A darker film is not automatically a better heat-rejection film.
Advanced solar-control films can be engineered to reject substantial solar energy while maintaining relatively high visible-light transmission.
This is one of the most important points when selecting window film:
You do not necessarily need a very dark film to achieve effective solar control.
3. Infrared Radiation (iR): Understanding the Heat You Feel
Infrared radiation is invisible to the human eye and represents a significant portion of solar energy.
It is commonly associated with the radiant heat you feel when standing near a sun-exposed window.
This is why many modern window films place considerable emphasis on infrared performance.
Certain film technologies are engineered to absorb or reflect portions of infrared radiation, reducing the amount of radiant solar energy transmitted through the glazing.
However, there is an important distinction:
IR rejection is not the same as total solar-energy rejection.
This is where many window-film specifications can become confusing.
A film may advertise a very high IR rejection (IRR) percentage while having a considerably lower TSER value.
That does not necessarily mean the IR specification is false.
It means the two measurements are evaluating different aspects of solar performance.
4. What Is IR Rejection (IRR)?
IRR stands for Infrared Rejection.
It refers to how effectively a film rejects infrared radiation under the particular test conditions, wavelength range and methodology specified by the manufacturer or testing body.
This is an important specification, but it must be understood in context.
Infrared is not one single wavelength
Infrared covers a broad range of wavelengths.
Therefore, when you see an advertisement stating:
99% IR Rejection
one of the most important questions to ask is:
“99% IR rejection measured at what wavelength or wavelength range?”
This matters because a film can perform extremely well over one portion of the infrared spectrum without rejecting the same percentage of the entire solar spectrum.
The International Window Film Association (IWFA) has specifically addressed this issue because infrared-rejection claims can potentially confuse consumers when the measurement method or wavelength range is not clearly stated.
The IWFA has promoted a more clearly defined approach to reporting infrared energy rejection, including measurement across a broader infrared range, rather than relying on an unspecified or narrow-band IR claim.
Therefore:
An IRR percentage without its measurement conditions does not provide enough information for a fair comparison between films.
5. IRR Is NOT TSER
This is one of the most important things consumers should understand when comparing window films.
A film advertised as:
“99% IR Rejection”
does not mean:
“99% Total Heat Rejection.”
These are different measurements.
Why can “99% IR rejection” be misleading?
The problem is that infrared is only one portion of the solar spectrum.
Solar radiation reaching a window consists broadly of:
Ultraviolet
Visible light
Infrared
An IRR measurement focuses on infrared radiation under its specified measurement conditions.
It does not automatically tell you how much of the total solar energy is rejected by the complete glazing system.
The IWFA has warned about infrared-rejection claims that may be based on limited wavelength ranges and has emphasized the importance of defining how infrared rejection is measured.
This is why:
99% IR rejection ≠ 99% total solar-energy rejection
and certainly should not automatically be described to a customer as:
99% heat rejection.
6. Why IRR Can Look Much Better Than TSER
There is a simple reason why IR rejection numbers are attractive in advertising.
A number such as:
99% IR Rejection
sounds dramatically better than:
65% TSER
to someone who does not know what the two measurements represent.
But these numbers cannot be compared directly.
It would be like comparing a car's braking performance with its fuel efficiency simply because both are expressed as percentages.
The percentages may both be legitimate, but they measure different things.
The wavelength matters
When you see:
IR Rejection: 99%
ask:
“At what wavelength?”
“Over what wavelength range?”
“What test method was used?”
“What glass was the film tested on?”
Without these details, the percentage alone tells you very little about the film's overall solar-control performance.
7. What Is TSER?
TSER stands for Total Solar Energy Rejected.
It is one of the most useful specifications when evaluating a window film's overall ability to control solar energy.
Solar radiation contains different portions of energy, including:
Ultraviolet radiation
Visible radiation
Infrared radiation
A window film interacts with these portions of solar energy in different ways.
Depending on its construction, the film can:
Reflect solar energy
Absorb solar energy
Transmit solar energy
TSER represents the total percentage of incident solar energy rejected by the glazing system under the stated test conditions.
This makes TSER a much broader solar-control measurement than an IR rejection figure alone.
8. Is TSER Simply IR + VLT + UV?
No.
This is an important technical clarification.
You may sometimes see the relationship between UV, visible and infrared radiation simplified as:
UV + Visible + IR = Solar Radiation
That is useful for understanding the different portions of sunlight.
However, it is not correct to calculate TSER by adding IR rejection + VLT + UV rejection.
For example, a film might have:
99% UV rejection
95% IR rejection
50% VLT
65% TSER
There is no mathematical contradiction.
The four numbers are measuring different properties.
Think of the specifications this way:
VLT → How much visible light is transmitted?
UV rejection → How much UV radiation is rejected under the stated test?
IR rejection → How much infrared radiation is rejected under the specified measurement?
TSER → How much of the total solar energy is rejected?
The solar spectrum includes UV, visible and infrared energy, but VLT is not an energy-rejection percentage, and IRR is not equivalent to total solar rejection.
The actual solar-energy balance involves how radiation is transmitted, reflected and absorbed by the glazing system across the solar spectrum.
Therefore:
UV + VLT + IR does not equal TSER.
And:
IRR cannot be substituted for TSER.
9. A Simple Example: How the Numbers Can Coexist
Consider this hypothetical film:
Specification | Example | What it means |
VLT | 50% | Visible-light transmission |
UV Rejection | 99% | UV rejection under the stated test |
IR Rejection | 95% | IR rejection under the stated test |
TSER | 65% | Total solar-energy rejection |
Some customers may look at these numbers and ask:
“If the film rejects 95% of IR and 99% of UV, why is TSER only 65%?”
The answer is simple:
Because they are not measuring the same thing.
IRR measures infrared performance under specified conditions.
UV rejection measures UV performance.
VLT measures visible-light transmission.
TSER represents the overall solar-energy rejection of the glazing system.
The figures therefore should not be added together or compared as though they are equivalent percentages.
10. Why TSER Is Important for Heat Control
If your primary objective is:
“I want to reduce the amount of solar heat entering my room.”
then TSER is an important specification to examine.
It gives a broader indication of the glazing system's overall solar-energy rejection than looking at infrared rejection alone.
Industry guidance has also emphasized using TSER when discussing overall heat-rejection performance rather than using an IR figure by itself.
However, TSER should still be interpreted together with the other specifications and the glazing configuration used for the test.
11. TSER Depends on the Glazing System
Another important point is that TSER is not necessarily a property of the film in isolation.
The final solar-performance values can depend on the combination of:
Glass + film + glazing configuration + test conditions
For example, the same film installed on different types of glass can produce different overall glazing performance.
This is why technical specifications should identify the relevant glass configuration and test methodology.
When comparing two products, customers should compare data obtained under similar testing conditions.
Otherwise, apparently similar numbers may not represent a true like-for-like comparison.
12. What Is SHGC?
Another useful solar-performance specification is SHGC, or Solar Heat Gain Coefficient.
SHGC represents the fraction of incident solar radiation admitted through the glazing system as heat.
Generally:
Lower SHGC = less solar heat gain
SHGC is widely used in building-performance analysis and window-rating systems.
It is particularly useful when evaluating solar-control glazing as part of a broader building energy strategy.
For customers comparing window films, SHGC can provide another useful reference alongside TSER.
13. Reflective Window Film: How It Works
Reflective window films typically contain materials designed to reflect a significant portion of incoming solar energy.
From outside, these films can create a more reflective or mirrored appearance.
This characteristic can provide two useful benefits.
Solar control
The reflective layer can help send a portion of incoming solar energy back toward the exterior rather than allowing it to enter the building.
Daytime privacy
Under suitable lighting conditions, reflective film can make it more difficult for people outside to see into a brighter interior.
However:
Reflective privacy is not the same as permanent one-way privacy.
The privacy effect depends heavily on the difference between exterior and interior lighting.
During the day, when the exterior is brighter than the interior, reflective film can provide strong daytime privacy.
At night, if the interior is brighter than the outside, the privacy effect can change substantially.
Therefore, reflective film should not be marketed as providing guaranteed 24-hour one-way privacy.
14. How Nano Ceramic Window Film Works
Nano ceramic window film uses microscopic ceramic materials incorporated into the film structure to control solar energy.
Unlike conventional dyed films, ceramic technology can provide solar-control performance without relying solely on making the glass appear extremely dark.
Depending on the product construction, ceramic films can provide:
Solar heat control
Infrared control
High UV rejection
Glare reduction
Good optical clarity
A relatively natural appearance
High visibility through lighter films
One advantage of non-metallic ceramic technology is that it can avoid some of the signal-interference concerns associated with certain metallic constructions.
However, the exact performance depends on the specific product.
Nano ceramic does not automatically mean “best”
There is no single window film that is best for every building.
The appropriate film depends on:
Window orientation
Glass type
Desired VLT
Solar exposure
Privacy requirements
Glare conditions
Interior design
Budget
Desired appearance
A high-performance film selected incorrectly can still be the wrong solution for a particular window.
15. How Sputter Window Film Works
Sputter film is manufactured using a process in which extremely thin layers of materials are deposited onto the film.
The resulting multilayer construction can be engineered to control solar energy while maintaining particular optical characteristics.
Sputtered films can be designed for:
High solar-energy rejection
Controlled visible-light transmission
Glare reduction
Neutral or reflective appearance
Long-term optical performance
The exact performance depends on the specific construction and product specification.
Two films described as “sputter” can have significantly different VLT, TSER and optical characteristics.
The technology name alone therefore should not be treated as a performance guarantee.
16. Reflective vs Nano Ceramic vs Sputter Film
There is no universal winner.
Each technology can be appropriate for different applications.
Feature | Reflective Film | Nano Ceramic Film | Sputter Film |
Solar control | Excellent on suitable products | Excellent on suitable products | Excellent on suitable products |
Appearance | Reflective / mirrored | Usually more neutral | Neutral to reflective depending on construction |
Daytime privacy | Strong on suitable products | Depends on VLT and reflectivity | Depends on construction |
Visible-light options | Various | Wide range | Various |
Infrared control | Product dependent | Strong on suitable products | Strong on suitable products |
Glare reduction | Strong | Depends on VLT | Depends on VLT |
Signal considerations | Product dependent | Often non-metallic | Product dependent |
Typical application | Solar control + privacy | Comfort + clarity + solar control | High-performance solar control |
The table is intentionally general.
Actual performance must always be determined from the technical data for the specific product.
17. Why a Darker Film Is Not Necessarily a Better Film
This is one of the most common misconceptions about window tint.
Many people assume:
Darker film = more heat rejection
That is not necessarily true.
Darkness is primarily related to visible-light transmission.
Heat rejection is influenced by the film's overall solar-control characteristics and its interaction with the glazing.
A high-performance light or medium-VLT film can provide substantial solar control without creating the appearance of extremely dark glass.
This can be particularly important in:
Living rooms
Offices
Meeting rooms
Showrooms
Retail spaces
High-rise offices
Homes where natural daylight is important
The objective should not simply be to choose the darkest film.
The objective is to find the appropriate balance between:
Heat rejection + daylight + glare control + privacy + appearance
18. Glare Reduction: More Than Just Making the Window Dark
Glare occurs when excessive brightness creates visual discomfort or makes it difficult to see clearly.
In offices, glare can be particularly problematic around:
Computer monitors
Meeting-room screens
Reception areas
Glass partitions
South- or west-facing windows
Reducing VLT can reduce the amount of visible light entering the room and therefore help reduce glare.
However, the right solution depends on the location and orientation of the window.
A west-facing office exposed to strong afternoon sunlight may require a different film selection from a shaded window with relatively soft daylight.
This is why professional film selection is more useful than choosing a film solely from a shade chart.
19. Solar Heat and Air Conditioning
One of the main reasons Malaysian homeowners and businesses install solar-control window film is to improve thermal comfort.
When solar radiation enters through large areas of glass, it can increase the cooling load of an air-conditioned space.
Reducing solar heat gain through glazing can help reduce hot spots around windows and potentially reduce cooling demand, particularly during periods of strong solar exposure.
Actual energy savings depend on many factors, including:
Window area
Glass type
Building orientation
Solar exposure
Existing shading
Air-conditioning system
Indoor temperature settings
Occupancy
Film performance
Installation quality
Therefore, it is better to avoid promising a fixed percentage of electricity savings for every building.
20. Why Window Orientation Matters
Not every window receives the same amount of solar radiation.
A window facing:
East receives strong morning sunlight
West receives strong afternoon sunlight
South can receive substantial solar exposure depending on location and season
North generally experiences a different solar exposure pattern
In Malaysia's tropical climate, solar exposure can be significant throughout the year.
This means film selection should consider the actual building rather than simply choosing the same film for every window.
A west-facing living-room window may require stronger solar control than a shaded window on another elevation.
21. Window Film Is a System, Not Just a Sheet of Film
One of the most important technical concepts is that window-film performance should be considered together with the glazing.
The final result depends on the interaction between:
Glass + film + frame + orientation + solar exposure + interior conditions
A film specification measured on one type of glass should not automatically be assumed to produce exactly the same performance on every glazing system.
This is why professional technical specifications identify their test conditions.
For meaningful comparison, always check:
Film specification
Glass configuration
Test methodology
Measurement conditions
22. Why Installation Quality Matters
Even a high-performance window film can perform poorly if it is incorrectly installed.
Professional installation helps ensure:
Proper glass preparation
Correct film positioning
Clean edges
Proper adhesion
Minimal contamination
Consistent appearance
Correct curing
Reduced risk of premature failure
Installation quality also affects the appearance of the finished installation.
This is particularly important on large architectural windows, where small installation imperfections can become highly visible.
For commercial buildings, consistent workmanship across multiple windows is equally important.
23. What About Existing Glass?
Window film is not suitable for every glass type or every installation condition.
Before installation, a professional should consider:
Glass type
Glass thickness
Single glazing
Laminated glass
Double glazing / insulated glass units
Existing coatings
Existing film
Frame condition
Solar exposure
Manufacturer compatibility
Some glazing systems may have specific restrictions regarding film application.
This is why professional assessment should come before selecting a film purely from its performance numbers.
24. How to Read a Window Film Specification Sheet
When comparing window films, start with these specifications.
1. VLT — Visible Light Transmittance
Tells you how much visible light passes through.
Higher VLT = brighter interior.
Lower VLT = darker appearance and generally stronger glare reduction.
But VLT is not a direct heat-rejection rating.
2. TSER — Total Solar Energy Rejected
Provides a broader measure of how much total solar energy is rejected.
For solar-heat-control applications, this is one of the important figures to compare.
3. UVR — Ultraviolate Rejection
Indicates the percentage of UV radiation rejected according to the stated test method.
High UV rejection is useful for reducing UV exposure through glazing.
4. IRR — Infrared Rejection
Indicates infrared rejection under the stated test conditions.
Always check:
What wavelength or wavelength range?
What test method?
A claim such as “95% IR rejection” is incomplete without understanding the measurement conditions.
5. SHGC — Solar Heat Gain Coefficient
Indicates the fraction of incident solar radiation admitted through the glazing system as heat.
Generally:
Lower SHGC = less solar heat gain.
6. Warranty
A professional window-film specification should also state the applicable warranty conditions.
Check:
Film warranty period
Installation/workmanship coverage
Glass compatibility
Exclusions
Warranty registration requirements
A long film warranty and a workmanship guarantee are not necessarily the same thing.
25. The Five Questions You Should Ask Any Window Film Provider
If a company tells you:
“Our film has 99% IR rejection.”
don't stop there.
Ask:
1. What is the TSER?
This tells you about total solar-energy rejection.
2. What is the VLT?
This tells you how much visible light passes through.
3. At what wavelength was the IR rejection measured?
A percentage without a wavelength or measurement range is difficult to compare fairly.
4. What test method was used?
Different testing methods can produce different reported values.
5. What glass configuration was used?
Film performance can change depending on the glazing system.
These questions allow customers to make a much more meaningful like-for-like comparison.
26. Don't Compare Window Films Using One Number
Suppose Film A advertises:
99% IR rejection
while Film B advertises:
70% TSER
It would be incorrect to conclude that Film A is automatically better because 99 is larger than 70.
They are measuring different things.
Similarly:
99% UV rejection
does not mean:
99% heat rejection.
And:
70% VLT
does not mean:
70% heat enters the room.
These specifications describe different parts of the film's performance.
A meaningful comparison should examine the complete technical specification.
27. What Is the Best Window Film for a Malaysian Home?
There is no single answer.
The right film depends on what you want to achieve.
If your priority is maximum daytime privacy
A suitable reflective film may be worth considering.
If you want strong heat control while maintaining a relatively natural appearance
Nano ceramic or sputter technology may be appropriate depending on the product.
If you want high solar rejection with a particular optical appearance
A high-performance sputter or reflective film may be suitable.
If you want to maintain plenty of natural daylight
Consider a higher-VLT solar-control film rather than automatically choosing a dark film.
If glare is the main problem
Film selection should consider both VLT and the orientation of the affected windows.
If furniture fading is the concern
Prioritise strong UV protection while also considering overall solar control.
The best solution is therefore not simply:
“Which film has the highest number?”
It is:
“Which film provides the right performance for this particular window and this particular building?”
28. How UV GARD Approaches Film Selection
At UV GARD, window-film selection should begin with the customer's actual problem rather than simply recommending the darkest or most expensive film.
We consider factors such as:
Type of property
Window size
Window orientation
Amount of direct sunlight
Indoor heat
Glare
Privacy requirements
Desired appearance
Natural-light requirements
Glass type
Budget
Desired level of solar control
Based on these factors, the appropriate film technology and VLT can be considered.
UV GARD provides architectural window-film solutions for:
Residential properties
Offices
Commercial buildings
Privacy applications
Decorative glass
Solar heat control
Safety and security applications
The objective is to provide a window-film solution that addresses the actual problem rather than applying the same specification to every window.
Frequently Asked Questions
Does darker window film reject more heat?
Not necessarily. Darker film generally allows less visible light to pass through, but darkness alone does not determine total solar-energy rejection. Film technology, construction and glazing combination are also important.
Is 99% IR rejection the same as 99% heat rejection?
No. IR rejection and total solar-energy rejection are different measurements. Always check the measurement wavelength, test methodology and the film's TSER or other applicable solar-performance data.
What does VLT mean in window film?
VLT means Visible Light Transmittance. It indicates the percentage of visible light transmitted through the glazing. A higher VLT generally produces a brighter interior.
What is TSER in window film?
TSER means Total Solar Energy Rejected. It provides a broader indication of the total solar energy rejected by the glazing system under specified test conditions.
Is TSER calculated by adding UV rejection, IR rejection and VLT?
No. These measurements cannot simply be added together. VLT measures visible-light transmission, while UV and IR rejection describe specific portions of the solar spectrum. TSER represents total solar-energy rejection based on the overall solar-energy behaviour of the glazing system.
Why can a film have 99% IR rejection but only 65% TSER?
Because IR rejection measures infrared performance under specified conditions, while TSER considers total solar-energy rejection. The two percentages measure different properties and are not directly interchangeable.
Does window film block UV rays?
Many architectural window films provide very high UV rejection. The exact performance should be confirmed from the manufacturer's technical specifications and test conditions.
Is ceramic film better than reflective film?
Not automatically. Ceramic and reflective films use different approaches to solar control and can be suitable for different requirements. The correct choice depends on heat rejection, VLT, privacy, appearance, glass type and budget.
Does window film make a room completely cool?
No. Window film can reduce solar heat entering through the glass, but indoor temperature also depends on insulation, air conditioning, roof heat, walls, ventilation and other building factors.
Can window film reduce glare?
Yes. Appropriate film selection can reduce the amount of visible light entering through the glass and therefore help reduce glare. The degree of glare reduction depends on the film's VLT and optical characteristics.
Does reflective window film provide privacy at night?
Not necessarily. Reflective privacy depends on relative lighting conditions. A film that provides strong daytime privacy may provide substantially less privacy when the interior is brighter than the exterior at night.
Can window film be installed on all types of glass?
Not necessarily. Glass type, thickness, construction, coatings and exposure should be assessed before installation. Some glazing systems have specific film compatibility requirements.
Final Thoughts: Look Beyond the Biggest Percentage
Window film is much more than simply putting a darker shade on your windows.
Modern architectural films can be engineered to control different portions of the solar spectrum, including ultraviolet, visible and infrared radiation.
The key specifications tell you different parts of the story:
VLT tells you about visible-light transmission.
UV Rejection tells you about ultraviolet protection.
IR Rejection tells you about infrared performance under specified test conditions.
TSER provides a broader indication of total solar-energy rejection.
SHGC describes the solar heat gain characteristics of the glazing system.
The most important lesson is this:
IRR is NOT TSER.
A claim such as:
“99% IR Rejection”
does not mean:
“99% Total Heat Rejection.”
IR rejection should therefore never be presented as though it were TSER.
When comparing window films, ask for the complete technical information and compare like with like:
VLT + TSER + UV rejection + IR/IRER + SHGC + test conditions + glass configuration
rather than selecting a product based on a single impressive marketing percentage.
The goal is not to find the film with the biggest number on the brochure.
The goal is to find the film that provides the right balance of solar heat control, glare reduction, UV protection, privacy, natural daylight, appearance and long-term performance for the particular building and glazing system.
For Malaysian homes, offices and commercial buildings, professional assessment and transparent technical specifications provide a much better basis for selecting window film than marketing percentages alone.
Choose the performance, not just the percentage.
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