What Is IR Greenhouse Film and How Does It Work?
IR greenhouse film is an agricultural plastic film designed to influence infrared radiation and greenhouse heat management.
In commercial greenhouse-film specifications, IR commonly refers to a thermal or thermic function designed to reduce the loss of long-wave infrared radiation from inside the greenhouse, especially during the night.
This can help the greenhouse retain more heat when outside temperatures fall.
IR greenhouse film may be useful for:
Cold climates
Winter greenhouse production
High-altitude growing regions
Areas with large day/night temperature differences
Heated greenhouses
Desert regions with cold nights
However, IR greenhouse film is not automatically necessary for every project.
In hot tropical climates where nighttime heat retention is not a priority, growers may benefit more from functions such as:
UV stabilization + Light Diffusion + Anti-Fog
The correct greenhouse film should always be selected according to the actual climate and crop.
Quick Answer: What Does IR Greenhouse Film Do?
IR greenhouse film is mainly used to help reduce nighttime heat loss.
During the day, sunlight enters the greenhouse and warms:
Plants
Soil
Water
Greenhouse structures
These surfaces later release energy as long-wave infrared radiation.
A thermic IR greenhouse film can reduce the amount of this radiation escaping through the greenhouse covering.
As a result, the greenhouse may retain heat more effectively during colder periods.
In simple terms:
Daytime
Sunlight enters → greenhouse surfaces absorb energy
Nighttime
Surfaces release thermal radiation → IR film helps reduce some heat loss
IR film should therefore be viewed as part of a greenhouse thermal-management system.
What Does “IR” Mean in Greenhouse Film?
IR stands for:
Infrared
Infrared radiation covers wavelengths beyond visible red light.
However, the term “IR greenhouse film” can cause confusion because infrared radiation includes different wavelength ranges.
In greenhouse-film specifications, IR often refers to the film's ability to manage long-wave thermal infrared radiation.
This is different from simply blocking solar heat.
Buyers should therefore ask the supplier exactly what “IR” means in the quoted specification.
IR Thermal Retention vs Solar IR Blocking
These are not necessarily the same function.
IR Thermal Retention
Designed to reduce long-wave thermal radiation escaping from inside the greenhouse.
Main purpose:
Nighttime heat retention
Solar IR / NIR Management
May refer to reducing or modifying part of the near-infrared radiation entering the greenhouse.
Main purpose may be related to:
Daytime heat management
These functions should not be confused.
If a supplier simply writes:
IR Film
ask:
Is this a thermic film for nighttime heat retention, or is it designed to reduce incoming near-infrared solar radiation?
This is especially important when comparing quotations.
Why Do Greenhouses Lose Heat at Night?
During the day, solar radiation warms the greenhouse environment.
Energy is stored in:
Soil
Plants
Water
Greenhouse structure
At night, these surfaces release thermal energy.
Heat can leave the greenhouse through:
Conduction
Convection
Air leakage
Thermal radiation
Greenhouse film cannot eliminate all these heat losses.
IR thermic film specifically helps address part of the radiative heat-loss component.
How Does IR Greenhouse Film Work?
IR greenhouse film uses selected materials or additives that alter the film's infrared-radiation properties.
Depending on the formulation, the film can reduce transmission of certain long-wave infrared wavelengths.
This helps reduce radiative heat loss from inside the greenhouse.
The actual performance depends on:
Resin formulation
IR additives
Film thickness
Layer structure
Temperature
Greenhouse design
Therefore, not all films labeled “IR” provide exactly the same thermal performance.
Does IR Film Make the Greenhouse Warmer?
It can help the greenhouse retain more heat under suitable conditions.
However, it does not generate heat.
This distinction is important.
IR film cannot act like a heater.
Instead, its purpose is to reduce part of the heat that would otherwise escape.
Actual greenhouse temperature depends on:
Outside temperature
Solar radiation
Heating system
Ventilation
Greenhouse size
Air leakage
Crop
Film properties
IR film should therefore be considered a heat-retention tool, not a heat source.
When Is IR Greenhouse Film Most Useful?
IR film is especially worth considering when:
Nights are cold
Winter production is important
Heating costs are significant
Day/night temperature differences are large
Crops are temperature-sensitive
Greenhouses are located at high altitude
It may be less important where nights remain consistently warm.
IR Greenhouse Film for Cold Climates
Cold climates are one of the clearest applications for IR film.
A cold-climate greenhouse may require:
High light transmission
IR thermal retention
EVA
Anti-fog
Anti-drip
UV stabilization
A possible specification could be:
PO + UV + IR + EVA + AF
The exact formulation should depend on crop and winter conditions.
IR Greenhouse Film for Winter Production
Winter greenhouse production creates two competing requirements.
Growers often want:
Maximum useful daytime light
while also wanting:
Reduced nighttime heat loss
An IR greenhouse film can be designed as part of this balance.
For winter crops, buyers should compare:
Light transmission
IR performance
Anti-fog
Film durability
rather than selecting a film based only on thickness.
Is IR Film Useful for Heated Greenhouses?
It can be especially relevant.
If a greenhouse uses:
Gas heating
Electric heating
Hot-water systems
Other active heating
heat loss directly affects operating cost.
A suitable thermic film may help reduce radiative heat loss.
However, total heating efficiency also depends on:
Greenhouse insulation
Air leakage
Structure
Ventilation
Thermal screens
IR film should be one part of the complete energy-management system.
Is IR Greenhouse Film Good for Desert Climates?
Sometimes.
Desert climates are commonly associated with extreme heat, but many desert regions have large day/night temperature differences.
Daytime may be very hot while nighttime temperatures fall significantly.
In these conditions, IR may be useful during:
Winter
Cold nights
Certain crop cycles
However, IR should not automatically be included in every desert film.
For very hot areas with warm nights, priorities may instead be:
Strong UV + High Diffusion + AF
Is IR Greenhouse Film Good for Tropical Climates?
Often, IR thermal retention is a lower priority in consistently warm tropical regions.
Common tropical greenhouse challenges may include:
A more relevant specification may be:
UV + AF + Anti-Drip + Suitable Diffusion
Adding IR should depend on actual nighttime temperatures and project requirements.
Is IR Film Useful at High Altitude?
Yes, it can be.
High-altitude growing regions may experience:
This combination can make both:
UV stabilization
and:
IR thermal management
important.
A possible high-altitude specification might include:
Strong UV + IR + EVA + AF + Suitable Diffusion
Does IR Film Reduce Daytime Greenhouse Temperature?
Not necessarily.
This is one of the most common misunderstandings.
A thermal IR greenhouse film designed to retain long-wave heat at night is not automatically a daytime cooling film.
If the project has excessive daytime heat, growers may need:
High-diffusion film
Shading
Ventilation
Pad-and-fan cooling
Evaporative cooling
Thermal screens
Do not assume that adding “IR” will automatically make a hot greenhouse cooler.
IR vs Diffusion: What Is the Difference?
These functions solve different problems.
IR
Primarily manages thermal infrared radiation.
Main goal:
Thermal performance
Diffusion
Scatters incoming sunlight.
Main goal:
Light distribution
A greenhouse film can include both.
For example:
PO + UV + High Diffusion + IR + AF
may be appropriate for a sunny region with cold nights.
IR vs UV: What Is the Difference?
IR and UV are completely different.
UV Stabilization
Protects the greenhouse film from ultraviolet degradation.
Main goal:
Film durability
IR Function
Manages infrared radiation.
Main goal:
Thermal performance
A film can have strong UV stabilization without IR.
Likewise, an IR film still requires adequate UV stabilization for outdoor use.
Does IR Replace UV Stabilization?
No.
IR and UV serve different purposes.
Every long-life greenhouse covering should have a UV stabilization system appropriate for its intended environment.
IR does not protect the film from UV degradation.
Therefore:
IR ≠ UV
IR vs EVA: What Is the Difference?
This is another common source of confusion.
EVA
EVA is a polymer:
Ethylene-Vinyl Acetate
It can influence:
IR
IR describes a thermal-function requirement related to infrared radiation.
Therefore:
EVA ≠ IR
However, EVA and IR can be used together in the same greenhouse film.
For example:
PO + EVA + IR + AF + UV
may be selected for a cold-climate greenhouse project.
Does EVA Automatically Provide IR Performance?
Not necessarily.
EVA may influence the thermal characteristics of greenhouse film, but buyers should not assume that EVA content automatically provides a specific IR thermal-retention level.
If IR performance is required, it should be specified separately.
Ask the supplier:
Is IR functionality included?
What is the purpose of the EVA?
What thermal performance is the formulation designed for?
IR vs Anti-Fog: What Is the Difference?
Again, these functions address different greenhouse problems.
IR
Focuses on:
Heat retention
Anti-Fog
Focuses on:
Condensation behavior
They can be combined.
Cold greenhouse environments often make both relevant because cold covering surfaces can increase condensation.
A cold-climate greenhouse film may therefore include:
IR + AF + EVA + UV
Why IR and Anti-Fog Are Often Used Together
Cold nighttime conditions can create two problems:
Heat leaves the greenhouse.
Water vapor condenses on the cooler film surface.
IR helps address the first problem.
AF helps address the second.
This is why IR and anti-fog are often combined in winter greenhouse-film formulations.
Can IR Film Also Have High Diffusion?
Yes.
Modern multi-functional greenhouse film can combine several properties.
For example:
UV + High Diffusion + IR + AF + EVA
However, every additional function should have a clear purpose.
More functions do not automatically make a film better.
The formulation should match:
Crop
Climate
Greenhouse design
Budget
How Does Multi-Layer Technology Help IR Film?
Multi-layer co-extrusion allows different functions to be distributed across different film layers.
For example:
Outer Layer
May focus on:
UV durability
Weather resistance
Middle Layers
May include:
IR functionality
Mechanical properties
Optical functions
Inner Layer
May include:
This allows manufacturers greater flexibility when designing multi-functional greenhouse films.
Is 7-Layer IR Film Better Than 5-Layer Film?
Not automatically.
A 7-layer structure gives manufacturers more options to distribute different materials and functions.
But final performance still depends on:
Resin selection
IR additive system
Layer design
UV stabilization
Production control
Therefore:
Layer count alone should not be used to judge IR performance.
Technical specifications are more important.
What Thickness Should IR Greenhouse Film Be?
IR functionality can be incorporated into different film thicknesses.
Common commercial options include:
120 micron
150 micron
180 micron
200 micron
The correct thickness should depend on:
Wind
Greenhouse structure
Mechanical requirements
Required life
Installation
Budget
IR and thickness are separate specifications.
Does Thicker Film Have Better IR Performance?
Not automatically.
A thicker film contains more material, but thermal properties depend heavily on the actual formulation.
For example:
A properly designed 150 micron IR film may have more relevant thermal functionality than a basic 200 micron PE film without IR additives.
Therefore, buyers should not use thickness as a substitute for thermal specifications.
150 Micron IR Greenhouse Film
150 micron IR film may be suitable for:
Standard commercial greenhouse projects
Moderate wind conditions
Cost-sensitive applications
Buyers seeking more square meters per ton
Its suitability depends on greenhouse structure and formulation.
200 Micron IR Greenhouse Film
200 micron IR film may be selected for:
However, buyers should still compare:
IR performance + UV + AF + mechanical properties
rather than thickness alone.
Which Crops Can Benefit From IR Greenhouse Film?
IR film may be useful for many temperature-sensitive crops, including:
Tomatoes
Cucumbers
Peppers
Flowers
Strawberries
Leafy vegetables
Nursery crops
Its value depends more on the climate and production season than on the crop name alone.
IR Greenhouse Film for Tomatoes
Tomato growers in cold climates may benefit from a film combining:
High light transmission
IR
AF
UV
EVA where needed
In sunny but cold-night regions, diffusion may also be valuable.
A possible specification:
PO + UV + IR + AF + EVA + Diffusion
IR Greenhouse Film for Cucumbers
Cucumber greenhouses often have relatively high humidity.
Cold-climate cucumber projects may therefore require both:
Thermal Management + Condensation Management
A possible specification:
PO + UV + IR + EVA + AF + Anti-Drip
IR Greenhouse Film for Peppers
Pepper production in cooler climates may benefit from:
If sunlight is strong during the day, diffusion may also be added.
IR Greenhouse Film for Flowers
Flower production can have precise light and temperature requirements.
Depending on the flower species and location, growers may need:
High transmission
Controlled diffusion
IR
AF
UV
The formulation should be selected according to the specific crop.
Does IR Greenhouse Film Save Heating Energy?
It may help reduce a portion of greenhouse heat loss under suitable conditions.
However, the actual energy savings cannot be determined from the words “IR film” alone.
Results depend on:
Outside temperature
Greenhouse size
Heating system
Thermal screens
Air leakage
Film formulation
Weather
Crop management
Buyers should be cautious about universal energy-saving claims that are not supported by project-specific data.
How to Compare IR Greenhouse Film Quotations
Before comparing prices, normalize the specification.
| Parameter | Supplier A | Supplier B |
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| Film Type |
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| Thickness |
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| UV Life |
|
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| Light Transmission |
|
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| Diffusion |
|
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| IR Function |
|
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| AF |
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| Anti-Drip |
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| EVA |
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| Layer Structure |
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| Width |
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| Price |
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Two products described as:
200 micron IR greenhouse film
may have very different formulations.
Questions to Ask an IR Greenhouse Film Supplier
Before ordering, ask:
What does “IR” mean in this film?
Is it designed for nighttime thermal retention?
Is it designed to reduce incoming solar NIR?
What crop and climate is the formulation designed for?
What is the light transmission?
What is the diffusion level?
Is AF included?
Is anti-drip included?
Is EVA included?
What is the UV service-life target?
What is the thickness?
What is the layer structure?
What widths are available?
What is the MOQ?
What conditions affect thermal performance?
These questions make quotation comparison much more meaningful.
Does IR Increase Greenhouse Film Price?
Usually, an IR function adds formulation cost compared with a basic film without thermal additives.
For example:
Basic Film
PE + UV
Multi-Functional Film
PO + UV + IR + EVA + AF
The second formulation generally requires more specialized materials.
However, the buyer should consider whether the additional function provides value for the project.
Adding IR to a greenhouse that never needs heat retention may simply increase cost unnecessarily.
When Should You Not Pay Extra for IR?
IR may be a lower priority when:
Night temperatures remain high
The greenhouse is used only in hot seasons
Heating is not required
Thermal retention provides little practical benefit
In these projects, budget may be better allocated to:
UV stabilization
Diffusion
Anti-fog
Mechanical performance
Film should be designed according to actual needs.
Common Mistakes When Buying IR Greenhouse Film
Mistake 1: Thinking IR Means UV Protection
It does not.
IR and UV are different functions.
Mistake 2: Thinking IR Automatically Cools the Greenhouse
Thermic IR film is commonly intended to help retain nighttime heat, not automatically reduce daytime temperature.
Mistake 3: Thinking EVA and IR Are the Same
They are not.
EVA is a polymer component; IR is a thermal function.
Mistake 4: Choosing IR in Every Climate
Hot tropical greenhouses may not need strong heat-retention performance.
Mistake 5: Comparing Only Thickness
IR performance depends on formulation.
Mistake 6: Ignoring Light Transmission
A greenhouse thermal film still needs appropriate optical performance.
Mistake 7: Buying Every Available Function
More features do not automatically mean better value.
How to Choose IR Greenhouse Film in 7 Steps
Step 1 — Check Night Temperatures
Determine whether heat retention is actually needed.
Step 2 — Check the Growing Season
Winter production may create different requirements from summer production.
Step 3 — Identify the Crop
Confirm its temperature and light requirements.
Step 4 — Choose Thickness
Common commercial options include:
150 / 180 / 200 micron
Step 5 — Select Optical Properties
Evaluate:
Transmission + Diffusion
Step 6 — Select Other Functions
Determine whether the project also needs:
AF + Anti-Drip + EVA + Strong UV
Step 7 — Confirm What the Supplier Means by IR
Make sure the quotation clearly describes the intended thermal function.
IR Greenhouse Film Specification Checklist
Before requesting a quotation, provide:
| Information | Requirement |
|---|
| Country / Region |
|
| Crop |
|
| Greenhouse Type |
|
| Day Temperature |
|
| Night Temperature |
|
| Growing Season |
|
| Thickness |
|
| Width |
|
| Length |
|
| UV Life |
|
| Light Transmission |
|
| Diffusion |
|
| IR | Yes |
| AF |
|
| Anti-Drip |
|
| EVA |
|
| Quantity |
|
| Destination Port |
|
Providing the actual climate information is particularly important for IR film.
Frequently Asked Questions
What is IR greenhouse film?
IR greenhouse film is agricultural plastic designed to influence infrared radiation, commonly to help reduce long-wave thermal heat loss from the greenhouse at night.
How does IR greenhouse film work?
It uses selected materials or additives that reduce transmission of certain thermal infrared wavelengths, helping retain more heat inside under suitable conditions.
Does IR greenhouse film make the greenhouse hotter?
It does not generate heat.
It may help reduce heat loss, especially during colder nighttime conditions.
Does IR greenhouse film reduce summer heat?
Not necessarily.
Thermic IR film and solar-heat-reduction films are not the same thing.
Always confirm the intended IR function.
Is IR the same as UV?
No.
UV stabilization protects the film from ultraviolet degradation, while IR functionality relates to thermal infrared radiation.
Is IR the same as EVA?
No.
EVA is a polymer, while IR is a thermal function.
They can be used together.
Is IR film good for tomatoes?
It can be useful for tomato production in cold climates, winter seasons and regions with cold nights.
Is IR film good for cucumbers?
Yes, particularly in colder environments where nighttime heat retention is important.
AF may also be useful because cucumber greenhouses can be humid.
Is IR greenhouse film good for desert climates?
It can be useful where desert nights become cold.
It may be unnecessary where nighttime temperatures remain high.
Does IR greenhouse film save energy?
It may help reduce part of greenhouse heat loss, but actual energy savings depend on greenhouse design, climate, heating system and film formulation.
IR Greenhouse Film Manufacturer
GH Agricultural Film manufactures customized multi-functional greenhouse films for commercial agricultural projects and distributors.
Our product range includes:
IR greenhouse film
PO greenhouse film
PE greenhouse film
EVA greenhouse film
Full-diffusion greenhouse film
Anti-fog greenhouse film
Anti-drip greenhouse film
Customized multi-functional greenhouse film
Our production capabilities include 7-layer co-extrusion technology.
Greenhouse film can be customized according to:
Thickness
Width
Length
UV service life
Light transmission
Diffusion
IR
AF
Anti-drip
EVA
Packaging
OEM branding
Maximum greenhouse film width can reach 20 meters.
Get an IR Greenhouse Film Recommendation
To receive a suitable IR greenhouse film recommendation, provide:
Country / Region
Crop
Greenhouse Type
Day & Night Temperature
Growing Season
Thickness Requirement
Width & Length
Required Service Life
Other Required Functions
Quantity
We can help evaluate the appropriate combination of:
IR + UV + Transmission + Diffusion + AF + Anti-Drip + EVA + Thickness
for your greenhouse project.