Cold Room Curtains: PVC Strip Curtains vs Air Curtains for Cold Storage

Standard PVC Strip Curtains

Standard transparent PVC strip curtains commonly serve chiller rooms, preparation areas and moderate-temperature refrigerated spaces.

 

Typically, the flexible strips overlap across the doorway. Therefore, when a person or trolley passes through, only the required strips move aside.

 

Immediately afterward, gravity returns the strips toward their normal position.

 

As a result, most of the opening remains covered.

 

Furthermore, transparent PVC provides good visibility. Consequently, workers can often see approaching personnel or equipment from the opposite side.

 

However, standard PVC can lose flexibility at low temperatures. Therefore, engineers should not automatically use standard PVC in freezer applications.

 

Freezer-Grade PVC Strip Curtains

Freezer rooms require PVC compounds that remain flexible at low temperatures.

 

For example, a room operating between approximately -18°C and -25°C needs a different material from a chiller operating between 0°C and +5°C.

 

Therefore, the supplier should confirm the operating temperature range of the PVC before installation.

 

Freezer-grade material should resist:

• Hardening
• Brittleness
• Cracking
• Curling
• Excessive stiffness

 

If the strips become rigid, personnel may find them difficult to pass through.

 

Furthermore, rigid strips may not return to the correct position after traffic passes.

 

Consequently, the air barrier becomes less effective.

 

Polar-Grade PVC Curtains

Polar-grade PVC suits lower-temperature conditions where standard freezer-grade material may not provide enough flexibility.

 

Therefore, designers may consider polar material for deep-freeze areas, certain blast freezer applications and extremely low-temperature storage.

 

However, engineers must verify the actual minimum temperature rating.

 

A product description such as “freezer curtain” alone does not provide enough technical information.

 

Instead, the specification should clearly state the operating temperature range.

 

Ribbed PVC Strip Curtains

Ribbed PVC contains raised ribs along the strip surface.

 

Consequently, trolleys, pallets or light forklift traffic contact the raised areas instead of continuously rubbing against the main surface.

 

Therefore, ribbed strips can provide better durability in busy locations.

 

Moreover, reduced surface contact can help maintain visibility for longer.

 

Ribbed cold room curtains can suit:

• Refrigerated warehouses
• Distribution centres
• Food-processing plants
• Loading areas
• High-traffic cold rooms

 

However, engineers should still select the correct strip thickness and overlap.

 

Anti-Static PVC Curtains

Some industrial applications require static-electricity control.

 

Therefore, manufacturers can supply anti-static or static-dissipative PVC strip materials.

 

These curtains may suit certain electronics, pharmaceutical or specialised process areas.

 

However, engineers should confirm the required electrical characteristics before selecting the curtain.

 

Not every transparent PVC material provides anti-static performance.

 

Coloured and Tinted PVC Curtains

PVC strips can also come in different colours or tints.

 

For example, some facilities use:

• Clear PVC
• Amber PVC
• Red PVC
• Blue PVC
• Opaque PVC

 

Clear strips provide maximum visibility.

 

Meanwhile, tinted strips may help distinguish different zones or support specific operational needs.

 

However, colour should never replace important safety signage.

 

How Do Cold Room Curtains Work Technically?

The main function of cold room curtains is to reduce uncontrolled air exchange.

 

When the insulated door remains open, a natural two-way airflow develops.

 

Cold air has higher density. Therefore, it tends to escape through the lower portion of the doorway.

 

Meanwhile, warmer air enters through the upper portion.

 

As a result, a continuous air-exchange cycle develops.

 

PVC strips interrupt this circulation.

 

Although they do not create an airtight seal, they reduce the effective open area.

 

Consequently, air movement decreases compared with a fully open doorway.

 

Moreover, when a person passes through, only a limited section opens.

 

Therefore, the complete doorway does not remain exposed.

 

What Refrigeration Loads Result From Door Openings?

Door openings create both sensible and latent loads.

 

Sensible load results from the temperature difference between the warm air and the cold room.

 

Meanwhile, latent load comes from moisture entering with humid outside air.

 

Consequently, the refrigeration system must remove both heat and moisture.

 

In freezer rooms, moisture can create additional problems.

 

For example, it can freeze on:

• Evaporator coils
• Door frames
• Floor surfaces
• Ceiling areas
• Panel joints

 

Therefore, proper doorway control can reduce avoidable refrigeration load.

 

How Do You Select PVC Strip Width and Thickness?

PVC curtain selection depends on doorway height, traffic, temperature and operating environment.

 

Typical commercial strip widths may include:

• 200 mm
• 300 mm
• 400 mm

 

Likewise, common strip thicknesses may include:

• 2 mm
• 3 mm
• 4 mm

 

However, these dimensions represent general industry ranges rather than universal requirements.

 

For example, a small personnel doorway may use narrower and lighter strips.

 

Conversely, a tall warehouse opening may require wider and thicker strips.

 

Therefore, selection should balance stability and ease of access.

 

If strips become too heavy, workers may struggle to pass through them.

 

Moreover, heavy curtains can slow traffic.

 

Consequently, oversizing can create operational problems.

 

How Much Should PVC Strips Overlap?

Overlap has a major influence on performance.

 

Generally, greater overlap reduces air leakage.

 

However, greater overlap also increases resistance when people or equipment pass through.

 

Therefore, engineers must balance thermal performance and accessibility.

 

Typical arrangements may include:

• Light overlap
• Medium overlap
• Heavy overlap
• Full overlap

 

For example, a moderate-temperature chiller with light traffic may use less overlap.

 

Conversely, a freezer with a large temperature difference may require heavier overlap.

 

Therefore, overlap should match the actual application.

 

Why Does Strip Thickness Matter?

Thicker strips usually resist movement caused by pressure differences and air currents more effectively.

 

However, they also become heavier.

 

Therefore, engineers should consider:

• Door height
• Traffic type
• Traffic frequency
• Ambient airflow
• Room temperature
• User comfort

 

For pedestrian access, excessively thick strips can become inconvenient.

 

Meanwhile, warehouse traffic may require heavier material.

 

Should PVC Curtains Touch the Floor?

PVC strips should normally finish close to the final floor level.

 

Otherwise, cold air can escape through the lower gap.

 

Because cold air settles downward, floor-level leakage can become significant.

 

However, strips should not drag heavily across the floor.

 

Excessive contact can create:

• Dirt accumulation
• Faster wear
• Difficulty passing through
• Strip deformation

 

Therefore, installers should measure the final floor level before cutting the material.

 

Furthermore, uneven floors may require individual strip adjustment.

 

Why Is the Mounting System Important?

The suspension system carries the full weight of the curtain.

 

Therefore, installers should secure the mounting rail properly.

 

Common mounting arrangements may use:

• Stainless steel rails
• Galvanised steel rails
• Hook-on strip systems
• Bolt-mounted suspension plates

 

Furthermore, installers should avoid weakening insulated panels.

 

If they penetrate the panel, they should seal the penetration correctly.

 

Otherwise, warm humid air may enter the insulation system.

 

Consequently, condensation and moisture damage may occur.

 

PVC Strip Curtains vs Air Curtains

PVC strip curtains and air curtains both reduce air exchange. However, they work differently.

 

PVC provides a physical flexible barrier.

 

In contrast, an air curtain uses a controlled air stream across the doorway.

 

Selection Factor	PVC Strip Curtain	Air Curtain
Barrier method	Physical PVC strips	Directed airflow
Power requirement	None	Electrical power
Initial cost	Usually lower	Usually higher
Personnel access	Good	Excellent
Trolley access	Good	Excellent
Forklift access	Possible	Very convenient
Visibility	Through transparent strips	Completely open
Physical contact	Yes	No
Maintenance	Cleaning and strip replacement	Fan and motor maintenance
Freezer use	With correct PVC grade	Requires engineered selection
Noise	Very low	Fan noise possible
High traffic	Moderate to good	Very good when designed correctly

 

Therefore, neither option is universally better.

 

Instead, engineers should select the system according to operating requirements.

 

How Does an Air Curtain Work?

An air curtain uses fans to discharge a high-velocity stream of air across the doorway.

 

The air jet should travel across the full opening.

 

Furthermore, it should maintain enough velocity to resist air movement between the two temperature zones.

 

However, performance depends on several factors.

 

These include:

• Door height
• Door width
• Air velocity
• Air volume
• Jet angle
• Temperature difference
• Pressure difference
• Crosswinds
• Building ventilation
• Exhaust fans
• Traffic volume

 

Therefore, selecting an air curtain only according to door width can lead to poor performance.

 

Why Is Air Velocity Important?

If the discharge velocity is too low, the air jet may not reach the opposite side.

 

Consequently, warm and cold air can mix.

 

However, excessive velocity can also create turbulence.

 

Therefore, air curtain design requires proper balance.

 

The air stream should remain stable enough to create separation without causing unnecessary mixing.

 

What Types of Air Curtains Are Available?

Several air-curtain designs can serve commercial and industrial facilities.

 

Ambient Air Curtains

Ambient units use surrounding air without adding heat.

 

Therefore, they often suit refrigerated areas better than heated models.

 

Heated Air Curtains

Some buildings use electrically heated or hot-water air curtains.

 

However, heated air can increase refrigeration load around a cold-room entrance.

 

Therefore, engineers should assess such systems carefully before applying them to refrigerated spaces.

 

Recirculating Air Curtains

Recirculating systems collect discharged air and return it to the fan section.

 

Consequently, they can provide better control in certain demanding applications.

 

However, these systems require more ductwork and installation space.

 

Therefore, they generally suit larger facilities.

 

When Should You Choose PVC Curtains?

PVC cold room curtains often provide a practical solution when:

• Traffic remains moderate
• The opening is relatively small
• Personnel use the doorway frequently
• Small trolleys pass through
• Budget remains important
• Electrical supply is not preferred
• Physical separation is acceptable

 

Furthermore, PVC curtains require relatively simple maintenance.

 

Therefore, they remain popular in commercial cold rooms.

 

When Should You Choose an Air Curtain?

Air curtains often make more sense when:

• Forklifts pass frequently
• Traffic remains high
• Operators require unrestricted movement
• Physical strips interfere with products
• Hygiene procedures discourage physical contact
• Clear visibility is essential

 

However, the air curtain must be designed correctly.

 

Otherwise, turbulent airflow may increase mixing rather than reduce it.

 

Therefore, correct positioning and discharge direction remain essential.

 

What Happens in Freezer Rooms?

Freezer entrances require greater attention because moisture can freeze.

 

Consider a freezer operating at -20°C while the surrounding area remains warm and humid.

 

When the door opens, humid air enters.

Immediately, moisture can condense on cold surfaces.

 

Then, because surface temperatures remain below freezing, moisture can form frost or ice.

 

Consequently, operators may notice:

• Frost around door frames
• Ice near entrances
• Evaporator frosting
• Slippery floors
• Longer defrost cycles
• Increased compressor operation

 

Therefore, freezer-grade cold room curtains can support better doorway control.

 

Can Curtains Reduce Defrost Frequency?

Curtains may help reduce moisture infiltration.

 

Consequently, less moisture may reach the evaporator.

 

Therefore, frost accumulation may reduce under certain operating conditions.

 

However, curtain performance depends on:

• Door opening duration
• Traffic volume
• Ambient humidity
• Evaporator design
• Defrost control
• Curtain condition

 

Therefore, operators should not treat curtains as a replacement for proper defrost design.

 

Can Cold Room Curtains Replace an Insulated Door?

No.

 

Cold room curtains provide secondary protection.

 

Meanwhile, the insulated door provides the primary thermal barrier.

 

Therefore, operators should close the insulated door whenever continuous access is not required.

 

A properly designed cold-room door should also include:

• Insulated door leaf
• Suitable gasket
• Correct hardware
• Safety release
• Proper alignment
• Thermal-break detailing

 

Furthermore, freezer doors may require frame heaters and pressure relief arrangements.

 

Where Can Cold Room Curtains Be Used?

Cold room curtains can support many applications.

 

For example:

• Modular coldroom
• Combi coldroom
• Visi coldroom
• Medical coldroom
• Refrigerated containers
• Skid mounted cold room
• Refrigerated warehouses
• Pre-cooler cold rooms
• Ripening chambers
• Blast chillers and freezers
• Container coldrooms
• Food-processing rooms
• Supermarket cold storage
• Pharmaceutical cold rooms
• Distribution centres

 

However, each application requires a separate assessment.

 

How Should Technicians Inspect Cold Room Curtains?

Curtain inspection should form part of preventive maintenance.

 

First, technicians should inspect strip alignment.

 

Next, they should look for gaps.

 

Additionally, they should inspect whether each strip returns to its normal hanging position.

 

Technicians should also check:

• Torn PVC
• Cracks
• Surface scratches
• Hardened strips
• Missing strips
• Poor overlap
• Loose mounting rails
• Bent hooks
• Excessive floor clearance
• Poor wall penetrations

 

Furthermore, cleaning is important.

 

Dust, grease and food residue reduce visibility and hygiene.

 

Therefore, facilities should clean curtains according to operating conditions.

 

When Should PVC Strips Be Replaced?

There is no fixed replacement period.

 

Instead, operators should assess strip condition.

 

For example, strips may require replacement when they:

• Remain permanently bent
• Become brittle
• Tear excessively
• Lose transparency
• Develop deep scratches
• Fail to overlap
• Become too short
• No longer return to position

 

Therefore, condition-based replacement provides better results than fixed calendar replacement.

 

How Do Curtains Affect Industrial Refrigeration?

Doorway infiltration affects refrigeration load regardless of compressor technology.

 

Therefore, entrance control matters in systems using:

• Semi-hermetic compressors
• Reciprocating compressors
• Screw compressors
• Industrial refrigeration
• Ammonia refrigeration
• Glycol & water chillers

 

Large refrigeration capacity does not justify unnecessary heat gain.

 

Consequently, engineers should coordinate the curtain, door, insulation, evaporator and refrigeration system.

 

Cold Room Curtains in UAE and GCC Conditions

A cold room UAE installation may operate under high temperature and humidity.

 

Likewise, cold storage Dubai facilities can experience heavy loading traffic and high ambient moisture.

 

Therefore, doorway protection becomes especially important.

 

Whether a customer searches for a cold room manufacturer Abu Dhabi, cold room supplier Al Ain, or the best cold room supplier in Sharjah, engineers should evaluate the complete refrigeration system.

 

Similarly, the same principles apply when selecting a:

• Cold room manufacturer in GCC
• Cold room manufacturer in Oman
• Cold room installation in Bahrain
• Cold room manufacturer in Saudi Arabia
• Cold room manufacturer in Qatar
• Cold room manufacturer in Kuwait
• Cold room supplier in India
• Cold room supplier in UK
• Cold room supplier in Africa

 

Although climate conditions differ, heat and moisture always move toward the colder environment.

 

Therefore, doorway design remains important in every region.

 

Why Snowland?

Snowland treats cold room curtains as an important part of the complete refrigeration and cold-storage system. Our engineering approach considers the specific operating conditions of each facility to recommend a suitable entrance protection solution.

We evaluate factors such as room and ambient temperatures, relative humidity, door dimensions, traffic volume, personnel and forklift movement, product handling, PVC material rating, strip thickness and width, curtain overlap, and insulated door design. We also consider refrigeration capacity, evaporator performance, and defrost requirements to ensure that the curtain works effectively with the overall refrigeration system.

 

Snowland provides integrated solutions for modular cold rooms, commercial cold storage, industrial refrigerated warehouses, blast chillers and freezers, medical cold rooms, pre-coolers, refrigerated containers, and skid-mounted refrigeration systems.

 

This comprehensive approach allows clients to select cold room curtains as part of a complete cold-storage solution, helping maintain temperature stability, reduce unnecessary cold-air loss, and support efficient refrigeration performance.