A busy receiving entrance may open dozens of times during a delivery window. Employees may continuously move between the kitchen and dining room. Walk-in cooler doors open throughout prep and service, while exterior entrances can expose conditioned interiors to outdoor temperatures, airborne debris, and flying insects.
Air curtains, strip doors, and swing doors all help manage these transition points, but they do so in different ways.
Air curtains, or air doors, create a directed stream of air across an open doorway. When correctly selected and installed, that airflow can help reduce the exchange of indoor and outdoor air and, in suitable applications, help deter flying insects from crossing the opening. This can make them useful at frequently opened exterior or service entrances where installing a permanent physical barrier would interfere with traffic.
Strip doors use overlapping flexible strips to create a physical partition employees or carts can pass through. They're particularly useful for walk-in coolers, freezers, stockrooms, and light-industrial traffic areas because the opening doesn't need to remain completely exposed every time someone passes through it.
Swing doors create a more substantial physical separation while allowing frequent two-way movement. Depending on the door and application, they can help divide kitchens, service areas, stockrooms, prep spaces, and customer-facing areas without requiring employees to stop and operate a conventional door handle every time they pass.
Together, these products address a larger operational question: How much separation does this opening need without disrupting the traffic moving through it?
Operational Considerations
What are you trying to keep separated?
Start with the boundary itself. Are you trying to reduce outdoor air entering an air-conditioned building? Retain cold air around a walk-in? Separate a kitchen from a service corridor? Reduce exposure to flying insects at a receiving entrance? Or simply create a convenient physical division between two high-traffic areas? Once the problem is clear, the appropriate product family becomes much easier to identify.
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Are you losing conditioned air through a frequently opened doorway?
Observe how long the opening remains exposed during a normal shift. Receiving doors, employee entrances, walk-ins, and busy service passages can remain open surprisingly often. If heating or cooling is escaping every time traffic passes through, adding an appropriate secondary barrier may help reduce unnecessary air exchange.
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Is this for a walk-in cooler or freezer?
Cold-storage applications deserve particular attention. A compatible strip curtain can provide an additional barrier when the main walk-in door is open, reducing the amount of unrestricted air exchange during employee traffic. Measure the complete opening and confirm that the strip material is appropriate for the temperatures and application involved.
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What moves through the doorway?
Consider bus carts, hand trucks, ingredient carts, racks, palletized deliveries, and other equipment. The opening and barrier need to accommodate the widest and tallest routine traffic, not merely an employee walking through empty-handed.
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Do employees need visibility through the opening?
Two-way traffic creates collision risks if employees can't see who's approaching. For swing doors and some strip-door applications, consider visibility, clear materials, windows where available, and how traffic approaches from either side.
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Are you addressing an insect-control problem?
Air-door performance depends on factors such as doorway dimensions, mounting position, environmental conditions, and equipment specifications. Choose a model specifically intended for the application and follow manufacturer installation guidance.
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Decision Support
This category includes several fundamentally different ways to manage an opening. Begin by choosing the barrier type, then narrow the products according to dimensions, traffic, environment, installation, and performance requirements.
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Choose Air Curtains for Open-Door Air Management: Air curtains can make sense where an opening needs to remain physically unobstructed while reducing unwanted air exchange. Look at the doorway's width and height, recommended mounting height, airflow performance, installation orientation, electrical requirements, and intended application. A unit needs to create an effective air stream across the entire opening. An undersized air curtain may leave parts of the doorway inadequately covered.
- Match Air Curtain Performance to Mounting Height: Mounting height matters. The air stream needs sufficient velocity and coverage to reach the opposite side of the opening effectively. Compare the manufacturer's recommended installation range with the actual doorway rather than selecting a model based on width alone. For exterior applications, wind and building pressure can also affect performance.
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Consider Recessed or In-Ceiling Installations: Some facilities prioritize a cleaner architectural appearance or have limited room for exposed equipment above the doorway. Compatible in-ceiling or recessed air-curtain configurations and covers can integrate the system more discreetly into the surrounding space. However, appearance shouldn't compromise service access. Make sure filters, motors, controls, and other maintenance points remain accessible according to manufacturer requirements.
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Look at Air Doors Designed for Environmental Control: Specialized air-door systems, including certain microshield-style configurations, may be designed around particular doorway or environmental-control applications. Instead of comparing them solely by airflow numbers, determine what the manufacturer intends the system to accomplish and whether that matches your entrance conditions.
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Choose Strip Doors for Pass-Through Physical Separation: Strip doors can be particularly practical where employees or equipment need to move through an opening without operating a conventional door. For walk-ins, personnel openings, and light-industrial traffic, compare opening dimensions, strip width, strip thickness, overlap, material, temperature suitability, and mounting configuration.
- Select Strip Material for the Environment: A strip curtain used at a normal interior personnel doorway has different operating conditions from one installed at a walk-in freezer. Verify the material's rated temperature and intended application. Cold-storage environments can affect material flexibility, so this specification shouldn't be treated as an afterthought.
- Choose Swing Doors Around Traffic Flow: Swing doors are particularly useful for frequent movement between operational zones where a more substantial physical barrier is appropriate. Consider single- versus double-door configurations, opening dimensions, swing behavior, panel material, windows where available, impact resistance, and the type of traffic passing through. A restaurant kitchen entrance may prioritize rapid two-way employee movement, while a stockroom receiving area may need to accommodate carts and heavier traffic.
KitchenRestock also offers free shipping, a 30-day price match guarantee, and financing on qualifying purchases over $300 for commercial foodservice and facility equipment.
Business Applications
| High-volume restaurants |
Quick-service restaurants |
Full-service restaurants |
| Commercial kitchens |
Hotel kitchens |
Resorts |
| Catering facilities |
Commissary kitchens |
Central production kitchens |
| Bakeries |
Supermarkets |
Grocery stores |
| Delicatessens |
Butcher shops |
Seafood markets |
Operations with walk-in coolers and freezers are particularly strong candidates for strip-door systems because employees may enter cold storage repeatedly throughout a shift. Restaurants with busy kitchen-to-dining-room passages may have a stronger use case for commercial swing doors, particularly where servers and kitchen employees require frequent hands-free passage between operational zones.
Meanwhile, exterior receiving doors, customer entrances, loading areas, and other frequently opened exterior passages may justify an appropriately designed air curtain when controlling air exchange or flying-insect entry is a priority.
Larger operations may use all three, but in different places. A facility might use an air curtain at the receiving entrance, strip doors inside the walk-in cooler, and swing doors between the kitchen and service corridor. The products aren't necessarily alternatives to one another. Each solves a different type of boundary problem.
Frequently Asked Questions
What is an air curtain?
An air curtain, also called an air door, produces a directed stream of air across an opening. When properly selected and installed, it can help reduce air exchange between two environments while allowing people and equipment to pass through without a physical obstruction.
Can air curtains keep insects out?
Certain properly designed air curtains can help deter flying insects from entering through open doorways. Performance depends on equipment selection, installation height, airflow, doorway conditions, wind, and other environmental factors. They should be used as part of a broader sanitation and pest-management strategy.
Does an air curtain sanitize the air?
No. An air curtain primarily creates an airflow barrier. Unless a specific product includes separately documented air-treatment capabilities, it shouldn't be treated as equipment that sterilizes or sanitizes the air.
What is the difference between an air curtain and a strip door?
An air curtain uses moving air and leaves the opening physically unobstructed. A strip door uses overlapping flexible strips to create a physical partition that employees or equipment pass through. The better option depends on the environment and traffic requirements.
Are strip doors good for walk-in coolers?
They can be. Properly selected strip curtains can provide an additional barrier at frequently accessed walk-in cooler openings. Verify opening dimensions, strip material, overlap, temperature rating, and installation requirements.
Can strip curtains be used in walk-in freezers?
Some are designed for low-temperature applications, but not every strip material is suitable for freezer conditions. Check the manufacturer's temperature rating before purchasing.
How do I measure for a strip door?
Measure the actual opening width and height and determine where the mounting hardware will be installed. Then compare those measurements with the product's coverage and installation requirements. Don't assume the nominal doorway size is sufficient.
What are commercial swing doors used for?
Commercial swing doors can separate frequently traveled operational areas while allowing employees to move between them efficiently. Common applications include kitchen entrances, service corridors, prep areas, stockrooms, and other high-traffic passages.
Should a commercial swing door have a window?
For busy two-way passages, visibility can be valuable because employees approaching from opposite sides can see one another before passing through. Whether a window is appropriate depends on the door design and application.
Which option is best for a busy restaurant kitchen entrance?
A commercial swing door may be appropriate where a physical partition is needed between the kitchen and another operational area while maintaining frequent employee passage. The best solution depends on doorway dimensions, traffic, visibility, and the separation required.
Which option is best for an exterior receiving door?
An appropriately specified air curtain may help reduce environmental air exchange or deter flying insects while the receiving door is open. Strip curtains may suit other receiving applications where a physical barrier is practical. Evaluate traffic and environmental conditions before deciding.
How do I size an air curtain?
Start with doorway width and mounting height. The selected unit needs to provide appropriate coverage and airflow across the opening according to manufacturer specifications. Exterior conditions and intended application should also be considered.
Do air curtains require electricity?
Powered air curtains generally have electrical requirements for their fans and controls, and heated models where applicable may have additional requirements. Verify voltage, phase, amperage, and installation specifications for the exact product.
Can I use an air curtain instead of a physical door?
That depends on the application and applicable building, fire, food-safety, energy, and other regulatory requirements. An air curtain shouldn't automatically be considered a legal or functional substitute for a required physical door.
Can air curtains, strip doors, and swing doors help reduce energy loss?
Properly selected products can help manage unwanted air exchange in suitable applications. Actual energy impact depends on doorway conditions, traffic, temperature differences, installation, equipment performance, and how the facility operates.
Can KitchenRestock help me decide which type of door or curtain I need?
Yes. KitchenRestock can help you compare air curtains, strip doors, and swing doors according to doorway dimensions, mounting requirements, temperature conditions, traffic volume, intended application, electrical requirements, and facility layout.
Can I buy air curtains, strip doors, and swing doors at wholesale pricing?
Yes. KitchenRestock offers wholesale purchasing and volume pricing for restaurants, hotels, supermarkets, commissaries, warehouses, institutional facilities, food-production operations, and other commercial buyers.
