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Step into a perfectly climate-controlled environment with the S3 Stainless Steel Series Air Curtain. Designed to meet the rigorous demands of high-traffic commercial spaces, this unit acts as a powerful, invisible shield over any entrance. The moment the doors open, a robust, high-velocity cascade of air sweeps down, effectively dividing the interior and exterior into two distinct temperature zones. This seamless curtain of air not only preserves the crisp, cool conditioning of summer or the cozy warmth of winter but also acts as an impenetrable fortress against street dust, flying insects, and noxious exhaust fumes. Crafted with a smooth, cool-to-the-touch stainless steel exterior, the unit exudes a modern, minimalist aesthetic that effortlessly integrates into upscale architectural designs. Beneath its polished surface lies a meticulously engineered pure copper motor driving a centrifugal fan, emitting a steady, reassuring hum that blends into the background while delivering unparalleled airflow. By preventing energy loss and maintaining pristine indoor air quality, this air curtain significantly reduces HVAC operational costs, making it an indispensable asset for facilities focused on long-term efficiency and superior occupant comfort.

S3 New Air Curtain is suitable for high grade restaurants, hotels, clubs, shops and commercial buildings. Apply centrifugal fans with a high-performance pure copper motor to maximize the effect.
Elevate your facility's operational efficiency and environmental control with our meticulously engineered air curtain. Every component is selected to deliver maximum performance, longevity, and user satisfaction, making life more comfortable inside.
Uncompromising Thermal Separation: Generates a high-speed air current that acts as an invisible door, locking in cool or warm conditioned air and drastically reducing electricity expenses.
Comprehensive Environmental Shield: Efficiently blocks outdoor pollutants, providing excellent dust and insect-proofing while protecting against smoke and noxious fumes.
Accelerated Air Circulation: Promotes healthier indoor air quality by continuously moving and purifying the air within the entrance zone.
Whisper-Quiet Operation: Utilizes an advanced fan design to produce immense air pressure with minimal vibration, keeping noise levels unobtrusive.
Seamless Integration: The flat, low-profile design ensures the unit remains visually appealing, perfectly complementing the sophisticated interiors of modern commercial establishments.
Our engineering team has meticulously refined every aspect of this air curtain to meet the exacting standards of large-scale commercial procurement. From the exterior finish to the internal mechanics, the S3 series is built for uncompromising performance.
Constructed with a newly developed flat stainless steel cover, the unit boasts a rugged, rust-proof exterior that is remarkably easy to clean and maintain. Its sleek, minimalist design language perfectly matches the sophisticated decor of high-end restaurants, luxury hotels, clubs, and modern commercial buildings, instantly elevating the entrance's aesthetic appeal.
At its heart lies a high-performance pure copper motor coupled with a centrifugal airflow fan, delivering a formidable air velocity of up to 20m/s. This robust airflow effectively halts indoor-outdoor air exchange. For specialized environments, an optional DC motor is available, offering superior adaptability to high-humidity and corrosive conditions while further reducing manufacturing costs and operational energy consumption.
To accommodate diverse architectural layouts, the series is available in six distinct lengths ranging from 920mm to 2000mm. The standardized, compact cross-section (212x225mm) streamlines the installation process, allowing multiple units to be seamlessly aligned side-by-side to cover exceptionally wide entrances with ease.
Operation is effortless with the standard two-speed upgraded remote control, allowing users to switch between high and low speeds freely. For ultimate automation, the system supports an optional magnetic door switch (Auto ON/OFF). This enables a seamless "start upon opening, shut down upon closing" linkage with both weak and strong electricity doors, significantly enhancing daily convenience and maximizing energy savings.
An optional high-density filter net can be integrated into the air inlet to filter the air, trapping dust particles, bacteria, and other unclean objects before they enter the facility. Despite its immense power, the acoustic engineering keeps operational noise as low as 49dB, ensuring the commercial environment remains peaceful and comfortable for guests.
Model | Voltage V/ HZ | Input power (W) | Air Volume (m3/h) | Air Speed (m/s) | Noise (dB) | Net W. (Kg) | Size (mm) | ||||
Hi | Low | Hi | Low | Hi | Low | Hi | Lo | ||||
| FM-3509S3-L/Y | 220~ 240 /50
| 230 | 200 | 1100 | 900 | 16 | 13 | <52 | <49 | 11 | 920 x212 x225 |
FM-3510S3-L/Y | 250 | 220 | 1200 | 1000 | <52 | <49 | 12 | 1000 x212 x225 | |||
FM-3512S3-L/Y | 290 | 260 | 1500 | 1200 | <53 | <50 | 13 | 1200 x212 x225 | |||
FM-3515S3-L/Y | 380 | 350 | 1900 | 1500 | <55 | <53 | 17.5 | 1530 x212 x225 | |||
FM-3518S3-L/Y | 450 | 420 | 2280 | 1800 | <57 | <54 | 21 | 1800 x212 x225 | |||
FM-3520S3-L/Y | 470 | 440 | 2520 | 2100 | <58 | <56 | 24.5 | 2000 x212 x225 | |||
Model | Voltage V/ HZ | Input power (W) | Air Volume (m3/h) | Air Speed (m/s) | Noise (dB) | Net W. (Kg) | Size (mm) | ||||||
Hi | Low | Hi | Low | Hi | Low | Hi | Lo | ||||||
FM-4009S3-L/Y | 220~ 240 /50 | 300 | 270 | 1400 | 1000 | 20 | 16 | <57 | <54 | 13 | 920 x212 x225 | ||
FM-4010S3-L/Y | 320 | 290 | 1550 | 1100 | <57 | <54 | 13.5 | 1000 x212 x225 | |||||
FM-4012S3-L/Y | 400 | 370 | 1900 | 1500 | <58 | <55 | 15.5 | 1200 x212 x225 | |||||
FM-4015S3-L/Y | 500 | 470 | 2300 | 1900 | <61 | <58 | 20 | 1530 x212 x225 | |||||
FM-4018S3-L/Y | 600 | 570 | 2850 | 2250 | <63 | <61 | 23.5 | 1800 x212 x225 | |||||
FM-4020S3-L/Y | 620 | 590 | 3255 | 2855 | <64 | <62 | 27 | 2000 x212 x225 | |||||



Making life more comfortable inside
Theodoor Air Curtain produces a high speed air current, dividing the inside and outside of the room into two independent temperature zones with the result that levels of interior air conditioning is maintained and the air is purified whilst energy is saved. Summer heat, winter cold, dust, insects, smoke, unpleasant odors and exhaust fumes are all kept out.
Prevent the loss of cool or warm air whilst economizing on electricity.
Efficient dust and insect-proofing..
Protect against smoke and noxious fumes.
Accelerate air circulation


OPTIONAL FUNCTIONS OF THEODOOR AIR CURTAIN:
Generally used for the equipment to start and control speed at high performance requirements, which need high manufacturing cost, have good performance and good adaptability for humidity and corrosion environment.
The air inlet of the air curtain is provided with high density filter net, filtering air, blocking dust, bacteria and other unclean objects.


3. AUTO ON/OFF DOOR SWITCH
Magnetic door switch is an additional switch device, which can be used for remote control and key switch type air curtain. The air curtain will start automatically when the door opened and shut down automatically after the door is closed.
Theodoor air curtain can be combined with weak or strong electricity door switch, and it is more convenient and energy-saving.
Selecting the right climate control infrastructure is a critical decision for facility managers and large-scale project developers. We provide more than just equipment; we deliver comprehensive, long-term value tailored to professional procurement standards.
Direct Manufacturing Excellence: By sourcing directly from our production floor, you benefit from stringent quality control, consistent manufacturing standards, and highly competitive procurement economics.
Robust Supply Chain: Our streamlined production capabilities ensure that even the most substantial volume requirements are met with precision and punctual delivery, keeping your projects on schedule.
Tailored Engineering Solutions: We understand that no two facilities are identical. Our technical team is equipped to provide customized configurations, from specialized DC motor options to specific filtration requirements.
Dedicated Post-Deployment Support: We stand behind our engineering with comprehensive technical assistance, ensuring your maintenance teams have the resources they need for seamless long-term operation.
Proven Global Track Record: Our climate control systems are trusted by leading hospitality chains, retail conglomerates, and transportation hubs worldwide, reflecting our commitment to enduring quality.