AirX 6 Feet Air Curtain: FM-3518S-L/Y-MC Centrifugal Model for Wide Commercial Entrances

Open doorways leak conditioned air constantly. Every time a door stays open, heat, dust, insects, and humidity move freely between inside and outside. This raises energy bills, forces HVAC systems to work harder, and makes entrance areas uncomfortable for staff and customers.

The AIRX FM-3518S-L/Y-MC solves this problem at the source. It is a centrifugal air curtain built for 1800 mm (72-inch) wide doorways. The unit pushes a strong, continuous stream of air across the entrance, forming an invisible barrier that reduces the exchange of indoor and outdoor air when doors remain open.

This page explains what the model does, how it performs, and where it fits best. Everything below is grounded in the unit’s actual specifications.

What the AirX 6 Feet Air Curtain Does

An air curtain is a fan-driven device mounted above a doorway. It directs a downward sheet of air across the opening, separating two environments without a physical door. This means climate-controlled air stays inside while outside air, dust, and pests stay out.

The FM-3518S-L/Y-MC uses centrifugal fan technology instead of a standard axial fan. Centrifugal fans move air by spinning it outward through a scroll housing, which produces steady pressure across the full width of the opening. This enables consistent airflow from one edge of the doorway to the other, not just in the center.

At 1800 mm, the model covers a full 72-inch entrance in a single unit. The 6 Feet air curtain design suits doorways where a narrower model would leave gaps at the sides and allow air to escape.

Why Centrifugal Fan Technology Matters

Axial fans are common in budget units, but they lose pressure across wide spans. On a 72-inch doorway, that weakness shows up as uneven coverage and a broken barrier.

Centrifugal fans hold their pressure better across wider openings. The result is a more uniform air stream that stays effective from edge to edge. For a wide entrance, this difference determines whether the barrier actually works or simply moves air around.

Key Features of the AirX 72 inch Centrifugal Air Curtain

The AirX 72 inch Centrifugal Air Curtain is built for high-traffic commercial doors that stay open through the working day. Its core features are:

• Centrifugal fan technology for strong, consistent airflow across the full opening
• 1800 mm / 72-inch width sized for wide single-door and double-door entrances
• 220V single-phase electrical supply for standard commercial wiring
• 60Hz operating frequency
• Design intended for commercial and entrance applications
• Continuous air barrier that reduces unwanted air exchange through open doors
• Support for improved indoor environmental control in busy spaces
• Overhead mounting above commercial doorways

Each feature points to one outcome: a stable barrier that keeps conditioned air where it belongs.

Technical Specifications

The table below lists the confirmed specifications for the FM-3518S-L/Y-MC. Use it to verify electrical compatibility and doorway fit before purchase.

The 220V single-phase supply matches standard commercial outlets, which means most sites can install the unit without upgrading their electrical service.

Where the AirX 6 Feet Air Curtain Fits Best

Wide entrances face the most air loss because the opening is large and traffic is frequent. The FM-3518S-L/Y-MC targets exactly these locations. Its 180 cm air stream creates a barrier sized for the full doorway rather than a partial one.

The unit suits the following environments:

• Retail shops with wide glass entrances and steady foot traffic
• Commercial buildings and lobbies with large main doors
• Offices where the front entrance stays open during business hours
• Restaurants that need to keep insects and street air out of dining areas
• Warehouses and loading areas with large operational doorways
• Other high-traffic entrances where doors open and close all day

In each case, the goal is the same. Keep conditioned air inside, keep outside air and contaminants out, and reduce the load on the building’s heating and cooling system.

Fit and Installation Considerations

Match the curtain to the doorway. The 6 Feet air curtain format is intended for openings close to 1800 mm wide. A unit narrower than the doorway leaves unprotected gaps at the sides, which weakens the barrier.

Mount the unit directly above the door and as close to the frame as practical. Correct height and placement keep the air stream aimed straight down across the opening. This positioning is what allows the airx air Curtain to seal the entrance effectively.

Benefits of Installing an Air Curtain

An air Curtain delivers measurable operational value in busy commercial spaces. The main benefits are:

• Lower energy loss — the barrier reduces conditioned air escaping through open doors, which eases HVAC workload.
• Cleaner interiors — the downward air stream helps keep dust, exhaust fumes, and airborne debris outside.
• Fewer flying insects — the moving air discourages insects from entering, a practical advantage for restaurants and food handling areas.
• Steadier indoor comfort — customers and staff near the entrance feel fewer temperature swings.
• Continuous access — doors can stay open for traffic without giving up climate control.

These outcomes matter most where doors cannot stay closed. A retail store or a warehouse with constant movement cannot rely on a shut door to hold its climate. The air Curtain fills that gap.

How the AirX 72 inch Centrifugal Air Curtain Compares to Standard Models

Standard air curtains often use axial fans and target narrow residential or small commercial doors. They struggle on wide openings where pressure has to hold across a longer span.

The AirX 72 inch Centrifugal Air Curtain is built for the opposite case. Its centrifugal fan and 1800 mm width address wide entrances directly. This means a single unit covers a 72-inch door without stacking two smaller models side by side.

For businesses with large doorways, one correctly sized unit is simpler to install, wire, and maintain than multiple smaller units. This is the practical reason wide-format buyers choose the airx air Curtain over general-purpose alternatives.

Frequently Asked Questions

What doorway width does the FM-3518S-L/Y-MC cover?
The unit is designed for 1800 mm (72-inch) wide doorways. It covers a full 6-foot opening as a single unit, so no second curtain is needed for standard wide doors.

What power supply does this air curtain need?
It runs on 220V single-phase power at 60Hz. This matches common commercial wiring, so most sites can install it without electrical upgrades.

Does an air curtain replace a physical door?
No. It reduces air exchange while a door is open, but it does not seal the opening like a closed door. Its purpose is to protect climate control during the hours a door stays open.

Can this model be used in restaurants?
Yes. The moving air stream helps keep insects and street air out of dining and food-prep areas, which is a common reason restaurants install a 6 Feet air curtain over their entrance.

Where should the unit be mounted?
Mount it directly above the doorway, close to the frame, so the air stream aims straight down across the full opening. Correct placement is essential for an effective barrier.

Is this unit suitable for warehouse doors?
Yes. The 72-inch width and centrifugal fan suit large operational doorways in warehouses and loading areas where doors open frequently throughout the day.

Does an air curtain save energy?
It reduces the volume of conditioned air escaping through open doors. This lowers the workload on heating and cooling systems, which supports lower energy use over time.

Summary

The AIRX FM-3518S-L/Y-MC is a centrifugal air curtain sized for 72-inch commercial entrances and wired for 220V single-phase, 60Hz supply. It forms a continuous air barrier that limits the exchange of indoor and outdoor air through open doors. For shops, offices, restaurants, warehouses, and other high-traffic entrances, the AirX 6 Feet air curtain keeps conditioned air inside and outside contaminants out, matching the demands of a wide, busy doorway with a single correctly sized unit.