A shopping mall in Manila, Philippines, specified 150 wall-mounted axial exhaust fans with automatic shutters for parking and retail ventilation, the order confirmed in October 2025.
Parking and retail ventilation in a tropical city such as Manila faces both vehicle exhaust and high humidity with salt-laden air, so enclosures and shutters must resist corrosion while the fans deliver high volume at low pressure directly through a wall without the cost and space of ducted systems. Automatic shutters add a passive barrier: they close the aperture when the fan stops, preventing draught and a security gap, and open as it runs, combining ventilation with building closure. Distributing the duty across 150 units lets each parking sector ventilate independently, so partial operation follows actual occupancy and contains a single failure to one bay rather than the whole extraction system.
Why Wall-Mounted Axial Fans with Shutters
Parking levels and service areas need reliable extraction of vehicle exhaust and heat, but when fans are off, the wall opening should not become a draught or security gap. Automatic shutters close the aperture when the fan stops and open as it runs, combining ventilation with a passive barrier. Axial fans suit this duty because they deliver high volume at low pressure directly through a wall, without the cost and space of ducted systems.
In a tropical Manila climate, humidity and salt air also stress enclosures, so ingress protection and corrosion resistance matter for service life. A fan that rusts through its mounting in two years is a maintenance liability in a busy mall where access means closing bays.
The distributed count matters. One hundred and fifty units let each parking sector ventilate independently, so partial operation matches actual occupancy rather than running the whole bank, which is both an energy and an acoustic benefit during quiet hours.
Specified Fan Configuration
The units were selected for the building's zone loads, outlined below.
| Parameter | Specified | Note |
|---|---|---|
| Type | Wall axial + shutter | Direct extract |
| Quantity | 150 units | Distributed zones |
| Airflow | Up to 12,000 m³/h | Per unit |
| Enclosure | IP54 protection | Humid climate |
The 150-unit count reflects a zoned strategy: many smaller fans let each parking sector ventilate independently, so partial operation matches actual occupancy rather than running the whole bank at full speed. That zoning also contains a failure: one stuck shutter affects one bay, not the entire extraction system.
IP54 enclosure protection resists dust and water spray, which suits both the humid outdoor face and the greasy, particle-laden parking-side air, extending service intervals and keeping the motor terminal box clean.
Checklist for Mall Exhaust Fans
Specifiers should confirm these points before releasing the order:
- Shutter action: Verify open/close with fan start and stop signals, and test the gravity close on power loss for safety.
- Zone control: Group fans so extraction follows occupancy, because a half-empty mall does not need full bank operation.
- Enclosure rating: IP54 or better for humid, salty air protects the motor and extends the service interval.
- Noise path: Wall fans radiate to both sides; plan for both the car park and the adjacent retail or residential space.
- Maintenance access: Shutters need periodic cleaning and lubrication, so specify accessible units in a busy mall.
- Spares commonality: Standardise on one or two models so the 150 units share motors and shutters for easy stock.
Significance for the Development
Keruite manufactures axial fans including the T35-11 series at its 80,000 m² Dezhou facility, and supplying 150 shutter-equipped wall units shows the product fitting a high-unit-count commercial job. With 30+ years of fan manufacturing and ISO 9001:2015 certification, the company supports distributed ventilation packages across its export markets.
For mall engineers, the lesson is to zone extraction so energy follows occupancy, not the worst-case whole building, and to specify enclosure protection for the local climate. the company supports the selection with in-house testing so each unit's quoted duty is measured, which matters when 150 of them must perform consistently.
For mall engineers, the checklist is to verify shutter open and close with the fan signals and gravity close on power loss, group fans so extraction follows occupancy rather than running the full bank, and specify IP54 or better enclosure protection for the humid, salty air that threatens motor life. Noise radiates to both sides of a wall fan, so plan for the car park and the adjacent retail or residential space, and standardise on one or two models so the 150 units share motors and shutters for easy spares. With 30+ years of fan manufacturing and ISO 9001:2015 certification at the 80,000 m² Dezhou facility, including the T35-11 axial series exported to 50+ countries, the company supports high-unit-count commercial jobs with in-house tested, consistent performance.
Engineers in Dezhou respond to selection enquiries within 24 hours, and the factory ships most standard fans from its 80,000 m² site within agreed lead times.