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Salle blanche HVAC et équipement de manutention de l'air
Ventilateur d'échappement centrifuge de toit
A curb-mounted centrifugal exhaust fan that protects its motor and wheel beneath a weather-resistant hood while discharging clean air downward across the roof surface.
- Weather-Resistant Spun Hood
- Backward-Inclined Centrifugal Wheel
- Downblast Roof Discharge
- Gasketed Curb Mounting
Introduction de produit
The centrifugal roof exhaust fan mounts above a roof opening and draws building air upward through a curb into a backward-inclined wheel. A spun weather hood shields the motor, drive and wheel from rain, while the surrounding windband directs discharge downward toward the roof. The removable hood, ventilated motor compartment and prepunched curb cap provide an accessible outdoor exhaust solution for cleanroom support spaces and general clean-air ventilation.
Key Features
The backward-inclined centrifugal wheel develops greater static pressure than a simple roof propeller for longer duct systems.
Outside cooling air circulates around the motor compartment instead of relying only on the warm exhaust stream.
A square curb cap with mounting holes and perimeter gasket creates a repeatable sealed connection to the roof curb.
Préoccupations du client produit
Roof exhaust equipment must resist weather, keep water out of the duct opening and provide enough pressure for the vertical riser below it.
Rain entering the roof opening can wet insulation and contaminate the connected exhaust duct.The overlapping spun hood, windband and raised curb position shield the inlet from direct precipitation.
A roof propeller loses airflow when a filter, damper or long riser adds resistance.The centrifugal wheel provides a broader pressure capability for ducted exhaust than a low-pressure propeller arrangement.
Outdoor motors overheat when hot exhaust air recirculates through the motor compartment.A separated ventilated motor cover draws cooling air from outside the exhaust path.
Inspecting belts and bearings requires lifting a heavy one-piece fan from the roof curb.The removable or hinged weather hood exposes the drive assembly while the curb base and duct connection remain in place.
Les applications typiques
Cleanroom gowning and support-area exhaustLaboratory general clean-air ventilationPharmaceutical warehouse and utility-room exhaustMechanical-room heat removalCommercial clean-process roof extraction
Paramètres techniques
Representative construction ranges for a curb-mounted centrifugal downblast roof exhaust fan are provided below.
| Matériaux de base | Galvanized steel curb base with a backward-inclined steel wheel and corrosion-resistant spun aluminum weather hood |
|---|---|
| Panneau épaisseur | 1.2-2.5 mm typical hood, windband and curb-cap material thickness |
| Largeur effective | 600-2200 mm nominal roof curb and fan base width |
| Longueur maximale | Up to 2600 mm overall curb-base length according to fan size |
| Acier face épaisseur | 1.2-2.5 mm galvanized steel curb cap, motor plate and internal support sheet |
| Densité Core | Approximately 7800-7900 kg/m³ for the galvanized steel base and wheel components |
| Conductivité thermique | Approximately 45-55 W/(m·K) for the galvanized steel structural components |
| surface finie | Natural spun aluminum hood with dark green powder-coated base and galvanized internal support surfaces |
| Type joint | Bolted square curb cap with perimeter gasket, prepunched mounting holes and removable hood fasteners |
| Customisation | Disponible en fonction de l'application prévue et de l'environnement d'exploitation. |
Options disponibles
Direct-drive or belt-drive centrifugal wheelHinged base, motorized damper and extended roof curbBirdscreen, disconnect switch and weatherproof wiring channelCoastal-duty coating and stainless exterior fasteners
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