The Low Profile Roof Exhaust Fan is a roof-mounted centrifugal exhaust fan designed for buildings with limited roof clearance, architectural height restrictions or a need to reduce equipment height above the roof.
Key Specifications
|
Parameter |
Specification |
|
Airflow |
500–35,000 CFM / 850–59,465 m³/h |
|
Static Pressure |
Up to 3.5 in. wg / 872 Pa |
|
Impeller Diameter |
12–54 in. / 305–1,371 mm |
|
Motor Power |
1/4–15 HP / 0.18–11 kW |
|
Drive |
Direct Drive / Belt Drive |
|
Voltage |
115 V / 208–230 V / 460 V / 575 V |
|
Phase |
Single-phase / Three-phase |
|
Frequency |
50 / 60 Hz |
|
Operating Temperature |
-29°C to 60°C; high-temperature options available |
|
Housing |
Spun Aluminum / Galvanized Steel |
|
Installation |
Roof Mounted |
Low-Profile Roof Design
The low-profile housing reduces the fan height above the roof, making it suitable for buildings with limited rooftop clearance or restrictions on equipment height.
The reduced roof projection also helps limit the visual and physical footprint of rooftop ventilation equipment.
Fan Construction
Impeller: Backward-curved centrifugal impeller for roof exhaust applications.
Housing: Heavy-gauge spun aluminum or galvanized steel construction.
Drive: Available in direct-drive or belt-drive arrangements to match different fan sizes and operating requirements.
Motor: AC motor options from 1/4 to 15 HP.
Curb Interface: Fan assembly connects directly to the roof curb at the building exhaust opening.
Roof Installation & Replacement
Roof Opening: Required roof opening dimensions for checking the fan base fit.
Roof Curb: Curb size, height and mounting dimensions for verifying the fan-to-curb connection.
Fan Base: Base dimensions and mounting-hole arrangement matched to the approved installation drawing.
Rooftop Clearance: Available clearance around the fan and discharge area.
Replacement Data: Existing manufacturer, model, nameplate, fan base and curb dimensions; installation photos can be provided for dimensional checking.
Drawing: GA or installation drawings can be supplied for dimensional confirmation before production.
Rooftop Protection & Accessories
Backdraft Damper: Gravity or motorized damper for limiting reverse airflow when the fan is not operating.
Bird Screen: Galvanized or stainless steel screen for the exhaust opening.
Roof Curb: Prefabricated curb matched to the fan base and roof opening.
Guards: Protective guards where required by the installation.
Disconnect: Disconnect switch for specified electrical installations.
Applications
Warehouses & Distribution Centers: Heat and stale-air exhaust.
Manufacturing Plants & Workshops: Process heat, fumes and airborne contaminants.
Commercial & Office Buildings: General building exhaust.
Institutional Buildings: Mechanical exhaust with rooftop height restrictions.
Multi-Story Parking Structures: Vehicle exhaust and heat removal.
Low-Clearance Roofs: Rooftop exhaust where equipment height is limited.
Customization
|
Customization Item |
Examples |
|
Fan Performance |
Specified airflow and static pressure operating point |
|
Fan Dimensions |
Non-standard fan base or overall dimensions |
|
Roof Curb |
Curb size, height and mounting dimensions |
|
Discharge Arrangement |
Specified discharge direction or rooftop layout |
|
Electrical |
Non-standard voltage, phase or frequency |
|
Controls |
Specified motor control or control interface |
|
Protection |
Bird screen, guards or other specified protection |
|
Identification |
Private-label nameplate, labels or packaging marks |
Supply Information
MOQ: 1 set for standard models; 10 sets for OEM orders.
Lead Time: 15–25 working days for standard orders; 25–40 working days for customized orders.
Sample: 1 set for model evaluation and installation verification.
Packaging: Export plywood case or reinforced carton, with protective packing for sample and production orders.
OEM: Private-label nameplates, labels and packaging marks.
Spare Parts
Motor
Replacement motor matched to the original fan specification.
Drive Components
Belts, pulleys and related components for belt-drive models.
Damper
Gravity or motorized backdraft damper.
Protection
Replacement bird screens and guards.
Matching
Spare parts are matched by fan model, motor nameplate or original order details.
FAQ
Q: What information should I compare when sourcing roof exhaust fans?
A: Compare airflow, static pressure, motor power, fan dimensions, electrical requirements, construction materials and roof connection details.
Q: Can I use this fan for a replacement project?
A: Yes. Replacement orders can be matched using the existing fan model, nameplate data and installation dimensions.
Q: What documents should I request before placing an order?
A: Request the GA drawing, performance data, motor datasheet, wiring diagram and installation instructions for project review.
Q: How do I verify the fan before shipment?
A: Check the ordered model, motor data, dimensions, impeller rotation, electrical operation and specified accessories against the approved order.
Q: What should be included in a commercial fan quotation?
A: A quotation should identify the fan model, airflow, static pressure, motor specification, electrical supply, accessories, quantity and delivery terms.
Q: Can I order spare parts together with the fan?
A: Yes. Common replacement components can be ordered with the fan or supplied for later maintenance.
Q: How should I identify the correct replacement parts?
A: Provide the fan model, motor nameplate or original order information when requesting replacement parts.
Q: What should I check when comparing suppliers?
A: Compare technical compliance, dimensional drawings, inspection records, documentation, lead time, packaging and spare-parts support.
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