GXF Type Inclined Flow Fan

The HTFC Series Cabinet Centrifugal Fan (External Motor) represents a thoughtfully engineered solution for buildings that need both reliable everyday ventilation and fire-safe smoke exhaust capability. Let us walk through what makes this fan different and why it matters for your facility.

Here is the key distinction: this fan comes in two main configurations—Type A and Type B. The Type A fan, which is what we are covering here, has the motor mounted outside the cabinet. This is not just a minor design choice—it is a critical safety feature. By keeping the motor external, the fan can handle extreme heat without damaging the motor or compromising performance. Type A fans have passed rigorous high-temperature testing and can operate continuously for over 60 minutes at 280°C. This makes them certified for fire smoke exhaust applications. Type B fans, by contrast, have the motor built inside the cabinet and are designed for standard ventilation only.

Now, why does this matter to you? In the event of a fire, building codes require smoke exhaust systems to keep running long enough for people to evacuate safely. The HTFC Cabinet Centrifugal Fan with external motor meets this requirement head-on. It has been tested by designated national fire product inspection authorities and has passed all required type inspections.

But this fan is not just for emergencies—it is a dual-purpose workhorse. When equipped with a dual-speed motor, the HTFC Cabinet Centrifugal Fan serves two roles in one unit. At low speed, it handles your daily ventilation needs—supply air, exhaust air, and air circulation for occupant comfort. At high speed, it kicks into fire smoke exhaust mode, clearing smoke and heat from escape routes. This one-fan-two-jobs approach saves you equipment costs, installation space, and maintenance overhead.

The fan's core component is a high-efficiency centrifugal impeller—available in forward-curved or backward-curved configurations depending on your specific model. The impeller is dynamically balanced to ensure smooth, vibration-free operation. The cabinet itself is constructed from high-quality galvanized steel with a durable protective coating. The box features a sound-insulated design with micro-perforated sound-absorbing panels and ultra-fine glass wool or other insulating materials to reduce operating noise.

The HTFC Series is available in twelve sizes ranging from 9" to 40" in diameter, with airflow capacities from 1,700 to 90,000 m³/h and total pressures from 200 to 1,300 Pa. The fan supports single-speed, dual-speed, and variable frequency drive (VFD) operation, giving you flexibility to match performance to actual demand. For dual-speed models, you get the best of both worlds—energy-efficient low-speed operation for everyday use and high-speed capacity for emergency situations.

Dual-Purpose Design (Ventilation + Fire Smoke Exhaust)
 – The HTFC Cabinet Centrifugal Fan with external motor serves two critical functions in one unit. At low speed, it handles daily supply air, exhaust air, and air circulation. At high speed, it provides fire smoke exhaust capability. This one-fan-two-jobs approach saves equipment costs, installation space, and simplifies system design.

High-Temperature Resistance
 – The external motor configuration allows this fan to operate continuously for over 60 minutes at 280°C. This high-temperature endurance has been verified through rigorous testing by designated national fire product inspection authorities, making the HTFC Cabinet Centrifugal Fan a certified solution for fire smoke exhaust systems.

High Efficiency
 – The high-performance centrifugal impeller delivers efficient airflow while reducing energy consumption. The fan's aerodynamic design ensures you move more air with less power—a direct benefit to your operating budget.

Low Noise Operation
 – The sound-insulated cabinet design minimizes operating noise and improves working comfort. The cabinet features micro-perforated sound-absorbing panels with ultra-fine glass wool or other insulating materials in the middle layer, significantly reducing noise transmission. Typical noise levels range from 56 to 75 dB(A) depending on the model and operating conditions.

Stable Operation
 – The dynamically balanced impeller ensures smooth operation with minimal vibration. Every impeller undergoes rigorous dynamic and static balancing, ensuring reliable performance and extended bearing life.

Compact Structure
 – The space-saving cabinet design allows easy installation in various ventilation systems. The compact footprint means you can install it in mechanical rooms where space is at a premium.

Easy Maintenance
 – The external motor configuration significantly simplifies inspection and routine maintenance. You can access the motor directly without opening the cabinet, making service faster and more convenient.

Robust Construction
 – The cabinet is manufactured from high-quality galvanized steel with a durable protective coating. The box uses a profile frame with拼装 design, providing excellent structural integrity and corrosion resistance.

Customization Available
 – Customized airflow, pressure, motor brands, cabinet dimensions, and electrical specifications are available. The fan can be equipped with single-speed, dual-speed, or VFD-ready motors. Optional accessories include silencers, filters, and control boxes. Explosion-proof configurations (EXdIIBT4) are available for flammable or explosive environments.

Commercial Buildings

The HTFC Cabinet Centrifugal Fan (External Motor) is widely used in office buildings, shopping malls, hotels, and commercial complexes. Its dual-purpose design makes it particularly valuable for these settings—it handles daily HVAC ventilation quietly and efficiently, while providing certified fire smoke exhaust capability in case of emergency. The low noise levels make it suitable for guest rooms, conference areas, and retail spaces.

Industrial Facilities

In factories, workshops, warehouses, and logistics centers, this fan provides robust ventilation for heat removal, fume extraction, and general air circulation. The external motor configuration and high-temperature endurance make it suitable for demanding industrial environments where fire safety is a concern.

Underground Facilities

Parking garages, equipment rooms, and civil defense projects benefit from the HTFC Cabinet Centrifugal Fan's compact design and fire-safe operation. Parking garages, in particular, require both continuous ventilation and fire smoke exhaust capability—exactly what this dual-purpose fan delivers.

Public Buildings

Hospitals, schools, airports, stadiums, and exhibition centers rely on this fan for consistent, quiet ventilation and certified fire protection. The dual-speed operation allows these facilities to maintain comfortable indoor air quality during normal operation while ensuring smoke exhaust capability during emergencies.

HVAC Systems

The fan is specifically designed for supply air, exhaust air, and smoke extraction in HVAC systems. It integrates seamlessly into central air conditioning systems, air handling units, and other HVAC equipment. The compact design makes it suitable for installation in mechanical rooms where space is at a premium.

High-Rise Buildings

For high-rise buildings, the HTFC Cabinet Centrifugal Fan with external motor is an ideal choice for stairwell pressurization, corridor smoke exhaust, and general building ventilation. Its certified high-temperature operation ensures compliance with fire safety codes for tall buildings.

The HTFC Series Cabinet Centrifugal Fan (External Motor) is designed for supply air, exhaust air, and smoke extraction in HVAC systems and fire protection applications. It improves air circulation, enhances indoor air quality, and provides reliable ventilation performance for commercial and industrial buildings.

The fan's primary functions include:

• Daily Ventilation (Low Speed) – Delivering fresh air into occupied spaces, removing stale air and contaminants, and maintaining comfortable indoor air quality during normal building operation

• Fire Smoke Exhaust (High Speed) – Clearing smoke and heat from escape routes during a fire emergency, operating continuously for over 60 minutes at 280°C to ensure safe evacuation

• Dual-Purpose Operation – Serving both everyday ventilation and emergency smoke exhaust needs in a single unit, eliminating the need for separate fans

• HVAC Integration – Functioning as a key component in central air conditioning systems, air handling units, and other HVAC equipment

By combining high-efficiency centrifugal impeller design with an external motor and sound-insulated cabinet construction, the HTFC Cabinet Centrifugal Fan ensures effective ventilation with certified fire safety performance. The fan's broad performance range means it can handle both low-resistance and high-resistance duct systems, making it a versatile solution for diverse ventilation and fire protection requirements.

Q: What is the difference between HTFC-A and HTFC-B?

A: HTFC-A features an external motor for easier maintenance, while HTFC-B has an internal motor for a more compact installation.

Q: Can the airflow and pressure be customized?

A: Yes. We provide OEM and ODM solutions based on project requirements.

Q: Is this fan suitable for smoke exhaust systems?

A: Yes. The HTFC-A external motor model can be configured for smoke exhaust applications.

Q: Are custom dimensions available?

A: Yes. Cabinet dimensions and technical specifications can be customized.

Q: What is the delivery time?

A: Standard products are generally delivered within 15–25 days, depending on the order quantity.

Q: Do you provide technical support?

A: Yes. Our engineering team provides product selection, installation guidance, and after-sales technical support.

Looking for a reliable cabinet centrifugal fan solution? Contact Jinan Hongpeng Ventilation Equipment Co., Ltd. today for professional consultation and competitive quotations.