Jet fans

Commercial ventilation jet fans are specialized axial fans designed to manage air movement in enclosed or semi-enclosed spaces like underground car parks, tunnels, and large transit terminals. They operate by creating a jet of air that induces airflow throughout the space without the need for extensive ductwork.

Key Features:

• Compact design: Mounted directly on ceilings or walls, saving space.
• High thrust output: Moves air over long distances effectively.
• Smoke extraction capability: Critical for emergency ventilation in fire scenarios.
• Low maintenance: Fewer moving parts and no ducting simplifies upkeep.

Common Applications:

• Underground parking garages
• Road and rail tunnels
• Enclosed loading bays
• Emergency smoke and fume control systems

Jet fans are vital for ensuring air quality, visibility, and safety in confined commercial environments where traditional ventilation systems are impractical.

Jet Fans – Modern Ventilation and Smoke Extraction for Underground Garages

Jet fans (impulse fans) are a modern, energy-efficient, and flexible solution for ventilation in multi-level and underground parking garages. They serve as an effective alternative to traditional ducted ventilation systems.

By operating in a ductless configuration, jet fans ensure:

• even distribution of air,
• full control of air quality,
• significant savings in both space and operating costs.

Efficient Ventilation and Smoke Extraction with Jet Fans

A key advantage of jet fan systems is simplified operation and maintenance. The same units can be used not only for daily ventilation but also for smoke extraction in case of fire, which improves safety and functionality of the entire system.

Sustainable and Safe Ventilation for Parking Facilities

Jet fans are fully aligned with modern sustainable building practices, providing:

• optimized energy consumption,
• reduced installation costs compared to duct systems,
• enhanced fire safety and user protection,
• compliance with the latest building standards.

Thanks to their versatility, jet fans ensure a high level of safety and comfort for users of underground and multi-story parking garages.

Space Optimization and Garage Architecture with Jet Fans

Jet fans significantly improve both the functionality and aesthetics of parking garages by eliminating the need for extensive duct networks. This allows for maximum use of available space and lower construction costs.

Key Benefits of Ductless Jet Fan Systems

• More parking spaces – removal of ventilation ducts increases clearance height and allows for additional parking spots.
• Reduced construction volume – lower floor-to-floor height reduces excavation depth and the use of structural materials.
• Improved safety and visibility – open, duct-free layouts provide drivers with better visibility and an enhanced sense of security.

Reduced Investment and Operating Costs

A jet fan ventilation system delivers significant financial savings during both construction and operation phases. By eliminating costly components and optimizing energy use, jet fans provide tangible economic benefits.

• No need for expensive ductwork or fire dampers, reducing initial investment costs compared to ducted systems.
• Lower airflow resistance allows the use of smaller, energy-efficient exhaust fans, minimizing electricity consumption.
• Simpler electrical connections and fewer system components mean faster installation and lower maintenance costs.

Energy Efficiency and Demand-Controlled Ventilation (VOD) with Jet Fans

Jet fans are highly energy-efficient thanks to precise control and reduced airflow resistance. With demand-controlled ventilation (VOD), the system minimizes energy use during normal operation, ensuring both cost savings and sustainability.

 How Demand-Controlled Jet Fan Ventilation Works

• Individual jet fans are activated only in response to signals from gas detectors, reducing operating hours and power consumption in daily ventilation mode.
• A lower SFP (Specific Fan Power), achieved by eliminating duct resistance, directly lowers electricity bills.

Simplified Installation, Service, and Maintenance

Installing and maintaining jet fans is much easier compared to traditional ducted systems. Their modular design and easy accessibility reduce time and costs for installation, servicing, and future upgrades.

• Fans are mounted directly to the ceiling slab – no need for suspended ducts or additional supports.
• Access from ceiling level simplifies inspections, while the absence of ductwork eliminates costly duct cleaning.
• Modular construction allows for phased investment and easy future system modernization.

Acoustic Comfort and Aesthetics in Parking Garages with Jet Fans

A jet fan ventilation system not only improves air quality and safety but also enhances the acoustic comfort and visual appearance of parking areas. Reduced noise levels and discreet fan design increase the overall attractiveness of the facility.

Reduced Noise Levels in Parking Areas

• Smaller impeller diameters and the absence of turbulent duct sections help minimize noise in underground and multi-level garages.
• Quiet operation creates a more comfortable and user-friendly environment for drivers and pedestrians.

Modern and Discreet Design

• The compact housing of jet fans ensures a clean and aesthetic look in garage spaces.
• This is particularly important in shopping centers and Class A office buildings, where visual appeal directly influences user experience and property value.

Jet Fans in Smoke Extraction Mode

Jet fans are specifically designed to operate efficiently in smoke extraction mode, ensuring rapid smoke removal in the event of a fire. Their high temperature resistance and quick response time guarantee safe evacuation routes for building occupants.

 High Temperature Resistance and Compliance

• Properly selected jet fans can operate at 300–400 °C for 120 minutes, in compliance with EN 12101-3, fulfilling the requirements for smoke extraction systems.

Fast System Response for Maximum Safety

• A response time of less than 10 seconds after a fire detector signal helps maintain a smoke-free layer at the height of evacuation routes, ensuring safe conditions for escape and rescue operations.

Flexible Operation with Reversible Jet Fans

• Reversible jet fan models allow controlled smoke direction without the need for major system modifications, providing greater flexibility and efficiency during fire emergencies.