High-Volume Roof Ventilation Fan for Industrial, Agricultural and Commercial Buildings

The YTE-PRF-400B is a high-volume plastic roof exhaust fan designed for continuous ventilation and air exchange in industrial, agricultural and commercial environments.

With a rated air volume of 4,980 m³/h, 300 W input power and a compact roof-mounted structure, the unit is designed to remove accumulated hot air, humid air, airborne contaminants and odors from enclosed or semi-enclosed spaces.

Its lightweight housing and square mounting base make the PRF-400B suitable for roof ventilation applications where simple installation, continuous air movement and relatively low electrical consumption are required.

It is particularly suitable for factories, warehouses, agricultural buildings, greenhouses, livestock facilities and other environments requiring large-volume air exchange.

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4,980 m³/h High-Volume Roof Exhaust

The YTE-PRF-400B provides a rated airflow of:

4,980 m³/h

The fan continuously extracts indoor air through the roof, helping establish an upward exhaust path for warm, humid or contaminated air.

For large buildings, multiple units can be distributed across the roof according to building volume, heat generation, moisture load and the required air-change rate.

This makes the system suitable for both localized roof exhaust and multi-unit whole-building ventilation layouts.

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Designed for Roof-Mounted Ventilation

The PRF-400B uses a vertical cylindrical fan body combined with a square mounting base, allowing the unit to be positioned directly on a suitable roof opening or mounting curb.

The upper weather-cover structure helps protect the fan opening while maintaining an exhaust air path.

Compared with wall-mounted exhaust arrangements, roof exhaust can make use of the natural tendency of warm air to rise and can be useful where high-level heat and humidity accumulation are the primary ventilation problem.

Final roof opening, curb construction, waterproofing and installation details should be determined according to the actual building structure.

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Plastic Housing for Demanding Environments

The PRF Series is designed around a plastic roof-fan structure.

For industrial and agricultural applications, a plastic exterior can be advantageous in environments where the fan may be exposed to humidity or other demanding operating conditions.

The supplier documentation specifically positions this fan family for use in environments including agriculture, livestock buildings, factories, warehouses and locations affected by moisture or corrosive gases.

The actual suitability of the fan for a specific corrosive chemical environment should still be confirmed according to the gas composition and concentration present at the installation site.

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Low-Power, High-Airflow Ventilation

The PRF-400B combines:

300 W input power
195 W output power
4,980 m³/h rated airflow

This configuration is intended for applications where continuous large-volume air circulation is required without the substantially higher energy demand associated with active refrigeration or air-conditioning equipment.

The PRF-400B is therefore a ventilation device rather than a refrigeration system.

It does not actively cool the air.

Instead, it removes accumulated indoor heat and replaces indoor air when adequate make-up air is available.

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1,410 r/min Operating Speed

The fan is specified at:

1,410 r/min

The supplier documentation states that fan blades undergo dynamic balancing inspection to improve operating stability and reduce vibration.

The documented quality-control process also includes several inspection items such as:

• Noise inspection
• Vibration inspection
• Rotational concentricity inspection
• Blade-speed inspection
• Machine-efficiency inspection
• Airflow inspection

These checks are intended to support stable operation and consistent fan performance.

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Integrated Leakage Protection

The supplied product information specifies:

Power supply with leakage protection switch

This provides an additional electrical-protection function for the fan.

Electrical installation should still be completed according to local electrical regulations and appropriate upstream circuit-protection requirements.

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Typical Applications

The YTE-PRF-400B is suitable for general exhaust and ventilation applications including:

Industrial Facilities
Factories, production workshops and processing areas requiring heat and air removal.

Warehouses
For exhausting accumulated warm or humid air from large storage spaces.

Greenhouses
For ventilation and air exchange where internal temperature and humidity must be managed through airflow.

Agricultural Buildings
Suitable for general agricultural ventilation applications.

Livestock and Poultry Facilities
For continuous air exchange and removal of accumulated heat, humidity and odors.

Mushroom Growing Facilities
Applicable where controlled air exchange is required as part of the overall environmental system.

Food and Agricultural Processing Areas
For general ventilation where large-volume exhaust is required.

Textile and Light Industrial Workshops
For heat, humidity and general process-air removal.

Other Large Enclosed Spaces
Where roof-mounted exhaust ventilation is preferable to wall-mounted ventilation.

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Ventilation, Not Mechanical Cooling

It is important to distinguish the PRF-400B from an air conditioner or evaporative cooler.

The fan can assist with:

Heat exhaust
Removing warm indoor air.

Humidity exhaust
Removing moisture-laden indoor air when drier replacement air is available.

Odor removal
Increasing air exchange in spaces where odors accumulate.

Dust and contaminant dilution
Supporting ventilation where airborne contaminants need to be discharged.

However, its actual effect depends on outdoor conditions, available make-up air and the overall ventilation-system design.

The unit does not actively refrigerate, dehumidify or humidify the air.

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Technical Specifications

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PRF-400 Series Variants

The YTE PRF-400 platform is available in several structural configurations.

The three versions share the same listed electrical and airflow performance, while their external mounting structures differ.

For project selection, YTE can recommend the appropriate version according to roof structure and installation requirements.

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Ventilation System Design

A roof fan should not be selected based only on the nominal airflow of a single unit.

For engineering applications, the required fan quantity should be determined from factors such as:

Building volume
Required air changes per hour
Indoor heat load
Humidity generation
Process exhaust requirements
Occupancy
Outdoor conditions
Make-up air openings
Existing mechanical ventilation

As a simplified engineering relationship:

Required Exhaust Airflow = Room Volume × Required Air Changes per Hour

The final design should also verify that sufficient replacement air can enter the building.

Without adequate make-up air, actual exhaust airflow can be significantly lower than the nominal free-air performance.

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Installation Considerations

For proper roof installation, the project should consider:

A structurally suitable roof opening or curb
Weatherproof flashing around the penetration
Reliable mechanical fastening
Correct electrical protection
Adequate maintenance access
Clear exhaust-air discharge space
Sufficient make-up air openings

Where rainwater ingress is a concern, the roof interface and waterproofing details should be designed as part of the building system rather than relying only on the fan housing.

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Maintenance

Routine inspection should include:

Checking whether the fan rotates smoothly
Inspecting the fan for abnormal vibration
Removing accumulated dust and debris
Checking electrical terminals
Checking the leakage-protection device
Inspecting mounting bolts and roof connections
Keeping the intake and discharge paths unobstructed

Maintenance frequency should be adjusted according to dust loading, operating hours and site conditions.

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Why YTE PRF Series?

The YTE PRF Series is designed for projects where the priority is straightforward, high-volume roof ventilation.

Key characteristics of the YTE-PRF-400B include:

4,980 m³/h airflow for high-volume air exchange.

300 W input power for continuous ventilation applications.

Square-base roof-mounted structure for practical installation.

1,410 r/min operating speed.

Leakage protection switch integrated into the supplied electrical configuration.

Plastic roof-fan construction for industrial and agricultural environments.

1-year product warranty according to the supplied product specification.

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Frequently Asked Questions

Is the YTE-PRF-400B an air conditioner?

No. It is a roof exhaust fan. It removes indoor air and promotes ventilation but does not use a refrigeration circuit to actively cool the air.

Can it reduce indoor temperature?

It can help remove accumulated hot air, particularly when outdoor air is cooler than indoor air. Actual temperature reduction depends on outdoor temperature, heat load, building design and available make-up air.

Can it remove humidity?

It can exhaust humid indoor air. Actual humidity reduction depends on the moisture content of the incoming replacement air. It is not a mechanical dehumidifier.

What is the rated airflow?

The listed rated air volume is 4,980 m³/h.

What power supply is required?

The supplied specification lists 220V / 50Hz.

What is the difference between PRF-400A, PRF-400B and PRF-400G?

The supplied documentation shows the same electrical specifications, speed and airflow for all three models. Their external mounting structures differ, and their listed package dimensions are also different.

How many units are required for a building?

The quantity should be calculated according to building volume, required air-change rate, heat and moisture load and make-up air conditions. YTE can assist with project sizing when these parameters are provided.

What is the warranty?

The supplied product documentation specifies a 1-year warranty.