4-79 Centrifugal
Ventilation Fan
The 4-79 centrifugal ventilation fan is used in factory buildings, workshops, warehouses, machinery rooms and large indoor spaces where air supply, exhaust air discharge or general air exchange is required.
This series is suitable for clean air and ordinary non-corrosive gas conditions. Before selection, please confirm airflow, total pressure, medium temperature, dust content, duct layout, outlet direction and motor requirements.
Ventilation Fan for Indoor Air Exchange Systems
The 4-79 series is mainly selected for ordinary indoor ventilation tasks. In a project, it can work as an air supply fan to introduce fresh air, or as an exhaust fan to remove used air from workshops, buildings and enclosed equipment areas.
Unlike special-purpose fans for flue gas, dust collection, corrosion or explosion-proof sites, the 4-79 fan is intended for relatively clean and non-aggressive airflow. This makes the medium condition an important checkpoint before quotation.
For replacement projects, old nameplate data, existing duct size, motor power and outlet direction can help QIYUE FAN compare the current working point and review whether a 4-79 model is suitable.
Check the Air Condition Before Model Selection
Clean or Ordinary Air
Suitable for common air exchange, air supply and exhaust ventilation without corrosive or flammable gas risk.
No Viscous Substance
The conveyed gas should not contain sticky material that may adhere to the impeller or casing.
Dust Content Control
Dust and hard particles should normally be within 150 mg/m³ for ordinary ventilation selection.
Temperature Control
The gas temperature should not exceed 80°C. Hot gas projects should be reviewed separately.
Air Supply or Exhaust: Confirm the System Layout
Fresh Air Delivery
Used to deliver air into workshops, buildings, equipment rooms or process areas when the duct layout requires positive air supply.
Used Air Discharge
Used to discharge ordinary indoor air, heat accumulation or general exhaust air from enclosed spaces under non-corrosive conditions.
Air Exchange Balance
Used as part of a ventilation system where air inlet, exhaust outlet and duct resistance must be balanced together.
Key Data for 4-79 Fan Selection
4-79 Fan Performance Range
The following data is for preliminary comparison. The final model should be confirmed after checking the actual system resistance and required ventilation volume.
Note: Performance data is for preliminary selection. Please send detailed airflow, pressure and working conditions before quotation.
Information Needed for 4-79 Fan Selection
To avoid selecting a fan only by model name, please prepare the following information before quotation. These points help confirm the working point, motor configuration and installation arrangement.
1. Airflow Demand
Required m³/h or existing fan air volume.
2. Pressure Requirement
Total pressure, static pressure or duct resistance.
3. Air Condition
Temperature, dust content, humidity and gas composition.
4. Installation Direction
Outlet angle, rotation direction, motor position and base layout.
Where 4-79 Fans Are Commonly Used
Factory Buildings
General air supply and exhaust for ordinary industrial buildings.
Production Workshops
Air exchange support where the gas is not corrosive or explosive.
Warehouses
Air circulation and exhaust assistance for enclosed storage areas.
Machinery Rooms
Ventilation support for heat discharge and indoor air replacement.
Large Building Spaces
Air delivery or exhaust for large indoor ventilation systems.
Replacement Projects
Replacement of old general ventilation fans after checking nameplate data and site layout.
Special Working Conditions Need Special Fan Series
For dust concentration beyond ordinary ventilation limits. Boiler & High Temperature Fans
For hot gas, flue gas and high-temperature exhaust. Corrosion Resistant Fans
For chemical exhaust and corrosive gas conditions. Explosion Proof Fans
For flammable or explosive gas risk areas.
For another general ventilation option, buyers may also review the 4-72 centrifugal ventilation fan according to airflow and installation requirements.
FAQ About 4-79 Centrifugal Ventilation Fan
Is the 4-79 fan used for air supply or exhaust?
It can be used for both air supply and exhaust ventilation, depending on the duct system and project layout.
What gas conditions are suitable for 4-79 centrifugal fans?
The gas should be non-flammable, harmless and non-corrosive, without viscous substances. Dust and hard particles should normally be within 150 mg/m³.
What if the gas temperature is higher than 80°C?
For gas temperature above 80°C, a boiler fan or high-temperature fan should be reviewed instead of selecting a standard 4-79 ventilation fan directly.
How can QIYUE FAN check a replacement model?
Please send the old fan nameplate, airflow, pressure, motor power, rotation direction, outlet angle, photos and installation dimensions for comparison.
Tel / WeChat / WhatsApp: +86 15653305981 | Email: sales@qiyuefan.com
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