Pre-Filter
A pre-filter, also known as a coarse filter, is the first line of defense in an air filtration system. It is typically located at the very beginning of an air conditioning or fresh air system, primarily responsible for filtering larger particulate pollutants from the air.
Regularly cleaning or replacing the pre-filter is the simplest and most economical maintenance measure to keep the entire air system operating efficiently and stably.
| Material | Specification | Advantages | Application |
| Filter media: polyester fiber + metal frame | Foldable, bag-style | It serves as the first line of defense in an air filtration system, protecting the internal HEPA and activated carbon filters. It is reusable and represents the lowest-cost yet most cost-effective and indispensable component of the entire air filtration system. It minimizes airflow obstruction and has low fan energy consumption. | The first filter at the return air vent or fresh air vent |
Main Functions and Roles
Protecting Downstream Equipment: This is its core function. It captures large particles such as hair, dust, catkins, and insect carcasses, preventing these substances from entering and clogging downstream medium-efficiency filters, high-efficiency filters, and the heat exchangers (coils) and fans of the air conditioning system. This extends the lifespan of these more sophisticated and expensive devices and maintains system efficiency.
Preliminary Air Purification: Provides basic, preliminary air purification for indoor air, removing visible suspended particles.
Reduced Operating Costs: Due to the low cost of pre-filters, replacing them regularly is much more economical than cleaning or replacing clogged medium-efficiency or high-efficiency filters and repairing the air conditioning system.
Pre-filters are ubiquitous, found in almost all equipment or systems involving air circulation:
Residential/Commercial Central Air Conditioning Systems
Fresh Air Systems
Clean Rooms (e.g., electronics factories, pharmaceutical workshops, operating rooms)
Industrial Ventilation Equipment
Air Intake Pretreatment for Air Compressors, Gas Turbines, etc.
Filtration Efficiency: Relatively low, primarily targeting particles larger than 5μm (micrometers).
Resistance/Airflow Resistance: Very low, minimizing impact on airflow and ensuring smooth system ventilation.
Dust Holding Capacity: High, capable of holding a large amount of dust.
Cost: Low, typically disposable or washable and reusable.
Contact Information
- Email
- Tel
+86 18018607834
- Address
No. 779 Changhong Rd.,
Baoshan District, Shanghai China
