Based on filtering effectiveness and design, filters in HVAC systems can be classified into the following categories:
1.Pre-Filters (Coarse Filters)
Pre-filters are primarily used to remove larger particles from the air, such as dust, dirt, hair, and debris. These filters usually do not offer very high filtration efficiency, but they help extend the lifespan of subsequent filters, serving a protective function.
Materials: Fiber, metal mesh, etc.
Effect: Removes larger particulate matter.
2.Medium Efficiency Filters (Intermediate Filters)
Medium efficiency filters remove medium-sized particles such as smaller dust, pollen, smoke particles, etc. These filters have higher efficiency than pre-filters and better air permeability, making them suitable for environments that require good air quality.
Materials: Glass fiber, synthetic fibers, etc.
Effect: Removes most smaller particles.
3.High-Efficiency Particulate Air (HEPA) Filters
HEPA filters can remove 99.97% of particles that are 0.3 microns and larger. They are extremely important in air purification, particularly in environments with very high air quality requirements such as hospitals, laboratories, and clean rooms.
Materials: Multi-layer fibers, paper media.
Effect: Nearly removes all fine particles, ideal for environments requiring highly clean air.
4.Activated Carbon Filters
Activated carbon filters are used to remove gaseous pollutants from the air, such as harmful gases, odors, volatile organic compounds (VOCs), and more. These filters rely on adsorption to remove harmful molecules from the air.
Materials: Activated carbon.
Effect: Removes harmful gases, odors, etc.
5.Electrostatic Filters
Electrostatic filters use the attraction of electric charges to remove particles from the air. These filters do not rely on physical barriers but instead capture particles in the filter mesh through the electric field.
Materials: Charged materials such as polyester or polypropylene.
Effect: Highly efficient, especially in removing fine particles.
The filtration section of air filters is typically made of fiberglass paper or pleated filter paper, framed with cardboard or stainless steel plates to ensure sufficient stability and rigidity. Air filters are usually installed in specific locations within return air ducts, such as in hallways or large ceiling vents in homes. These air filters act as protective barriers to prevent small particulate pollutants from entering the HVAC system or air circulation system, thus providing clean air and protecting the HVAC system.
Key Considerations for Purchasing HVAC Filters
When purchasing new air filters for your HVAC filtration system, you should consider the following factors:
1.Correct Size: Determine the correct size by comparing with the dimensions of your existing filters and reviewing the equipment's manual for the specifications.
2.Appropriate Filtration Level: Choose the right filtration level for your system. We welcome you to contact us via phone or email. Our experts will assist you in customizing a tailored filtration solution for your needs.
Feel free to reach out for further consultation!
