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Flat Air Filters

Flat air filters are commonly used in HVAC systems, automotive engines, and industrial air filtration applications. These filters are designed to trap airborne particles, including dust, pollen, and other contaminants, improving air quality.

  • Frame Material: Galvanized Sheet, Stainless Steel, Aluminum Sheet.
  • Filter Media: Fiberglass, Polyester or Synthetic Fiber, Cotton, Activated Carbon, Electrostatic Media, HEPA (High-Efficiency Particulate Air) Material.
  • Size: Customized.
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Description

The frame of flat air filters is made of aluminum alloy or galvanized steel, and the bracket is made of high-strength cold-drawn aluminum wire. The filter structure is firm and not easy to deform. The outer frame and bracket can be reused. The future maintenance only needs to replace the filter element, which greatly reduces the operating cost.
The frame of flat air filters is made of aluminum alloy or galvanized steel, and the bracket is made of high-strength cold-drawn aluminum wire. The filter structure is firm and not easy to deform. The outer frame and bracket can be reused. The future maintenance only needs to replace the filter element, which greatly reduces the operating cost.

Common Size

Nominal Size (inches)Actual Size (mm)Rated Airflow (m/s)Initial Pressure (Pa)Final Pressure (Pa)AVerage arrestance  (%)Filter Object (um)Filtration class
12*24*2295*595*461600<40≤25095≥5G4
20*20*2495*495*462200<40≤25095≥5G4
20*24*2495*595*462700<40≤25095≥5G4
24*24*2595*595*463200<40≤25095≥5G4

Filter Media and Performance

MaterialPropertiesApplicationsAdvantagesLimitations
FiberglassMade from fine,spun glassfibers. Lowefficiency.Basic residential HVAC systems.Inexpensive, lightweight.Poor at trapping small particles, low efficiency.
Polyester/Synthetic FiberWoven or bonded synthetic fibers. Higher efficiency than fiberglass.Residential, commercial HVAC, automotive filters.Durable, effectivefor smallerparticles,pleatable formore surfacearea.More expensive, needs regular replacement.
CottonNatural fiber, often woven or bonded.Some residential, industrial filters.Environmentally friendly, reusable in some cases.Less effective for fine particles compared to synthetics.
Activated CarbonCarbon granules combined with fiber. Absorbs odors and VOCs.Areas with strong odors or chemicals (e.g., kitchens).Odor removal,VOC absorption.Requires frequent replacement, higher cost.
Electrostatic MediaSynthetic fibers with electrostatic charge that traps fine particles.Residential, commercial HVAC for improved air quality.Can capture fineparticles, reusableoptions available.Requires washing to maintain effectiveness.
HEPA MaterialDense layer of fibers, typically fiberglass or synthetic. Captures 99.97% of particles 0.3microns or larger.Clean rooms, medical facilities, high-efficiency purifiers,Very high filtration efficiency.Expensive,needs more frequent replace ment in high-dust environments.

Applications

Hospital, Pharmaceutical plants, Chip plants, Stockbreeding, Glass screen factory, Photovoltaic plants, PCB factory, Painting booth, Semi-conductor plant, Manufacturing Plant, Machinery Repair Shops, Food & Beverage Factory, Home Use, Construction works, Energy & Mining. Such as:

  • Fresh air unit and ventilation system of central air-conditioning.
  • Special constant-temperature and constant-humidity air conditioning units for program-controlled exchanges and computer rooms.
  • Pre-filtration system for air compressors and gas turbines.
  • Pre-filtration system for HEPA filters.
Philite® Specializes in High-quality Flat Air Filters Our filtration products have passed SGS and ISO9001 certification and are exported to Europe, North America, Southeast Asia, Africa and other regions. With our emphasis on quality and after-sales service, we have won a good reputation in the filtration industry.

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