Low resistance initial effect paper frame air filter is a disposable filter suitable for primary filtration in air conditioning and ventilation systems, mainly used to intercept dust particles larger than 5 μ m in the air. This product uses sturdy and moisture-proof cardboard as the outer frame, with foldable filter media as the core filtering unit. It has the characteristics of low initial resistance, large dust holding capacity, and economical price. It is a front-end filtering equipment in modern centralized ventilation and air conditioning systems

Low resistance initial effect paper frame air filterProduct Structure and Materials

1. Outer frame material

Made of moisture-proof and water-resistant wood fiber paperboard, it has high strength characteristics and is not easily deformed, broken or twisted under normal operating environment -1-7

Fix the filter material diagonally in front and back of the paper frame to ensure a tight bond between the filter material and the outer frame, preventing any airflow leakage -5-7

Common thickness specifications: 20mm (1 '), 46mm (2'), 96mm (4 ') and other options -2

2. Filter material

Mainly using polyester synthetic fibers or non-woven fabrics as filter materials-4-9

The filter material is treated with needle piercing technology to form a gradually layered structure, which has a high dust capture capacity and a long service life of -5

Moisture resistance is achievable, suitable for high humidity environments -4-5

Adhesive metal mesh on the air outlet surface to prevent vibration and ensure consistent folding spacing -5

3. Structural design

The filter material is folded and packed into high-strength die cut cardboard, with a filtration area 2-5 times that of a flat filter

The folding structure effectively increases the windward area, allowing the airflow to pass smoothly and evenly -1-9

IIILow resistance initial effect paper frame air filterProduct features and advantages

Characteristic dimensionSpecific advantages

Filtering performanceFilter dust particles larger than 5 μ m, and the efficiency of the weighing method can reach 90% -93% -1-6%

running resistanceThe initial resistance is as low as 18-70Pa (depending on specifications and air volume), saving system energy consumption by -2

Dust holding capacityLarge dust holding capacity, long service life, reduced replacement frequency -1-2

structural strengthThe outer frame is sturdy and moisture-proof, not easily deformed, ensuring long-term stable operation -1-6

economyDisposable design, no need for cleaning and maintenance, low overall cost of use -4-7

compatibilityGood universality, no need to change the original air conditioning box design, can be directly replaced -1

Efficiency level description:

G3 level: Average efficiency (colorimetric method) 30% -35%

G4 level: Higher average efficiency (colorimetric method), in compliance with EN779-4-6 standard

4、 Technical performance parameters

1. Conventional specifications and performance parameters -2-6-8

Actual size (mm)thicknessFilter area (m ²)Rated air volume (m ³/h)Initial resistance (Pa)Efficiency Level

595×595×4646mm（2'）1.75340060-70G3/G4

595×290×4646mm（2'）0.851500-170045-68G3/G4

594×594×9696mm（4'）2.66340068G4

595×595×2020mm（1'）0.88238070G3/G4

2. Operating conditions

Suggested final resistance: ≤ 225Pa-2

Moisture resistance: ≤ 90% -2

Maximum operating temperature: 80 ° C-4

Suggested wind speed: 350FPM (approximately 1.78m/s) -5

5、 Application scenarios

1. Building ventilation field

Air conditioning and central ventilation system primary filter -2-8

Pre filtration of ventilation systems in public places such as office buildings, shopping malls, airports, etc. -6

Subway ventilation system filter -10

2. Industrial and clean fields

Pre filtration of large air compressor -2-8

Program controlled switch and computer room dedicated constant temperature and humidity air conditioning -1-3

Cleanroom return air system and FFU inlet pre filtration -6-10

Pre filtration of HEPA/ULPA high-efficiency filtration device prolongs the lifespan of the back-end high-efficiency filter -1-6

3. Special applications

Spray painting system, spray painting workshop pre filter -6

Coarse filtration of factory exhaust gas and processing dust collection