Factory Cardboard Frame G3 G4 Air Filter Replacement Air Conditioner HVAC AC Furnace Filters

1. High-density pre-filter, made of 500g/㎡ polyester fiber material, 30% denser than ordinary pre-filters. It can filter hair, cotton fluff, and large dust particles, protecting the HEPA filter from clogging and extending the overall filter core's lifespan. It is washable, and the filtration efficiency remains unchanged after cleaning. Compatible with the pre-filter layer of various purifiers, it can be replaced separately at a low cost, making it a "durable pre-filter guardian" for household purifiers.

2.Supports custom sizes, compatible with ventilation and purification equipment of different brands and models
Easy to clean and replace, convenient and worry-free maintenance
Washable materials (such as non-woven fabric, nylon mesh) can be reused, and the filtration effect does not decline after washing

Applicable to household air conditioners, fresh air systems, and air purifiers Compatible with large ventilation ducts in commercial buildings, factories, hospitals, hotels, etc.

Customizable with special functions such as flame retardancy and anti-static, meeting industrial-level requirements

4.Stable filtration efficiency, ensuring a significant reduction in dust content in the air entering the downstream, guaranteeing the effectiveness of subsequent purification stages,Washable materials (such as non-woven fabric, nylon mesh) can be reused, and the filtration effect does not decline after washing