Primary Air Filter Cotton 1 Piece per Package Product overview Product name: Primary Air filter Cotton Filter material: Polyester Fiber (PET) Size (thickness x width x length): 3 mm x 1 m x 1 m Package quantity: 1 piece per package Key benefits and why you need it Captures large airborne particles: Designed to filter atmospheric particulate matter of 5 micrometers or larger, reducing dust and suspended solids before they reach finer filters or equipment. Protects downstream components: Acts as a primary or prefilter to extend the service life of secondary filters, fans, blowers, and other HVAC or air handling components. Robust operating range: Suitable for use in temperatures from 10 to 120 degrees Celsius and relative humidity up to 80 percent, allowing use in a variety of indoor and light industrial environments. Chemical tolerance: Compatible with slightly acidic and slightly alkaline air conditions, making it suitable where mild chemical exposure is expected. Simple specification and fit: Supplied as a flat sheet at 3 mm thickness and 1 m by 1 m dimensions for straightforward installation or replacement where this size is required. Material and performance Polyester Fiber (PET): Durable synthetic fiber construction that provides structural stability while capturing coarse dust and suspended matter. Filtration function: Intended as a primary filter to remove larger particulates, reducing load on finer filtration stages and lowering maintenance frequency for downstream filters. Typical applications and use scenarios HVAC prefilter: Installed in air handling units and ventilation systems in offices, shops, and light commercial buildings to trap lint, dust, and large particulate before the main filter stage. Air purifier prefilter: Used as the first stage in standalone air purifiers to collect hair, textile fibers, and coarse dust, preserving the performance of the main HEPA or fine filter. Workshop and light industrial ventilation: Deployed in workshops, production areas, and maintenance spaces to capture sanding dust, machining debris, and other suspended particulates before they enter ventilation equipment. Selection and handling notes Use within specified conditions: Operate within the temperature and humidity ranges shown and avoid exposure to strongly corrosive gases or conditions beyond slightly acidic or alkaline air. Size consideration: Provided as a 3 mm x 1 m x 1 m sheet. Confirm compatibility with the filter housing or frame before installation. Disposal and replacement: according to system maintenance schedules or when visibly loaded with dust. Dispose of used material according to local waste handling practices. This primary air filter cotton is intended for coarse particle filtration in ventilation and air handling applications where a polyester fiber prefilter of the specified size and performance is required.