Sub-high efficiency air filter

Sub-high-efficiency filter is an air filter that uses ultra-fine glass fiber filter paper or polypropylene filter paper as filter material and is densely folded. It is located between the high-efficiency filter (HEPA) and the intermediate efficiency filter (MERV). According to the structure, it can be divided into two types: sub-high-efficiency filter with partition and sub-high-efficiency filter without partition.

Physical interception: Sub-high-efficiency filters usually use materials such as synthetic fibers, glass fibers, or microfibers as filter media. The fineness of these fibers can intercept suspended particles in the air, such as dust, pollen, mold spores, etc. As air passes through the filter media, particles are physically trapped on the fiber surface.
Depth filtration: Unlike primary filters, the filter media of sub-high-efficiency filters usually have deeper filtration layers, which allows particulate matter to be not only captured on the surface, but also intercepted in deeper filtration layers, thereby improving filtration efficiency.
Aerodynamic effects: The design of sub-high-efficiency filters also takes into account aerodynamic effects, such as airflow distribution and pressure loss. By optimizing the thickness of the filter media and the design of the airflow channels, filtration efficiency can be improved without affecting the airflow speed.

High filtration efficiency: The filtration efficiency of sub-high-efficiency filters is usually between 95% and 99.95%, and can effectively remove most particulate matter in the air.
Good sealing effect: The sub-high-efficiency filter uses high-quality sealing materials, such as new polyurethane sealant, to ensure good sealing between the filter frame and the installation frame to prevent air leakage.
Strong chemical stability: The filter media of sub-high efficiency filters usually has good chemical stability and can resist chemical pollutants in the air, such as organic gases, steam, etc.