1.High-efficiency filter for fresh air systems, featuring an H13 HEPA layer and a thick activated carbon layer, suitable for ducted fresh air systems. It can filter outdoor smog, pollen, and vehicle exhaust particles, while adsorbing formaldehyde and TVOC. The filter is wrapped with a sealed sponge around the edges to perfectly fit the fresh air unit and prevent unfiltered outdoor air from seeping in. With 120 layers of folding, it has a large filtration area and low air resistance, ensuring the fresh air flow is not affected and providing the entire house with continuous clean fresh air, making it a safer alternative to opening windows for ventilation.

2. Washable long-lasting filter. The pre-filter is made of electrostatic cotton material and can be washed over 50 times. The HEPA layer is made of PTFE-coated material, which is waterproof and oil-resistant, and the filtration efficiency does not decline after cleaning. The activated carbon layer is detachable for cost-effective replacement. It is suitable for household economy air purifiers and has an overall lifespan of up to 1 year, significantly reducing replacement costs. It is environmentally friendly and cost-effective, making it a good choice for families seeking high value for money.

3.Specialized dehumidifying filter for basements, with a HEPA layer containing anti-mold agents to inhibit mold growth inside the filter and an activated carbon layer mixed with dehumidifying factors to absorb moisture in the air while filtering. The filter frame is made of moisture-resistant ABS material, which is not prone to deformation or cracking. It is compatible with basement-specific air purifiers, has a large filtration area and low air resistance, and can continuously reduce basement humidity, solving the problems of dampness and mold, creating a dry and clean storage space.

4.Universal filter for homestays, compatible with 80% of household air purifiers on the market without the need for precise brand matching. The HEPA layer filters haze and pollen, and the activated carbon layer removes mold and cigarette odor residues in homestays. The filter is easy to install and can be quickly replaced by homestay cleaners. It offers high cost performance and greater discounts for bulk purchases, helping homestays quickly improve room air quality and providing guests with a clean and fresh stay experience.