Import Air Filter — Buy in Bulk from Supplier in China

This air filter is designed for HVAC systems, air purifiers, and general ventilation applications, with a stated HEPA rating capturing 99.97 percent of particles at 0.3 micrometres. The filter employs a multi-layer composite media with a low-pressure drop architecture intended to maintain airflow while reducing energy consumption. Beijing Hengsheng Tongda Stainless Steel Co., Ltd. is based in Beiliu Industrial Area, Tongzhou Town, Beijing, with a supplier tier of imported and a harbor trust classification. Response metrics show zero percent response rate and zero average response hours, so direct outreach reliability is unverified.

The media construction typically comprises a pre-filter layer of synthetic fibre mat, a HEPA-grade microfibre glass paper or meltblown synthetic layer, and a support scrim to maintain pleat geometry under rated airflow. Frame materials for this product category range from moisture-resistant cardboard to galvanised steel or ABS plastic, depending on the intended duty and humidity exposure. The 0.3-micron DOP or MPPS efficiency rating is the standard HEPA benchmark, but the source does notged whether testing was conducted per EN 1822, ISO 29463, or ASME AG-1. Pressure drop at rated airflow, which determines fan energy demand, is not quantified in the listing.

Residential, commercial, and industrial buyers integrate this filter into central air handling units, standalone purifiers, and building management systems where particulate reduction supports occupant health or process cleanliness. The low-pressure drop claim is relevant for continuous-run applications where energy cost accumulates. Sourcing specifics such as MOQ, lead time, Incoterms, and unit pricing are not provided in the source and must be negotiated directly with Beijing Hengsheng Tongda Stainless Steel Co., Ltd. Buyers should request full EN 1822 or ISO 29463 test reports, including initial pressure drop and loading dust capacity, before bulk commitment.

Beijing Hengsheng Tongda Stainless Steel Co., Ltd. operates from Beiliu Industrial Area, Tongzhou Town, Beijing 101118, China. The company's name indicates a specialisation in stainless steel, yet this listing presents an air filter product, suggesting either diversification into fabricated filter housings and frames or trading activity. The supplier tier is imported, and the trust tier is harbor, with no response rate or response time data available. This lack of engagement history means buyers cannot rely on platform-mediated communication metrics and must conduct independent verification.

The listing provides no information about factory floor area, employee count, year of establishment, annual revenue, or named clients, and none should be invented. What can be inferred is that a Beijing location offers proximity to domestic HVAC and construction markets, though not to major export ports, which affects logistics planning. Buyers should clarify whether production is in-house or outsourced, given the stainless steel company name and the air filter product offering. Verification of ISO 9001, ISO 14001, and CE marking claims is essential, as the source description mentions these without supporting documentation. Direct factory audit or third-party inspection is advisable given the absence of platform response signals.