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The Ranveth washable primary efficiency filter is a reusable air filter built around a high-throughput PET media and a corrosion-resistant aluminum frame, rated G3, G4 or M5. It captures coarse dust, hair, fibers and insects in HVAC and ventilation systems, protecting downstream coils and higher-efficiency filters. It suits facility managers, HVAC contractors and OEM buyers who want a serviceable pre-filter for high-airflow or high-humidity installations.
The filter pairs a durable PET (polyester) media with a rigid aluminum frame. This combination is chosen for repeated washing and low resistance at the rated face velocity of 2.5 m/s. The PET media is selected for its toughness and water resistance, so it can be rinsed and reused without breaking down. The aluminum frame keeps the filter square and sealed against air bypass, even under the pressure swings of a large air-handling unit.
The layer build is a single-stage media pack held in the frame. There is no separate pre-layer or support grid beyond what is needed to maintain pleat spacing and media integrity. This simple construction contributes to the low initial resistance and predictable loading behavior that make the filter suitable as a pre-filter in demanding environments.
Because the media and frame are designed as a system, the filter delivers a balance of efficiency, airflow and service life. The PET media provides the dust-holding capacity needed for G3–M5 duties, while the aluminum frame ensures the media stays in place during cleaning and operation. This pairing is what allows the filter to be washed multiple times and returned to service with consistent performance.
| Item | Detail |
|---|---|
| Product name | Washable Primary/Medium Filter |
| Efficiency | G3 / G4 / M5 |
| Media | High-throughput, abrasion-resistant PET (polyester) filter mesh |
| Frame | Corrosion-resistant aluminum frame |
| Rated operating face velocity | 2.5 m/s |
| Core applications | Industrial HVAC systems, high-humidity exhaust environments, heavy-dust workshop pre-filtration, central air intake of commercial buildings |
| Standard sizes (W × H × D) | 12×24×2 inch (289 × 594 × 46 mm); 16×20×2 inch (390 × 492 × 46 mm); 20×20×2 inch (492 × 492 × 46 mm); 20×24×2 inch (492 × 594 × 46 mm); 24×24×2 inch (594 × 594 × 46 mm) |
| Customisation (OEM/ODM) | 50,000 m² plant and CNAS-accredited laboratory; ISO/IATF16949 certified; custom sizes, thicknesses and efficiencies available |
This filter is typically specified as a pre-filter in commercial air-handling units, fresh-air systems and cleanroom front stages. Its high-humidity tolerance makes it a fit for exhaust air in food processing, pharmaceutical and general manufacturing plants. In heavy-dust workshops, it captures the bulk of airborne particles before they reach finer filters. It is also used in data centers and semiconductor facilities, where reliable pre-filtration supports stable airflow and protects more sensitive downstream stages.
To specify a filter that fits your system, please send the following details:
With these inputs, our team can recommend the appropriate media grade and frame configuration.
Ranveth is backed by a manufacturer with a CNAS-accredited laboratory, so media choices are supported by test data for efficiency, dust-holding capacity and resistance. The production base covers 50,000 m², including six cleanrooms totalling 20,000 m², and operates under IATF 16949 (achieved in 2024) and ISO 9001, ISO 14001 and ISO 45001 systems. Products comply with REACH and RoHS requirements, and we have exported to Europe, the US, Japan and Korea for over 20 years. With more than 1,000 filter solutions developed, we can support OEM/ODM projects from concept to delivery.
We welcome the opportunity to discuss your filtration requirements. For samples, pricing or technical consultation, please contact our team with the details listed above. We will respond with a tailored proposal, including lead time and MOQ, based on your specifications.
The filter uses a high-throughput, abrasion-resistant PET (polyester) media held in a corrosion-resistant aluminum frame. This pairing allows repeated washing and low resistance at the rated face velocity of 2.5 m/s. The media is selected for toughness and water resistance, while the frame maintains structural integrity.
It is available in G3, G4 and M5 efficiency grades, corresponding to EN 779 and ISO 16890 classifications. These grades are suited to pre-filtration duties, capturing coarse dust and protecting downstream filters. The exact grade can be selected based on your particle-size targets and system design.
Yes, we support OEM/ODM customisation of size, thickness, efficiency grade, frame material and branding. Simply provide your required dimensions or a drawing, and we can produce a filter to match. Our engineering team can also advise on media selection for your operating conditions.
Under normal conditions, the filter can be washed 5–8 times. Each wash cycle typically corresponds to a service interval of 2–3 months, giving a total life of 12–18 months depending on dust load and maintenance practices. We recommend cleaning when the pressure drop reaches twice the initial value.
For standard sizes, the MOQ is typically 500–1,000 pieces. Custom specifications can be negotiated based on project requirements. Please contact us with your estimated quantities so we can confirm the most economical order size.
Sample lead time is generally 5–7 working days for standard sizes; custom samples may take longer. Bulk orders are typically delivered 20–30 days after order confirmation. Our automated production lines support high monthly output to meet large or urgent requirements.
Yes, our CNAS-accredited laboratory can provide test reports for efficiency, dust-holding capacity and resistance. These reports are generated in-house and support the media and frame choices we recommend. They are available upon request with your order.
Clean the filter when the pressure drop reaches approximately 250 Pa or twice the initial resistance. Rinse with water (≤40°C) from the clean side, avoiding high-pressure jets, and allow it to dry completely before reinstallation. Following these steps helps maintain efficiency and extend service life. For further guidance, please contact our team.
