Weier manufactures industrial-grade air filters for HVAC systems, AHU units, cleanrooms, pharmaceutical facilities, and industrial plants. We offer panel filters, bag filters, compact filters, roll media, and fully custom OEM air filter solutions — with in-house filter media production, certified efficiency ratings (G3–H14 / MERV 8–16), and engineer-to-order capabilities built for demanding B2B procurement specifications.
High-dust-holding bag filters (F5–F9 / MERV 8–14) for large commercial HVAC and industrial AHU systems. Available in 4, 6, and 8-pocket configurations.
Rigid-frame compact filters (F7–H14) with precision flanges for secure, leak-free AHU and cleanroom installation. Suited for pharma and industrial systems.
Space-efficient HEPA-grade compact filters (H13–H14) delivering high airflow performance in confined HVAC and AHU spaces. Ideal for cleanroom and pharma applications.
Cost-effective panel filters (G3–F9 / MERV 4–16) for commercial HVAC and industrial AHU pre-filtration. Available in standard and custom sizes with bulk OEM supply options.
Custom-cut synthetic roll media for OEM integration, high-volume replacement, and private-label supply. Compatible with major HVAC and AHU filter frame systems.
Engineer-to-order filters (G3–H14) built to your exact dimensions, efficiency class, and environmental performance requirements. Ideal for OEM and system integrators.
Every Weier filter ships with full compliance certification, giving HVAC contractors and facility managers the project documentation they need — without chasing paperwork.
We manufacture our own filter media on-site, giving you tighter batch consistency and faster turnaround — no third-party material delays, no quality surprises.
Unusual dimensions, specific MERV ratings, or media suited to harsh industrial conditions — our engineering team works directly from your specs to deliver a filter built precisely for your application.
Our annual production capacity ensures reliable fulfillment for large-volume wholesale orders, scheduled procurement contracts, and OEM/ODM programs — even as your demand scales.
Weier serves international procurement teams across 80+ markets with established export documentation, compliant packaging, and reliable logistics — so your order arrives on schedule, every time.
When you partner with WAir, you're not just selecting a manufacturer—you're choosing a specialized "Little Giant" enterprise committed to guarding breath with technology.
Weier is a vertically integrated air filter manufacturer with full in-house control over media production, engineering, and quality assurance — serving HVAC, cleanroom, pharma, and industrial clients across 80+ countries.
We operate as a direct manufacturing partner, not a trading company. Certified products, flexible MOQs, and a dedicated R&D team make Weier the preferred supply source for contractors, facility managers, and global distributors.
"Weier's filters consistently meet our project specification requirements for MERV and ISO 16890 compliance. The quality documentation they provide has made vendor approval on commercial building projects significantly faster and more straightforward."
Mechanical Contractor, Netherlands
"We manage filter replacement schedules across a portfolio of 12 commercial properties. Weier has never missed a delivery window in three years of supply. That level of consistency is exactly what large-scale facility management requires."
Property Management Group, United Kingdom
"Our cleanroom pre-filtration setup required non-standard dimensions and a specific fiber release specification. Weier's engineering team turned around a compliant custom solution within two weeks. No other supplier we contacted could match that response."
Electronics Manufacturing Plant, Germany
Below are some frequently asked questions regarding air filter wholesale and service, if you can't find what you're looking for, please just contact us.
Weier produces a comprehensive range of general ventilation filters including bag filters, compact filters with flange, box-style compact filters, panel filters, roll media, and fully custom-engineered solutions for HVAC, AHU, cleanroom, and industrial applications.
Our filters are tested and certified to MERV (ASHRAE 52.2), ISO 16890, and EN779 standards. We provide full test documentation and compliance certificates with every order — essential for HVAC contractor submittals and facility compliance audits.
Yes. Custom sizing, efficiency ratings, media types, and frame configurations are a core part of our manufacturing capability. Our 15 R&D engineers work directly with your technical requirements to produce a compliant, production-ready solution.
Our facility produces over 500,000 filters annually. Standard lead times vary by product type and order volume. In-house media production gives us greater schedule control, allowing us to offer faster turnaround compared to suppliers dependent on external material sourcing.
Yes. Weier supports OEM and ODM programs for distributors and wholesalers, including private label packaging, custom branding, and dedicated supply arrangements. Contact us to discuss minimum order quantities and program terms.
Weier currently supplies clients in over 80 countries across Europe, North America, Asia, and beyond. We manage export documentation, compliance packaging, and freight coordination — ensuring smooth customs clearance and on-time delivery for international buyers.
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