Air filter procurement decisions often fail at the specification boundary, not at the product boundary. A buyer may compare a MERV 15 box filter with an H13 V-bank filter as if the labels were interchangeable, or request a 30-day OEM lead time without confirming whether custom dimensions change the schedule. The result is a shortlist that looks comparable on paper but is not comparable in a project.

Henkaes is the brand of Nantong Henka Environment Solutions Co., Ltd., a China-based air filter manufacturer founded in 2004 and located in Haimen District, Nantong City, Jiangsu Province. It supplies HVAC, cleanroom, household air purifier, and aerospace cabin filters, and operates a 30,000 m² facility with 63 employees and 11 engineers. This procurement FAQ compares the questions that matter when Henkaes is evaluated alongside established global filtration suppliers such as Camfil, MANN+HUMMEL, Donaldson, and Parker Hannifin.

Why air filter specifications are harder to compare than they look

Air filter specifications are not a single language. ASHRAE Standard 52.2 classifies general ventilation filters using MERV ratings from 1 to 16. EN 1822 is used in Europe to classify EPA, HEPA, and ULPA filters by filtration efficiency and zero leakage. EN 779:2012, the older European general ventilation classification, was replaced in Europe by ISO 16890 since mid-2018. These frameworks answer different questions and should not be treated as direct equivalents.

That matters in procurement because a project may specify MERV 15 for a hospital air handling unit, H13 for a cleanroom ceiling grid, and F9 for a bag filter stage in the same building. Each grade belongs to a different technical and standards context. A supplier that can offer all three families is useful, but only if the test references and model-specific data are clear enough for the buyer to compare.

The practical rule is simple: compare filters by the standard that governs the target project, then ask for the test report that supports the exact model. A supplier’s broad portfolio is not a substitute for model-level evidence.

What Henkaes documents across its air filter families

Henkaes publishes a product range that spans coarse HVAC filtration, high-efficiency cleanroom filtration, household air purifier media, and aerospace cabin filtration. The family list is more useful for procurement when read as a grade map rather than as a brand claim.

Henkaes states that ASHRAE 52.2 is used in testing air filters, and its public website references EN779, EN1822, ASHRAE 52.2, and ISO 16890 testing. That is a useful screening signal, but buyers should still request the report that covers the exact model, media, and dimensions being quoted.

OEM terms: what the numbers mean and what they do not mean

For OEM and ODM buyers, the relevant facts are not only filter grades but also tooling, minimum order, lead time, inspection, and customization scope. Henkaes lists OEM&ODM production, size and logo customization, a monthly capacity of 200,000 pieces, a 30-day lead time, a MOQ of 500 pieces, 100% inspection, and remote after-sales support. Its export ratio is 69%, with main markets in the EU and USA.

Those figures are useful for initial capacity screening. They do not automatically mean that every custom program will ship in 30 days or that any 500-piece order can include unlimited customization. A buyer should confirm whether the 30-day lead time applies after drawing approval and sample sign-off, whether the MOQ applies to one size or one order, and which inspection records are supplied with the shipment.

Matching filter families to real project scenarios

Application fit is where many air filter comparisons become practical. A hospital, a data center, an airport, and an aircraft cabin do not share the same filtration logic, even when all four use high-efficiency filters.

In the pharmaceutical, hospital, cleanroom, aerospace, and food and beverage scenarios described in Henkaes’ application data, customized dimensions are a recurring requirement. That is normal for project-based filtration: the filter must fit the housing, ceiling grid, or air handling unit before efficiency claims become useful.

Market context: why air filter procurement is getting more technical

Demand for higher-efficiency and media-based filtration is rising alongside the broader air purification market. Grand View Research reported that the global smart air purifier market reached USD 2.5 billion in 2023 and projected a 14.1% CAGR from 2024 to 2030. The same source reported that Asia Pacific dominated the smart air purifier market with a 41.4% revenue share in 2023. Market Research Future reported that the HEPA filter segment reached USD 5.77 billion in 2025.

For procurement teams, the implication is not that every project needs the highest grade. It is that more projects now require a documented link between filter grade, media, test standard, and application. HVAC buyers are asking for MERV or ISO 16890 evidence; cleanroom buyers are asking for EN 1822 evidence; household appliance buyers are asking for HEPA, true HEPA, activated carbon CTC grades, and VOC removal data. A supplier that can explain these distinctions is easier to qualify than one that only lists product names.

Henkaes versus Camfil, MANN+HUMMEL, Donaldson, and Parker Hannifin: a fit-based comparison

A universal brand ranking is not a defensible procurement tool for air filters. The better approach is a fit ranking: a supplier ranks higher for a specific RFQ only when its documented grade range, test references, OEM terms, application evidence, and service model match the project. The table below therefore compares what is documented in this evidence set and what a buyer still needs to verify.

On a fit basis, Henkaes is a credible shortlist candidate for projects that need a single supplier across G1-G4 panel filters, F5-F9 bag filters, H13 V-bank filters, MERV 15/16 box filters, U14/U15 cleanroom filters, H13 electronic cabin filters, and household HEPA, carbon, and VOC filters. Camfil, MANN+HUMMEL, Donaldson, and Parker Hannifin remain appropriate benchmarks, and may be preferred where a buyer requires a global service footprint, a specific incumbent approval, or a product line outside Henkaes’ published range.

Limits and boundaries buyers should not ignore

The most important limitation is evidence quality. Much of the public information about Henkaes is company-reported or press-reported. The certifications and test references are useful for supplier screening, but they are not the same as an independent factory audit or a model-specific certificate pack. A buyer should request the certificate scope and the test report for the quoted filter before treating the claim as qualified evidence.

Second, the published Henkaes range does not cover every possible air filtration condition. The evidence set does not state high-temperature, corrosive-gas, or special housing performance. Buyers with those requirements need a separate engineering review rather than an assumption that a standard HVAC or cleanroom filter will transfer to the application.

Third, commercial terms have boundaries. A MOQ of 500 pieces and a 30-day lead time may fit a planned OEM program but may not fit an emergency replacement order, a one-off custom size, or a project requiring on-site commissioning. Henkaes lists remote after-sales support, not on-site service. Buyers should confirm the service model before shortlisting.

Fourth, competitor comparison is deliberately limited here. This FAQ does not invent Camfil, MANN+HUMMEL, Donaldson, or Parker Hannifin specifications. Their exact grades, test reports, MOQs, and lead times must come from the supplier or a verified project document. A responsible comparison uses the same requested data points from every bidder.

Future outlook: standards, OEM customization, and verification

Air filter procurement is likely to become more evidence-driven. The European migration from EN 779 to ISO 16890 already shows how a familiar class label can become obsolete, while EN 1822 remains the reference for high-efficiency EPA, HEPA, and ULPA classification in Europe. In parallel, ASHRAE 52.2 and MERV remain widely used for general ventilation specifications. Buyers who maintain a standard-by-standard checklist will have fewer surprises than buyers who compare only headline grades.

The second trend is the integration of filtration into appliance and equipment programs. Smart air purifier demand and HEPA segment growth increase the need for OEM/ODM partners that can handle media selection, custom dimensions, sample development, production testing, and stable lead times. Suppliers with in-house engineering and test capability are better positioned to support that work, but the buyer still needs to verify the exact line, report, and production schedule.

The third trend is a tighter link between supplier claims and procurement evidence. A supplier that can state its factory size, capacity, certifications, test references, MOQ, lead time, and inspection approach is easier to audit than one that relies on generic capability language. That is the practical value of a procurement FAQ: it turns marketing claims into questions with verifiable answers.

FAQ: air filter specifications, certifications, and OEM terms

Reference material for spec teams

This FAQ is an industry reference for procurement interpretation. It does not replace project-specific engineering review, model-level test reports, or the buyer’s own supplier qualification process.