Products & Services

Custom Filters

8Products

Pre-Filters(8)Medium Filters(5)HEPA / ULPA Filters(6)Activated Carbon Chemical Filters(9)Heat-Resistant Filters(7)Filtration Equipment(3)Custom Filters(8)Cleanroom Equipment(15)Professional Services(2)NIPPON MUKI(34)Metal Fabrication(1)

CUSTOM FILTER

Custom Filters: Size, Frame, Media, Function — All Four Dimensions Customizable

Standard parts don't cover it, legacy equipment has no OEM, imports take 6 months — we build to match.

One filter = media + frame

Five Parts of a Filter

What looks like a single unit is five components. Every one of them can be customized.

Media

Sets filtration efficiency and particle-size range

Frame

Sets size, temperature limit, chemical resistance

Separator

Holds pleat spacing, ensures airflow uniformity

Sealant

Airtight bond between media and frame

Gasket / handle / latch

Installation and replacement hardware

1. Dimension: any L × W × D

No standard-size constraint. Give us L/W/D and we build it — typical tolerance within ±1 mm.

Smallest

100 × 100 × 25 mm

Small equipment / instrument built-in

Standard FFU

610 × 610 × 292 mm

Ceiling FFU for cleanrooms

Large AHU

915 × 2440 × 350 mm

Make-up air unit

Non-square

Round, trapezoid, irregular

Legacy equipment, special projects

2. Frame Material: four mainstream + special

The frame dictates what environment the filter can live in. Wrong frame ruins even the best media.

Material	Temperature	Corrosion	Fire rating	Life	Use case
Cardboard	≤ 80 °C	Poor	Poor	Short	Low cost, disposable, clean environments
Aluminum	≤ 120 °C	Medium	Non-flammable	Medium	Standard HEPA, office cleanrooms
Galvanized steel	≤ 400 °C	Medium	Non-flammable	Medium-long	Mid-temp, cost-sensitive
Stainless 304 / 316	≤ 800 °C	Excellent	Non-flammable	Long	High-temp, humid, chemical
PP plastic	≤ 80 °C	Excellent (acid/alkali)	V-0 flame-retardant	Medium	Chemical plants, pharma acid wash

3. Media Grade: G1 to U17, full ladder

Media determines the smallest particle you can catch. From G1 stopping pollen to U17 catching 0.1 μm molecules — every step is customizable.

G1 – G4

Coarse / primary

Construction dust, pre-filter for coarse loads

M5 – M6

Medium (ePM10)

Office HVAC, general ventilation

F7 – F9

High-medium (ePM2.5 / ePM1)

Pre-HEPA, hospitals, schools

H13 – H14

HEPA (99.95 – 99.995%)

General cleanrooms, aseptic pharma

U15 – U17

ULPA (99.9995 – 99.999995%)

Semi lithography, EUV

4. Functional Add-ons: more than filtration

Same HEPA can unlock added functions with different coatings or specialty media.

🧪

Chemical filter (odor, AMC)

H₃PO₄ / KOH / KMnO₄-impregnated activated carbon for acids, bases, VOCs

🔥

High-temperature

Heat-resistant glass or ceramic fiber, continuous 250–600 °C

🦠

Antimicrobial coating

Nano-silver / copper-ion surface adds pathogen suppression

💧

Hydrophobic (PTFE membrane)

Super-hydrophobic surface, clog-resistant in humid environments

⚡

Static dissipation

Conductive frame + ground strap to prevent ESD damage

🎯

Low-pressure-drop design

CFD-optimized pleating, 10–20% lower ΔP at same efficiency

5. Common Custom Scenarios

Not every need fits standard parts. In these situations, custom is the only answer.

🏭

Legacy equipment

30-year-old equipment, OEM long gone. Send us the old filter, we reverse-engineer the spec.

🌏

Overseas brand replacement

Imported brand has 3–6 month lead time at 2–3× price. Give us CAD or original — 2-week turnaround.

⚙️

Non-standard equipment

In-house AHU, lab equipment, instrumentation needing specific filter.

🧬

Special processes

Advanced semi nodes, BSL-3/4, nuclear facilities, pharma GMP special requirements.

📦

Space-constrained

Existing plant-room space won't take standard sizes. Filter fits the space, not vice versa.

♻️

Performance upgrade

Old equipment on F7 wants H13 — we build new media to the original housing interface.

6. Customization Workflow — Five Steps

Typical cycle: 2–4 weeks from requirements to stable supply (complex builds 6–8 weeks).

Requirements

Submit the original unit, CAD, or describe the application (airflow, efficiency, environment)

›

Design + quote

Engineering recommends media + frame combination, drafts design, issues quote

›

Prototype

1–2 week to fabricate 1–2 sample units, measured for airflow / ΔP / efficiency

›

Customer verify

Sample trial-fit, field test, feedback loop

›

Production

Spec locked, enter steady supply, each batch ships with QC test report

Got a custom requirement? Let's talk

Bring the original part, a CAD drawing, or just a rough idea — we can start from anywhere.

Air Purifier True HEPA Filter Cartridge

Anti-allergen / Antibacterial / Deodorizing Filter (Made in Japan)

Automotive Air Filter (Cabin Filter)

Formaldehyde Removal Filter (Honeycomb Type, Customizable) / TOTO Washlet Deodorizer Block

Lysozyme Filter / Bactericidal Enzyme Filter (Made in Japan)

Projector Dust Filter

PTFE (Teflon) HEPA, ULPA

Antibacterial Filter (Purafil Fiber Sterilization Technology)

Frequently Asked Questions

What is the minimum order quantity for custom filters?

It depends on specifications and frame material. Standard size changes (same frame and media) typically have no minimum order quantity. Special sizes, special frame materials, or special media are recommended at a minimum of 10 pieces to amortize tooling costs. For urgent needs, please inquire about the possibility of resizing from stock.

What is the lead time for custom filters?

General custom filter lead time is 2–4 weeks depending on complexity and specifications. Orders requiring imported special media take approximately 4–6 weeks. For bulk orders or rush items, early production scheduling is possible — inquiring and ordering 1 month in advance is recommended to secure the delivery date.

What information is needed to place a custom order?

Please provide: 1) Full dimensions (W×H×D including frame), 2) Efficiency grade or media specification, 3) Frame material and sealing type, 4) Rated airflow, 5) Installation method and on-site duct drawings, 6) Operating environment (temperature, humidity, chemical exposure), 7) Required quantity.

Do custom filters include test reports?

Standard custom HEPA/ULPA filters include individual DOP/PAO scan test reports. Medium-efficiency filters can include factory inspection reports or third-party certification upon request. Additional testing (MPPS scan, particle count, outgassing test) can be arranged as agreed.

Customization

Need Custom Filters?

Special sizes, specific efficiencies, special materials — we can customize to your exact requirements. Contact us for a quote.

Inquire About Custom Filters +886-2-25981958