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Industrial Safety Equipment & PPE — ANSI/OSHA Compliant
Industrial Safety Equipment & PPE — ANSI/OSHA Compliant
May 14, 2026 Updated July 17, 2026 Steven Eaton

Moldex 4700N100 AirWave Review — N100 Filtration in a Disposable Cup

WC Safety Editorial Verdict: 4.3/5

WC Safety Editorial Verdict — 4.3/5. The Moldex 4700 N100 AirWave earns its score by packaging the maximum NIOSH particulate class — ≥99.97% efficiency against non-oil aerosols — into a maintenance-free disposable cup, with the AirWave breathing surface and Ventex valve making sustained N100-class wear genuinely tolerable. It is the right tool when you need HEPA-equivalent filtration against asbestos, lead, or non-oil toxic dusts but cannot justify the cleaning, storage, and cartridge-tracking burden of a reusable elastomeric like the Honeywell North 75FFP100.

We hold it at 4.3 rather than higher because it is single-shift disposable (no cleaning, no reuse across hazardous shifts), N-rated only (useless in oil mist), and still tops out at APF 10 like any half-mask — so for the cost-per-shift, anyone in a recurring N100 program should price it against a P100 elastomeric. See our respiratory protection complete guide before committing a crew to it.

Moldex 4700 N100 AirWave Review: HEPA-Equivalent 99.97% Filtration in a Disposable Cup Respirator for Asbestos, Lead, and TB Environments

N100 is the highest particulate filter efficiency class defined by NIOSH under 42 CFR Part 84: ≥99.97% against the most penetrating particle size (approximately 0.3 microns), tested with non-oil aerosols. At 99.97% efficiency, N100 is the functional equivalent of a HEPA filter — the same standard used in hospital room air filtration systems and cleanroom HVAC. The Moldex 4700 delivers this filtration class in a disposable format — no maintenance, no cleaning, no cartridge storage between uses, no gasket inspection. When the shift ends, the respirator is discarded.

The N100 designation applies to the N-class (non-oil-resistant) rating. The 4700 N100 is not rated for oil-containing aerosols — for HEPA-equivalent filtration in oil environments, a P100 elastomeric or supplied-air respirator is required. In non-oil environments where 99.97% efficiency is required — asbestos fiber, lead dust, beryllium dust, non-oil toxic metal dusts, TB aerosols — the 4700 N100 provides maximum disposable particulate protection with APF 10 as a tight-fitting half-mask.

AT A GLANCE

NIOSH Rating N100 — ≥99.97% non-oil particulate
APF 10 (tight-fitting half-mask)
Max Use Concentration 10× PEL
Exhalation Valve Ventex — NOT source-control eligible
Shell Design AirWave domed breathing chamber
Headband SmartStrap adjustable clip
Oil Class N — not oil-resistant
Regulation NIOSH 42 CFR Part 84 | OSHA 29 CFR 1910.134

NIOSH Filter Class Comparison Table

Class Efficiency Oil Resistance Typical Use
N95 ≥95% No General dust, welding, healthcare
N99 ≥99% No TB, fine silica, pharmaceutical APIs
N100 ≥99.97% No Asbestos, lead, beryllium, TB isolation
R95 ≥95% 1 shift Metalworking coolant mist
P100 ≥99.97% Multi-shift Asbestos, pesticide spraying, heavy oil mist

When N100 Is Required Over N95 and N99

N100 filtration is appropriate when the hazard assessment identifies particulate hazards so acutely toxic that the small fractional penetration of N95 or N99 creates unacceptable residual risk, or where regulatory standards specifically mandate N100 or P100 class filtration. Key applications include:

Asbestos: EPA and OSHA asbestos standards (29 CFR 1910.1001 for general industry; 1926.1101 for construction) require respirators providing at least APF 10 at the N100/P100 level for certain operations. For operations exceeding 10× PEL, a full-face elastomeric with P100 or PAPR with HEPA is required. The 4700 N100 at APF 10 satisfies the lowest-tier respirator requirement where concentrations do not exceed 10× PEL.

Lead abatement: OSHA's lead standards (1910.1025, 1926.62) require specific respirator types based on airborne lead concentration relative to PEL (50 µg/m³). For concentrations up to 500 µg/m³ (10× PEL), a half-mask respirator with N100 or P100 filters is required. The Moldex 4700 N100 satisfies this requirement for the 10× PEL tier.

Beryllium: OSHA's beryllium standard (1910.1024, 1926.1124) requires P100 filtering efficiency for beryllium-containing dust and fume. N100 and P100 share the 99.97% efficiency threshold — N100 is appropriate for beryllium operations in non-oil environments.

TB isolation rooms: CDC guidance recommends N95 or higher for healthcare workers entering airborne infection isolation rooms. For facilities choosing to exceed the N95 minimum for higher-risk patient scenarios (multi-drug resistant TB, post-aerosol-generating procedures), N100 provides maximum disposable filtration without a reusable elastomeric platform.

Toxic metal dust (cadmium, chromate, arsenic): OSHA specific substance standards for cadmium (1910.1027), chromium VI (1910.1026), and arsenic (1910.1018) specify respirator requirements based on exposure concentration. The 4700 N100 at APF 10 covers the relevant concentration tiers for these substances in the half-mask range.

Ventex Valve in N100 Disposable Programs

N100 filter media carries higher breathing resistance than N95 or N99 — achieving 99.97% efficiency requires denser fiber packing and more extensive electrostatic treatment in the filter matrix. The Ventex exhalation valve on the Moldex 4700 is not optional for extended-shift compliance — it is a practical necessity. Without the valve, exhalation through N100 media would create significant resistance that would make all-day wear uncomfortable and drive respirator removal in the hazard zone.

The Ventex valve makes the 4700 N100 suitable for tasks requiring extended wear: asbestos abatement walkthrough inspections, lead abatement surface preparation, pharmaceutical API handling, or any application where N100 protection is needed for periods longer than brief task entries. The valve tradeoff is source control disqualification — the 4700 is not appropriate for settings where the wearer's exhaled aerosols must be filtered. For N100-equivalent filtration with source control, a full-face elastomeric or PAPR is required (no major manufacturer offers an unvalved N100 disposable for extended wear due to the practical resistance limitations).

For source-control eligible N95 in the AirWave platform, see the Moldex 4600 N95 (unvalved, FDA surgical-cleared).

AirWave Platform and SmartStrap in High-Hazard Environments

The AirWave domed shell creates a breathing chamber that is particularly valuable with N100 filter media. The large dome volume provides a reservoir of air immediately inside the facepiece, buffering inhalation peaks and making the higher resistance of N100 media less perceptible during normal breathing. Moldex's SpiroTek filter technology — a graduated-density electrostatic fiber matrix — is optimized for both efficiency and resistance, achieving N100 certification with lower resistance than some competing N100 disposables.

The SmartStrap adjustable headband allows workers to achieve consistent tension across varied head sizes — important in programs where multiple workers use the same respirator model and individual tension control affects seal quality and comfort. Properly tensioned headbands reduce seal leakage without the over-tightening that causes discomfort and encourages removal.

The Small-Size Variant: 4701 N100

Workers who fail quantitative fit testing on the standard-size 4700 N100 have the Moldex 4701 N100 as the next step — the Small-size variant of the same AirWave platform with identical N100 filtration, SmartStrap, and Ventex valve. Size selection must be determined by fit testing, not self-assessment. For programs serving mixed-gender workforces or populations where smaller facial dimensions are common, stocking both the 4700 and the 4701 ensures fit test options across the full population. See the Moldex 4701 N100 review for the Small-size variant comparison.

Regulatory Compliance for N100 Programs

Under OSHA 29 CFR 1910.134, N100 class respirators carry APF 10 as tight-fitting half-masks — the same APF as N95. For concentrations above 10× PEL of any of the hazardous substances mentioned above, a higher APF respirator is required (full-face elastomeric at APF 50, or PAPR/supplied-air at APF 25–1000 depending on configuration). Asbestos operations in particular often require higher APF than a half-mask N100 can provide for class III or class II work — verify specific regulatory requirements for the operation classification before specifying any half-mask respirator for asbestos.

NIOSH certifies the 4700 N100 under TC-84A series. The NIOSH TC number printed on the respirator and packaging verifies authenticity and approval status. For the full regulatory framework, see our NIOSH respirator standards guide and the full respirators collection. For reusable N100/P100 options with higher APF, see our full-face respirators.

Find the Moldex 4700 N100 on Amazon Check Price on Amazon → and through the WC Safety disposable respirators collection.

Frequently Asked Questions — Moldex 4700 N100

Q: What does N100 mean on a NIOSH respirator?

A: N100 is the highest particulate efficiency class for non-oil aerosols: ≥99.97% filtration efficiency against the most penetrating particle size. It is the functional equivalent of a HEPA filter. The N designation means the filter is not rated for oil-containing aerosols.

Q: Is N100 the same as HEPA?

A: Effectively yes — both N100 and HEPA certify ≥99.97% efficiency at the most penetrating particle size. HEPA is an air filtration standard; N100 is NIOSH's designation for respirator filter media meeting the same efficiency threshold in a non-oil environment.

Q: Does the Moldex 4700 N100 have a higher APF than an N95?

A: No. All tight-fitting filtering facepiece half-masks carry APF 10 under OSHA 1910.134, regardless of filter class. The N100 rating provides higher filtration efficiency within the same APF-10 protection factor envelope — more filtration margin, not higher APF.

Q: Can the Moldex 4700 be used for asbestos abatement?

A: For asbestos concentrations at or below 10× PEL with a half-mask, yes — N100 meets the filter class requirement. However, many asbestos operations require higher APF than APF-10 provides. Verify the specific regulatory requirements for the operation class (Class I, II, III, IV under OSHA 1926.1101) before specifying any half-mask respirator.

Q: Is the Moldex 4700 N100 appropriate for lead abatement?

A: For airborne lead concentrations between 50 µg/m³ (PEL) and 500 µg/m³ (10× PEL), OSHA 1910.1025 requires a half-mask with N100 or P100 filters. The 4700 N100 meets this requirement for the 10× PEL tier in non-oil environments.

Q: Does the Moldex 4700 have an exhalation valve?

A: Yes — Ventex valve. This makes extended-shift wear with N100 media practical by reducing exhalation resistance and cup heat. It disqualifies the 4700 from source-control settings where exhaled air must be filtered.

Q: What is the difference between N100 and P100?

A: Both certify ≥99.97% efficiency. N100 is not oil-resistant (for non-oil environments only). P100 is oil-proof and rated for multi-shift use in oil-containing aerosol environments. In non-oil environments, both provide equivalent filtration. For oil environments, P100 is required.

Q: Is the 4700 N100 appropriate for TB isolation rooms?

A: Yes — N100 exceeds CDC's N95 minimum recommendation for healthcare workers entering TB isolation rooms. The Ventex valve does not disqualify it for this use (the healthcare worker is the wearer, not the patient), but check facility-specific infection control policies.

Q: Does the Moldex 4700 N100 require fit testing?

A: Yes. All tight-fitting respirators require annual fit testing per OSHA 1910.134(f). The 4700 N100 is a tight-fitting half-mask and must be fit tested with the specific employee who will wear it.

Q: Can I use the Moldex 4700 N100 if I already have a fit test on the 4600 N95?

A: Regulatory requirement is a fit test with the specific model. If the 4700 N100 uses a substantially similar facepiece geometry to the 4600, some programs may accept the fit test result — but OSHA strictly requires testing with the actual model to be worn. Consult your program administrator and conduct a new fit test to be fully compliant.

Q: What is the AirWave design and why does it help with N100 media?

A: AirWave is Moldex's deeply domed cup that creates a breathing chamber between the filter and the face. With N100's higher resistance media, the breathing chamber buffers inhalation peaks and reduces perceived resistance compared to a flat or shallow cup geometry.

Q: Where can I buy the Moldex 4700 N100?

A: Available at WC Safety's disposable respirators collection and on Check Price on Amazon →.

Q: Is the Moldex 4700 N100 useful for beryllium?

A: For non-oil beryllium-containing dust and fume, N100 filtration meets the OSHA beryllium standard's efficiency requirement (≥99.97%). Verify the specific concentration tier and required APF for the operation under OSHA 1910.1024 before specifying.

Q: How does the 4700 compare to the 4701 N100?

A: Facepiece size only. The 4700 is standard size; the 4701 is Small size. Both provide identical N100 filtration, SmartStrap headband, AirWave dome, and Ventex valve. Choose based on fit test results.

Q: What is the shelf life of the Moldex 4700 N100?

A: Moldex publishes a 5-year shelf life from manufacture date for uncontaminated disposable respirators stored in original packaging away from UV, high humidity, ozone, and chemical vapors.

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Disclosures & editorial standards
WC Safety participates in the Amazon Services LLC Associates Program. Outbound Amazon links are affiliate links. We accept no manufacturer payment, sponsorship, or product samples. This content is not medical, legal, or regulatory advice. Safety equipment selection is governed by applicable OSHA standards and your facility's safety program.
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Pros & Cons

Pros
  • Maximum NIOSH particulate class: ≥99.97% filtration (N100), the functional equivalent of HEPA, in a fully disposable format
  • Zero maintenance — no cleaning, no cartridge storage, no gasket inspection; discard at end of shift
  • AirWave undulating breathing surface increases filter area so the dense N100 media breathes far easier than a flat N100 cup
  • Ventex exhalation valve cuts heat and moisture build-up, making extended N100 wear practical in hot work
  • SmartStrap adjustable headband lets one respirator be tuned to the wearer instead of a fixed staple-mount strap
  • Available in a standard 4700 and small-profile 4701 so a single SKU family fits a mixed crew
Cons
  • N-rated only — provides no protection in oil-containing aerosols, where a P100 is mandatory
  • Single-shift disposable economics get expensive fast in a daily N100 program versus a reusable P100 elastomeric
  • Valved design is unacceptable as source control / for sterile-field or surgical use
  • Still a tight-fitting half-mask: APF 10 ceiling regardless of the N100 media, so high-exposure jobs need a higher-APF respirator
  • No replaceable cartridge — when the media loads or straps fail the whole unit is scrapped

Who It's For

Buy it if:

  • Asbestos, lead, and silica abatement crews needing 99.97% filtration without the cleaning and storage overhead of elastomerics
  • Maintenance and demolition workers facing non-oil toxic metal dusts (beryllium, cadmium, manganese) on intermittent jobs
  • Healthcare and lab staff in TB or HEPA-equivalent isolation tasks who want a disposable, fit-tested option
  • Employers wanting a no-maintenance N100 for occasional high-hazard tasks rather than a daily-use program
  • Workers who find dense N100 cups suffocating and need the AirWave/valve breathability advantage

Look elsewhere if:

  • Anyone exposed to oil mist or oil-based aerosols — this is N-rated and must be a P100 instead
  • High-volume daily N100 users for whom a reusable P100 elastomeric is far cheaper per shift
  • Jobs requiring source control or a clean/sterile field, where a valved respirator is prohibited
  • Operations needing protection above APF 10, which requires a full-face or supplied-air respirator

Related Resources

Frequently Asked Questions

Is the Moldex 4700 N100 worth the cost premium over a 4600 N95 for routine dust?

For routine nuisance or general construction dust, no — an N95 already captures ≥95% and meets most general-industry needs at a fraction of the price. The 4700 N100 is justified only when a written exposure assessment or a substance-specific OSHA standard demands ≥99.97% efficiency, such as asbestos, lead, or certain toxic metal dusts. Buy the filter class your hazard assessment requires, not the highest number available. Our respiratory protection complete guide walks through matching filter class to hazard.

How does the disposable 4700 N100 compare to a reusable P100 elastomeric for total cost of ownership?

On a single high-hazard task the disposable wins — no facepiece, no cartridges, no cleaning labor. But in a recurring daily program the math flips: a reusable elastomeric with replaceable P100 filters like the Honeywell North 75FFP100 amortizes across months, and only the filters are consumed. As a rule of thumb, intermittent or visitor use favors the 4700; sustained daily use favors a P100 elastomeric. Note the elastomeric also gives you P100 oil resistance the 4700 lacks.

When would I choose the 4700 N100 over a Honeywell North P100 filter and cartridge setup?

Choose the 4700 when you want maximum particulate protection with zero maintenance and no fit-storage logistics — grab, don, discard. Choose a North P100 filter such as the 7580P100 or the snap-on 75SCP100L when you need oil resistance (P vs N), reuse economics, or the option to add gas/vapor cartridges to the same facepiece. The disposable cannot be upgraded to chemical protection; the elastomeric can.

Does the N100 media on the 4700 clog faster than an N95, and does that change my change-out timing?

Denser N100 media can load more quickly in heavy-dust environments, and the practical end of service for any particulate respirator is increased breathing resistance — when it becomes noticeably harder to inhale, change it. Unlike a gas cartridge there is no chemical breakthrough and no ESLI gauge; particulate filters are discarded on resistance, damage, or soiling. The 4700 is single-shift disposable regardless, so you replace the whole unit rather than a filter.

Can I attach gas or vapor cartridges to the 4700 N100 if I encounter solvents?

No. The 4700 N100 is a one-piece disposable particulate respirator with no cartridge mount — it offers no protection against organic vapors, acid gases, or any gas/vapor hazard. If your job mixes particulates with solvents or acid gas, you need a reusable elastomeric with combination cartridges. Review how to choose a respirator cartridge to size up a combination setup on a proper facepiece.

Is the AirWave breathability advantage real enough to justify picking it over a flat N100 cup?

The AirWave's undulating, pleated breathing surface genuinely increases the available filter area, which lowers inhalation resistance compared with a flat N100 panel of the same footprint — a meaningful comfort factor because N100 media is inherently denser and harder to breathe through than N95. For workers who report the standard N100 cup as suffocating, that lower resistance often determines whether the respirator is actually worn all shift, which is the real protection metric.

How do I decide between the standard 4700 and the small-size 4701 for my crew?

Both are the same N100 AirWave respirator; the 4701 is a smaller-profile build for smaller faces. Don't guess — assign by fit-test result. A respirator only delivers its rated protection if it passes a fit test on that specific wearer, so issue whichever size each worker passes on. Stocking both lets a mixed crew get a sealing fit from one product family rather than sourcing across brands.

For TB or HEPA-equivalent healthcare tasks, is the 4700 a reasonable disposable choice?

It is a defensible option where a HEPA-equivalent, fit-tested, single-use particulate respirator is wanted, since ≥99.97% N100 efficiency meets the HEPA filtration threshold. The trade-off is the exhalation valve — a valved respirator is unacceptable for source control or any sterile-field task, so it suits wearer-protection isolation work but not procedures requiring an unvalved respirator. Confirm your facility's respiratory protection program permits a valved model for the specific task.

Does buying N100 instead of N95 raise my assigned protection factor?

No. Filter class (N95 vs N99 vs N100) describes filtration efficiency, not assigned protection factor. APF is set by facepiece type: any tight-fitting half-mask, N95 or N100, carries an APF of 10 under OSHA. Going to N100 reduces the fraction of particles that penetrate the media but does not let you work at higher exposure multiples — for that you need a full-face or supplied-air respirator. So buy N100 for the filtration standard, not to raise your APF.

Is the 4700 N100 a good fit for an occasional-use program versus a daily-use one?

It shines in occasional and intermittent programs — annual asbestos sampling, periodic lead disturbance, a visiting contractor — because there is nothing to maintain between uses and no cartridge inventory to age out. For daily, full-shift exposure the per-shift disposable cost and the waste stream make a reusable P100 elastomeric the more economical long-run answer. Match the format to how often the hazard actually recurs.

How does the 4700 N100 stack up against Honeywell North's bayonet P100 filters overall?

Different tools. The 4700 is a self-contained disposable N100 — simplest possible logistics, no facepiece, but N-rated and single-shift. North's bayonet P100 line, such as the 7581P100L or pancake-style 7583P100L, is P-rated (oil-proof), reusable, and mounts to a cleanable facepiece, at the cost of cleaning and filter-tracking labor. Pick the disposable for convenience and non-oil hazards, the elastomeric for oil resistance and reuse economics.

Will switching workers to the 4700 N100 require a new fit test?

Yes — a fit test is model-specific, so a worker fit-tested on a different respirator must be fit-tested on the 4700 (or 4701) before relying on it. You cannot carry a fit test across models or brands, even within the same Moldex family at a different efficiency class. Budget fit-testing time into any program change. See the respiratory protection range for fit-test supplies.

For silica dust on intermittent demolition, is N100 overkill or appropriate?

For respirable crystalline silica, the required respirator depends on your measured or estimated exposure relative to the OSHA limit; many silica tasks are adequately served by an N95 at APF 10, while higher exposures call for greater protection than a half-mask provides. The 4700 N100 is appropriate when you specifically want maximum filtration efficiency in a disposable half-mask, but it does not raise the APF 10 ceiling — verify your silica exposure assessment dictates the format you buy.

Is there a meaningful difference in protection between the 4700 N100 and an N99 disposable?

In filtration efficiency the gap is small in absolute terms — N99 is ≥99% and N100 is ≥99.97% — but N100 is the only class that meets the HEPA-equivalent threshold and is what substance-specific standards typically reference for the most hazardous non-oil dusts. If your program or a regulation calls out N100 (or HEPA), do not substitute N99. If the assessment only requires N99, the 4700's premium isn't buying you required protection.

What should I budget alongside the 4700 N100 to run a compliant program?

Beyond the respirators themselves, an OSHA 1910.134 program needs medical evaluation, fit testing, training, and a written program — costs that apply regardless of which model you choose. Because the 4700 is disposable you skip cleaning supplies and replacement-cartridge inventory, but you must budget a higher per-shift consumable rate. Browse the moldex respirator cartridges and filters range if you later move to a reusable platform.

Why trust WC Safety
Industrial PPE specialists. We do not accept manufacturer payment for placement.
Reviewed by
Steven Eaton, WC Safety Editorial Team — guidance reflects current OSHA, NIOSH and ANSI practice.
Our standards
Ratings combine published specs, hands-on familiarity, and verified customer data where available; we do not fabricate lab tests.
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Filed in: airwave, disposable-respirator, moldex, n100, smartstrap, ventex-valve
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