Best Honeywell North Cartridge for Welding (2026)
Best Honeywell North Cartridge for Welding
Reviewed by WC Safety Editorial Team — Last updated: June 2026.
Quick Answer
Welding fume is particulate metal oxide, so the Honeywell North answer is a P100 filter — not a vapor cartridge — unless the metal is coated. The coating is the variable that decides whether you also need vapor and acid-gas protection.
| User | Best North Choice | Why |
|---|---|---|
| Most welders (clean metal) | 7580P100 or 75FFP100 (P100) | 99.97% capture of metal fume particulate |
| Galvanized / coated / painted | 7583P100L (OV + AG + P100) | Adds vapor and acid-gas coverage for coatings |
| Production / high-fume work | P100 on a PAPR welding helmet | Higher APF, less heat and breathing effort |
| Solvent-cleaned metal | 7581P100L (OV + P100) | Covers residual solvent vapor plus fume |
For clean mild steel, a 7580P100 or 75FFP100 under your welding helmet is correct. The moment you weld galvanized, painted, or coated metal, move up to the 7583P100L. A vapor cartridge alone never works for welding — it ignores the fume, as explained in Organic Vapor vs P100.
Understanding the Hazard: Welding Fume
Welding fume is the cloud of microscopic metal-oxide particles created when the arc vaporizes metal and it instantly condenses in air. The particles are small enough to reach deep into the lungs, and their toxicity depends on the base metal and any coating.
How exposure occurs. Every arc-welding process — stick, MIG, TIG, flux-cored — generates fume, concentrated in the breathing zone when a welder leans over the work. Confined spaces, poor ventilation, and overhead welding sharply increase exposure. Coated metals add vapors and gases on top of the fume.
What is in the fume. Manganese (linked to Parkinson-like neurological effects), hexavalent chromium on stainless steel (a carcinogen regulated under OSHA 1910.1026), zinc oxide on galvanized steel (causing metal fume fever), nickel, iron oxide, and lead on painted or older metal. Arc ultraviolet light also generates ozone and nitrogen oxides.
Short-term risks: metal fume fever, airway irritation, and headaches. Long-term risks: manganism and other neurological harm, lung cancer from hexavalent chromium and nickel, siderosis, and chronic respiratory disease. Common environments: fabrication shops, structural steel, shipbuilding, pipe welding, maintenance, and manufacturing.
Which Honeywell North Filter Is Best for Welding?
Primary recommendation: a North P100 — the 7580P100 or 75FFP100. For welding clean mild steel and most general fabrication, the P100 captures the metal fume at 99.97 percent and is the correct, economical choice worn under the welding helmet.
Coated metals: the 7583P100L (OV + acid gas + P100). Galvanized, painted, primed, and solvent-cleaned metals release vapors and acid gases the coating produces, so the combination cartridge covers both the fume and the vapor. This is the right call whenever there is a coating on the work.
Solvent residue: the 7581P100L (OV + P100). When metal has been degreased and solvent vapor lingers, the OV/P100 combination covers the residual vapor alongside the fume.
Maximum protection: P100 on a PAPR welding helmet. For production welding, stainless (hexavalent chromium), and confined spaces, a PAPR delivers filtered air at a higher protection factor with far less heat and breathing effort. Do not rely on the vapor-only N75001L or the N75002L acid-gas cartridge alone — neither stops the particulate fume. When unsure, start with how to choose a respirator cartridge.
Honeywell North Cartridge Comparison Table for Welding
| Cartridge / Filter | Protection Type | P100 | Suitable for Welding? | Strengths | Limitations | Recommended Use |
|---|---|---|---|---|---|---|
| 7580P100 | P100 particulate | Yes | Yes — ideal | 99.97% fume capture | No vapor protection | Clean-metal welding |
| 75FFP100 | P100 particulate | Yes | Yes — ideal | Low profile under helmet | No vapor protection | Clean-metal welding |
| 7583P100L | OV + AG + P100 | Yes | Yes — coated metal | Fume + coating vapors | Heavier, costlier | Galvanized, painted, coated |
| 7581P100L | OV + P100 | Yes | Yes (solvent residue) | Fume + solvent vapor | No acid-gas coverage | Solvent-cleaned metal |
| 75SCP100L | Multi-contaminant + P100 | Yes | Yes (broad) | Fume + many gases | Highest cost | Mixed coated-metal shops |
| N75001L | Organic vapor | No | No | Solvent vapor | No particulate protection | Solvents — not fume |
| N75002L | Acid gas | No | No | Acid gases | No particulate protection | Acid gas — not fume |
| N75003L | Ammonia | No | No | Ammonia | No particulate protection | Refrigeration — not welding |
| N75004L | Formaldehyde | No | No | Formaldehyde | No particulate protection | Labs — not welding |
| 75SCL | Multi-gas (no P100) | No | No | Multi-gas vapor | No particulate protection | Gases — not fume |
Best Honeywell North Filters for Welding — In Depth
Honeywell North 7580P100 / 75FFP100 (P100)
Protection: 99.97 percent P100 particulate. Ideal applications: stick, MIG, TIG, and flux-cored welding of clean mild steel and stainless. Strengths: excellent fume capture, low profile under a welding helmet, economical. Weaknesses: no vapor or gas protection. Choose it when the metal is clean and uncoated. Do not choose it when welding galvanized or painted metal. Read the 7580P100 review and 75FFP100 review.
Honeywell North 7583P100L (OV + Acid Gas + P100)
Protection: organic vapor and acid gas plus a P100 filter. Ideal applications: welding galvanized, painted, primed, or solvent-cleaned metal where coatings off-gas vapors and acid gases. Strengths: covers both the fume and the coating vapors in one cartridge. Weaknesses: heavier and costlier than a plain P100. Choose it when the work has any coating. Do not choose it when welding clean metal makes the P100 sufficient. Read the 7583P100L review.
Honeywell North 7581P100L (OV + P100)
Protection: organic vapor plus P100. Ideal applications: welding metal that has been degreased with solvents that still off-gas. Strengths: handles residual solvent vapor and metal fume together. Weaknesses: no acid-gas coverage for heavier coatings. Choose it when solvent residue is the added concern. Do not choose it when galvanizing or paint calls for the 7583P100L. Read the 7581P100L review.
Recommended Honeywell North Respirators for Welding
Welders integrate respiratory protection with the welding helmet, so the choice is usually a half mask under the helmet or a PAPR welding helmet. All North filters share the bayonet mount.
| Respirator | Type / APF | Best Welding Use |
|---|---|---|
| North 5500 | Half mask / APF 10 | Economical P100 under the helmet, light welding |
| North 7700 | Half mask (silicone) / APF 10 | Comfortable all-day fabrication welding |
| North 5400 | Full face / APF 50 | Coated-metal welding needing eye protection |
| North 7600 | Full face (silicone) / APF 50 | Heavy coated-metal and confined-space welding |
For most welding, a North 5500 or North 7700 half mask with a P100 worn under the welding helmet is the practical, economical setup, with the silicone-sealed 7700 favored for long shifts. For high-fume production, stainless hexavalent chromium, and confined spaces, a PAPR welding helmet delivers filtered air at a higher protection factor with less heat and breathing effort. A North 5400 or North 7600 full-face is an option when welding coated metal away from a fixed helmet. Compare half masks in the North 5500 vs 7700 comparison and full-face models in the North 5400 vs 7600 comparison, and browse North half masks and North full-face respirators. One filter platform serves the whole shop — see the Honeywell North cartridge guide.
Common Cartridge Selection Mistakes for Welding
1. Using a vapor cartridge for welding fume. A vapor cartridge does nothing for particulate metal fume. Welding always needs P100 first; vapor sorbent is an add-on only for coated metals.
2. Welding galvanized or painted metal with a plain P100. Coatings off-gas vapors and acid gases. For galvanized, painted, primed, or solvent-cleaned metal, use the 7583P100L, not a bare P100.
3. Settling for an N95 on production welding. N95 is the minimum for light intermittent work only. Manganese, hexavalent chromium, and zinc oxide demand the 99.97 percent efficiency of a P100.
4. Expecting a cartridge to remove ozone. Air-purifying cartridges do not reliably capture ozone from the arc. Control ozone with ventilation, and never weld near chlorinated solvents.
5. Ignoring fit testing and the seal under the helmet. A leaking half mask under a welding helmet lets fume bypass the filter. Fit test under OSHA 1910.134(f) and keep the seal clean-shaven.
6. Running a fume-clogged filter. Heavy welding loads P100 filters fast. Replace on rising breathing resistance rather than pushing a clogged filter through another job.
When Should You Replace North Welding Filters?
The P100 layer loads mechanically with fume and is replaced on resistance and condition; the vapor layer of a 7583P100L follows an odor-and-schedule rule. Heavy welding loads filters quickly.
| Component | Replace When | Notes |
|---|---|---|
| P100 filter (7580P100 / 75FFP100) | Breathing resistance rises, or soiled/wet/damaged | Mechanical loading; heavy fume loads fast |
| Vapor layer (7583P100L / 7581P100L) | Per change schedule; at odor breakthrough | Only relevant on coated metal |
| Confined-space / high-fume work | Frequently — possibly within a shift | Concentrated fume loads filters rapidly |
| Filter gets wet | Replace | Moisture can damage media |
| Stored / unopened | By printed expiration date | Media degrades over years even sealed |
Given the carcinogens in welding fume, change P100 filters early rather than running them to maximum loading. For the full methodology, see how long do respirator cartridges last and OSHA 29 CFR 1910.134; for the color code (P100 magenta), see the respirator cartridge color chart.
Frequently Asked Questions
What Honeywell North filter is best for welding?
Welding fume is particulate metal oxide, so the best Honeywell North choice is a P100 filter — the 7580P100 or 75FFP100, at 99.97 percent efficiency. If you weld galvanized, coated, painted, or solvent-cleaned metal, vapors and acid gases can also be present, so step up to the 7583P100L (organic vapor + acid gas + P100).
Do I need a P100 or a vapor cartridge for welding?
Plain welding fume is particulate, so a P100 filter is the core protection. You only add a vapor cartridge when the base metal is coated, galvanized, painted, or solvent-cleaned, which releases vapors and acid gases. For those jobs use the 7583P100L. For clean mild steel, a P100 alone is correct.
Is N95 enough for welding fume?
An N95 is the bare minimum for light, intermittent welding, but P100 is strongly preferred. Welding fume contains manganese, hexavalent chromium on stainless, zinc oxide on galvanized, and other toxic metals, so the 99.97 percent efficiency and reusable elastomeric seal of a North P100 is the professional standard for repeated welding.
What North filter do I use for welding galvanized steel?
Galvanized steel releases zinc oxide fume (causing metal fume fever) and the coating can off-gas vapors, so use the 7583P100L (OV + acid gas + P100) rather than a plain P100. For heavily coated or solvent-cleaned metal, the combination cartridge covers both the particulate fume and the vapors the coating produces.
Does a North cartridge protect against welding ozone?
Air-purifying cartridges do not reliably remove ozone, which is generated by the ultraviolet light of arc welding. Ozone control relies on ventilation and local exhaust, not the cartridge. A P100 filter handles the particulate fume; manage ozone with engineering controls and by keeping the arc away from chlorinated solvents.
What respirator do welders use with North filters?
Welders commonly wear a North half mask with P100 filters under the welding helmet, or a powered air-purifying respirator (PAPR) welding helmet that combines eye, face, and respiratory protection with filtered airflow. PAPRs are popular for production welding because they reduce heat and breathing effort over long shifts.
Can welding fume pass through a North P100 filter?
No. P100 captures 99.97 percent of particles down to 0.3 microns, and welding fume particles are efficiently trapped. The weak point is face-seal fit, not the filter, which is why fit testing and a clean-shaven seal matter. A leaking respirator lets unfiltered fume bypass even a perfect P100.
How long does a North P100 last when welding?
P100 filters load mechanically rather than chemically saturating. Replace when breathing resistance rises, when the filter is visibly soiled with fume or damaged, or when it gets wet. Heavy welding loads filters quickly, so inspect and change them often. The vapor layer of a 7583P100L follows a separate change schedule.
Do I need a full-face respirator for welding?
Welders usually rely on the welding helmet for eye and face protection, with a half mask and P100 underneath, or a PAPR welding helmet. A standalone full-face APR is less common because the helmet handles eye protection, but a PAPR helmet offers the best combination of comfort and protection for high-fume work.
What North filter do I use for stainless steel welding?
Stainless welding produces hexavalent chromium, a known carcinogen, in the fume, so robust P100 protection is essential — the 7580P100 or 75FFP100, often on a PAPR for production work. If the stainless is coated or solvent-cleaned, add vapor protection with the 7583P100L. Hexavalent chromium exposure is regulated under OSHA 1910.1026.
Are Honeywell North welding filters NIOSH approved?
Yes. The 7580P100, 75FFP100, and 7583P100L are NIOSH-approved under 42 CFR Part 84 for their particulate and, for the combination cartridge, gas and vapor classes. Use them within an OSHA 1910.134 respiratory protection program with fit testing and medical evaluation.
Can North welding filters fit a 3M respirator?
No. North filters fit only North facepieces via the North bayonet. They will not seal on a 3M, MSA, or Moldex respirator. The North 7580P100 is the equivalent of the 3M 2091, but the two are not interchangeable across brands.
What size North respirator should a welder buy?
North respirators come in small, medium, and large; most adults fit medium, but only a fit test under OSHA 1910.134(f) confirms it. Welders must also confirm the respirator seals under the welding helmet and that facial hair does not break the seal.
Is welding fume really dangerous?
Yes. Welding fume contains manganese (linked to neurological effects), hexavalent chromium on stainless (a carcinogen), zinc oxide on galvanized (metal fume fever), nickel, lead on painted metal, and more. Effects range from acute metal fume fever to chronic lung disease, neurological harm, and cancer, which is why consistent P100 protection matters.
What North filter do I use for welding painted or primed metal?
Painted and primed metal can release organic vapors, lead (on older paint), and acid gases when welded, so a plain P100 is not enough. Use the 7583P100L (OV + acid gas + P100) to cover both the metal fume and the coating vapors. For lead paint, P100 also captures the lead particulate.
Can North P100 filters be reused after welding?
Yes, until they load. A P100 is reusable until breathing resistance rises or it is soiled, wet, or damaged. Store it in a clean sealed container between shifts so it does not collect fume off the face. Never share filters between welders.
What is the difference between the 7580P100 and 7583P100L for welding?
The 7580P100 is a pure P100 filter — correct for clean-metal welding fume. The 7583P100L adds organic-vapor and acid-gas sorbent plus P100, for welding coated, galvanized, painted, or solvent-cleaned metal that releases vapors. Match the cartridge to whether the metal has a coating.
Do I need respiratory protection for occasional hobby welding?
Even hobby welding produces toxic fume, so at minimum use a P100 — a North half mask with a 7580P100 or 75FFP100 under your helmet, plus ventilation. Galvanized and coated metals are especially hazardous; never weld them without proper fume control and a P100, regardless of how brief the job.
How do I know when my welding filter needs replacing?
Replace the P100 when breathing becomes harder (loading with fume), when it is visibly soiled or damaged, or when it gets wet. If you use a 7583P100L on coated metal and smell vapor breakthrough, replace the cartridge. Do not push a clogged filter through another job.
Is a PAPR better than a half mask for welding?
For production welding, often yes. A PAPR welding helmet delivers filtered air at positive pressure, reducing breathing effort and heat over long shifts and giving a higher assigned protection factor, while integrating eye and face protection. A North half mask with P100 under the helmet is the economical option for lighter or intermittent welding.
Where can I learn more about welding filter selection?
See our complete Honeywell North cartridge guide for the full selection chart and the universal bayonet, and our best respirator for asbestos guide for parallel particulate-protection detail. For P100 versus other classes, read Organic Vapor vs P100.
More Honeywell North Cartridge Resources
- Honeywell North Cartridge Guide — the full pillar: every model, chart, and replacement schedule
- Best Honeywell North Filters & Cartridges — overview and lineup
- 7580P100 vs 75FFP100 — the two North P100 filters compared
- Best Respirator for Asbestos — parallel particulate-protection guidance
- How to Choose a Respirator Cartridge • Organic Vapor vs P100
- Shop P100 filters • Honeywell North cartridges • North half masks
Disclosures & editorial standards
WC Safety participates in the Amazon Services LLC Associates Program. Outbound Amazon links on this page are affiliate links. We accept no manufacturer payment, sponsorship, or product samples. This content is not medical, legal, or regulatory advice. Respiratory protection must be based on a documented workplace hazard assessment and fit testing under OSHA 29 CFR 1910.134. Above a contaminant's IDLH, only supplied-air or SCBA is acceptable. Consult a Certified Industrial Hygienist (CIH) for site-specific guidance.
WC Safety participates in the Amazon Services LLC Associates Program. Outbound Amazon links on this page are affiliate links. We accept no manufacturer payment, sponsorship, or product samples. This content is not medical, legal, or regulatory advice. Respiratory protection must be based on a documented workplace hazard assessment and fit testing under OSHA 29 CFR 1910.134. Above a contaminant's IDLH, only supplied-air or SCBA is acceptable. Consult a Certified Industrial Hygienist (CIH) for site-specific guidance.