Gerson 1845 R95 Particulate Respirator with Valve, Gasket, and Nuisance Vapor Relief (Box of 5)

Gerson 1845 R95 Particulate Respirator with Valve and Gasket — Box of 5 — NIOSH-Approved R95 Disposable Respirator

Gerson 1845 R95 Particulate Respirator with Valve and Gasket — Box of 5 is the boxed packaging variant of Gerson's 1840 R95 — the same foam face gasket and exhalation valve on the R95 cup design, packaged in a box instead of a bag for easier shelf storage in supply rooms and tool cribs at industrial facilities.

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The Gerson 1845 R95 Particulate Respirator with Valve and Gasket — Box of 5 is a NIOSH-approved R95 filtering facepiece respirator from Gerson, listed on the NIOSH Certified Equipment List. Read the complete disposable respirator guide to compare NIOSH filter classes before ordering.

Key Features — 1845

• NIOSH R95 approval for oil-resistant particulates at minimum 95% efficiency for one shift
• Foam face gasket for improved comfort and reduced pressure during extended wear
• Exhalation valve routes exhaled air out for cooler wear in spray-paint environments
• Box packaging for shelf storage in supply rooms and tool cribs
• 5-count box for individual or small-crew R95 purchasing

Specifications

Typical Applications

• Extended spray painting with foam gasket comfort; see all R95 respirators
• Supply room stocking where boxed packaging is preferred over bag
• Oil-mist machining and automotive body work; see all disposable respirators
• Compare to P100 for sustained oil: read our N95 vs P100 guide

Hazard Coverage — Gerson 1845 R95 Particulate Respirator with Valve and Gasket — Box of 5

The Gerson 1845 R95 Particulate Respirator with Valve and Gasket — Box of 5 is NIOSH-approved under 42 CFR 84 Subpart K as an R95 respirator: ≥95% filtration, rated for both non-oil and oil-resistant particulates for up to one work shift of oil aerosol exposure. Covered environments: spray painting, automotive body work, machining with cutting fluids, oil-mist coolants. Browse all R95 respirators.

The R95 is oil-resistant not oil-proof — after one shift of continuous oil exposure, discard the 1845. Step up to a P100 for heavy or extended oil mist. See our N95 vs P100 guide.

Compare 1845 vs 1840 vs 1940

Frequently Asked Questions

What does the exhalation valve on the 1845 do?

The exhalation valve opens when you breathe out, allowing warm humid air to exit directly rather than passing back through the filter media. This reduces heat and moisture buildup inside the mask — a significant comfort advantage during extended or physically demanding wear. Inhalation closes the valve, so all inhaled air is filtered normally.

Does the valve on the 1845 reduce filtration efficiency?

No. The exhalation valve does not affect inhalation filtration efficiency — the 1845 still filters inhaled air at the rated N95/R95/P100 level. The valve only controls exhaled air routing. Note: because exhaled air is not filtered, valved respirators are not appropriate as source-control devices (e.g., in surgical environments or when protecting others from the wearer).

Is a valved respirator like the 1845 acceptable for source control?

No. A valved respirator directs exhaled air outward unfiltered and is not appropriate where the wearer must also protect others (surgical settings, some healthcare environments). Facility policies may prohibit valved masks in sterile or at-risk patient areas. For source-control requirements, use an unvalved N95 or a surgical N95.

Is the 1845 NIOSH-approved for oil mist?

Yes. The 1845 holds NIOSH R95 approval under 42 CFR 84 Subpart K, confirming ≥95% filtration of both non-oil and oil-resistant particulates. The R in R95 means the mask is approved for oil-based aerosols for up to one work shift (8 hours of continuous oil aerosol exposure). Compare classes in our N95 vs P100 guide.

What is the difference between R95 and N95 for the 1845?

The 1845 is rated R95 — oil-resistant (one shift) — while N95 masks are rated for non-oil environments only. If you spray paint, work with cutting fluids, or handle oil mist, the R95 class is the correct minimum; for extended or heavy oil exposure, step up to a P100 (oil-proof, no time limit). Browse all R95 respirators.

Can the 1845 be used for spray painting?

Yes, the 1845's R95 rating covers oil-based aerosols including spray paint and primer mist for up to one shift. OSHA recommends pairing it with forced-air ventilation in enclosed spray environments. For longer exposures or lacquers with solvent vapors, also consider an OV cartridge — the R95 particle filter alone does not capture organic vapors.

Does the 1845 require a fit test?

Yes. OSHA 29 CFR 1910.134 mandates a fit test before first workplace use of any tight-fitting respirator. See our fit testing guide for the qualitative and quantitative options. Proper seal at the nose bridge and chin is required for rated R95 performance.

How long can I use the 1845 in an oil mist environment?

The R95 class is approved for up to one work shift of oil aerosol exposure; after that, oil can degrade the electret filter media and reduce efficiency below 95%. Discard the 1845 at end of shift if used in oil-mist conditions, or sooner if breathing resistance increases noticeably.

What does the 1845 NOT protect against?

The 1845 protects against oil and non-oil particulates only — it does not filter gases, vapors, or chemical vapors such as organic solvents or acid gases. Nuisance-relief versions add a thin sorbent layer for comfort only, not IDLH chemical protection. For vapor hazards, use a half-face or full-face respirator with an OV or AG cartridge.

Can I use the 1845 for welding?

Welding fume is classified as a particulate hazard. An R95 like the 1845 provides adequate particle protection for mild steel MIG/TIG welding. For stainless steel, galvanized metal, or chromate primer grinding — which generate hexavalent chromium — a P100 provides higher protection. Check your welding fume exposure assessment or SDS.

How many 1845 respirators come in a box?

Pack size is shown in the product title. For bulk orders, contact our B2B team for volume pricing. Browse all R95 respirators for available pack formats.

Is the 1845 reusable?

No, the 1845 is a disposable respirator. Discard it when soiled, damaged, breathing becomes difficult, or at end of shift in oil-mist environments. Attempting to clean or wash a disposable N95/R95 can damage the electret filter and reduce filtration efficiency without providing any visible indication.