Gerson 1745 N95 Respirator with OV-AG Nuisance Relief – Organic Vapor and Acid Gas, Made in USA (Box of 10)

The Gerson 1745 N95 Respirator with OV-AG Nuisance Relief is a specialty disposable respirator that adds a layer of activated carbon to the standard N95 particulate filter platform. This activated carbon layer provides comfort relief against nuisance levels of organic vapor (OV) and acid gas (AG) — concentrations that do not rise to IDLH or PEL levels, but are detectable and uncomfortable during extended wear. NIOSH approved for ≥95% particulate filtration. Manufactured in the USA. Each box contains 10 respirators.

Construction and Materials

The 1745 uses Gerson's double-shell collapse-resistant molded cup construction with an internal activated carbon layer positioned between the outer shell and the NIOSH-certified N95 filter media. A contoured adjustable nose clip reduces fogging. A soft foam nose cushion provides a comfortable seal at the bridge of the nose. An oversized exhalation valve expels warm exhaled air for comfort during extended wear. Head straps are smooth latex-free polymer, staple-free construction throughout. A retail 2-pack format is also available under part number 1745-Rep-2-Pk.

Compliance and Ratings

NIOSH approved for ≥95% filtration efficiency against non-oil-based airborne particles per 42 CFR Part 84. The activated carbon layer provides nuisance-level relief only — it is not approved as an OV/AG cartridge respirator under 42 CFR Part 84 cartridge standards. The distinction is critical: the 1745 is appropriate only where OV/AG concentrations are at nuisance levels (detectable odor, mild irritation) — not where OSHA PELs or NIOSH RELs are approached or exceeded.

Performance

The activated carbon layer's primary effect is odor and mild irritant reduction, which directly impacts compliance in environments where organic vapor or acid gas presence causes workers to remove masks prematurely. In painting prep areas, solvent storage, light chemical handling, and agricultural environments with pesticide exposure at nuisance levels, the 1745 maintains wearer tolerance without requiring a full cartridge respirator program. The N95 particulate component delivers the same filtration performance as the 1730 and 1740 platforms.

Strengths

• Activated carbon layer provides OV-AG nuisance relief within a disposable N95 format
• N95 NIOSH certification for ≥95% particulate filtration
• Exhalation valve improves comfort during extended wear
• Collapse-resistant double-shell maintains structure and filter integrity
• Made in USA — ISO 9001:2015 certified facility, Middleboro, MA

Limitations

• OV-AG layer provides nuisance relief only — not rated for chemical cartridge protection at or above OSHA PEL concentrations
• N-series particulate rating only — oil mist environments require R or P series
• Activated carbon has a finite adsorption capacity; breakthrough occurs faster in high-concentration environments
• Not a substitute for a half-mask or full-face respirator with OV/AG cartridges in regulated chemical environments

Recommended Use Cases

The 1745 is appropriate for painting preparation (sanding, scuffing), light solvent handling, agricultural operations with pesticide exposure below PEL, janitorial and cleaning operations with mild chemical exposure, and any environment where the primary hazard is particulate with secondary nuisance-level chemical odor. It is not appropriate where the OV or AG concentration is at or near the OSHA permissible exposure limit.

Verdict

The Gerson 1745 resolves a compliance gap: environments with N95-level particulate hazards plus nuisance-level chemical odors that cause workers to resist mask programs. The activated carbon layer improves adherence without escalating to a full cartridge respirator program. When concentrations rise to PEL-relevant levels, the appropriate upgrade is a half-mask with OV/P100 cartridges — not a disposable nuisance-relief mask.

FAQ

What is the difference between nuisance-level OV-AG relief and full cartridge protection?

Nuisance-level relief means the activated carbon reduces detectable odors and mild irritation from low concentrations of organic vapors and acid gases. Full cartridge protection requires an approved OV/AG cartridge respirator tested to NIOSH 42 CFR Part 84 cartridge standards with a service life rating. The 1745 does not carry cartridge certification and is not appropriate for concentrations at or near OSHA permissible exposure limits.

Is the Gerson 1745 appropriate for spray painting?

The 1745 provides nuisance relief for mild solvent odors during painting prep (sanding, surface preparation). It is not rated for spray painting where solvent vapor concentrations can exceed nuisance levels. Full spray painting applications require an OV/P100 half-mask or supplied-air respirator.

How does the activated carbon layer affect breathing resistance?

The activated carbon layer adds a modest increase in breathing resistance compared to the standard 1740. The exhalation valve compensates by reducing exhalation resistance. Net breathing effort is comparable to other molded cup N95 respirators with valves.

What is the box and case quantity for the 1745?

Each box contains 10 respirators. A standard case contains 10 boxes (100 units total).

Can the Gerson 1745 be used for agricultural pesticide applications?

For pesticide handling at nuisance-level concentrations, the 1745's OV-AG carbon layer provides odor relief alongside N95 particulate filtration. For regulated pesticide applications where EPA label or OSHA 29 CFR 1910.1048 specifies a particular respirator type, verify that the 1745 meets the label requirement before specifying.