Elastomeric Respirators

Overview

There are three types of elastomeric respirators:

• Elastomeric quarter facepiece respirators
• Elastomeric half mask respirators (EHMRs)
• Elastomeric full facepiece respirators

Elastomeric respirators are reusable devices. They must form a tight seal to the user's face; and therefore, require fit testing. Some elastomeric respirators have an exhalation valve. These valves can increase the user's comfort by reducing breathing, removing moisture, and reducing CO₂ concentrations inside the respirator.

Elastomeric respirators protect against gases, vapors, and particles if equipped with the appropriate filters, cartridges, or canisters. To protect workers from hazardous particles, elastomeric respirators can be equipped with the same nine filter classes as filtering facepiece respirators.

View LargerDownload

Download English, Spanish, Arabic, Chinese, Tagalog, Vietnamese

Elastomeric quarter facepiece

Elastomeric quarter facepiece respirators are reusable devices with exchangeable cartridges or filters. They protect against particles, gases, or vapors when equipped with the proper filter or cartridge.A

Elastomeric quarter facepiece respirators cover your nose and mouth, sealing between your chin and lower lip. NIOSH has approved these respirators with and without exhalation valves. Elastomeric quarter facepiece respirators without exhalation valves only provide particulate protections (e.g., N95^® or P100^® protections).B

Elastomeric half mask

EHMRs are reusable devices with exchangeable cartridges or filters. The facepieces are made of synthetic or natural rubber material that allow repeated cleaning, disinfection, storage, and reuse. The facepiece of an EHMR must form a tight seal against your face, covering your nose and mouth.

EHMRs typically have exhalation valves, but some are designed without an exhalation valve or with an exhalation valve filter. EHMRs with an exhalation valve or an exhalation valve filter can protect against gases, vapors, or particles when equipped with the proper filter or cartridge.C EHMRs without an exhalation valve are only approved for use with particulate filters. They cannot be equipped with gas or vapor cartridges.

Benefits

• Reusable
• Replaceable filter elements
• Offers at least equivalent or more protection than N95 filtering facepiece respirators (FFRs)

Potential challenges

• May interfere with communication and downward gaze
• Storage between work shifts
• Needs cleaning and disinfecting

Cleaning

When cleaning and sanitizing your EHMR, the manufacturer's guidelines should always be followed. If guidance is not included with the packaging of your respirator, check the manufacturer's website. If guidance is not available, OSHA provides .

Use in healthcare

Although more popular in industry settings, EHMRs have been used in healthcare settings during public health emergencies. EHMRs can be a good alternative when N95 FFRs are in short supply since they provide the same, or greater, level of protection.

Although, some EHMRs have an exhalation valve which should be taken into consideration before use in a sterile setting or for use as source control.

With proper use, fit, and maintenance training, EHMRs provide an effective solution to supplementing the supply of N95 FFRs.

View LargerDownload

Download English, Spanish, Arabic, Chinese, Tagalog, Vietnamese

Elastomeric full facepiece

Elastomeric full facepiece respirators are reusable devices with exchangeable cartridges, canisters, or filters. They can be used to protect against gases, vapors, and particles if equipped with the appropriate filters, cartridges, or canisters.

Elastomeric full facepiece respirators are made of rubber or silicone and have a clear plastic lens that covers the face and provides eye protection. Since they cover the face and eyes, they can also be used to protect against liquid splashes and irritating vapors. These respirators tend to provide a more reliable face seal than FFRs or EHMRs.

Resources

Blogs

MultiVapor^TM

MultiVapor™ is a computer tool for estimating breakthrough times and service life of air-purifying respirator cartridges manufactured to remove toxic organic vapors from breathed air.D E

It can also be used for larger filters and for carbon beds of any size prepared for laboratory studies.

MultiVapor 2.2.5 was updated in June 2018. This latest version incorporates 26 new compounds, including CN, HDMI, and MMA. The library now contains over 750 compounds.

A breakthrough time is the time following the first and continuous use of a cartridge after which the user of the cartridge could be exposed to a selected concentration of a harmful vapor. This is the consequence of the cartridge being used up. Service life is the breakthrough time with, possibly, a safety factor applied.

Please note: In April 2024, MultiVapor™ was updated to resolve the errors users experienced with a missing MSSTDFMT.DLL file, and other minor typographical errors. Additionally, due to the dated nature of this program, Version 2.2.5 will still be reflected when downloading and opening the software.