Respirators must form a seal to function properly. If yours does not form a seal against your face, then it will not protect you as well. When possible, we recommend professional fit testing of respirators.

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Some commercially available respirators have exhalation valves to make the respirator more comfortable for the person wearing it. However, the valves also allow infectious respiratory droplets to be released outside the respirator.

EN 149 is a European respirator standard. There are 3 classifications of respirators under EN 149. These are defined in terms of particulate filtration and the amount of air that can leak into the respirator during normal use ("inward leakage").

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This is important in a surgical setting because it protects health care workers from being exposed to potentially hazardous fluids during an operation.

There are different safety standards for masks and respirators. As long as a mask or respirator is labelled with 1 of the following standards or product designations, it should provide an acceptable level of protection.

Some masks and respirators are labelled for surgical use. This means that they have been designed and tested to prevent pressurized fluid from penetrating the device.

There are other respirators certified to other international standards, such as KN95 (China) and KF94 (Korea). These respirators offer similar protection as N95 respirators, as long as they fit well and form a seal.

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In general, respirators provide better protection for you and your environment, but they must be fitted to form a seal against your face. Medical masks offer less protection for you but good protection to your environment. They also don't require a perfect fit to function well.

Learn about the types of masks and respirators available to purchase in Canada and how to choose the device that's most appropriate.

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Good quality masks and respirators are designed and tested according to specific safety standards. These standards are identified on the product's packaging or label and, in the case of some respirators, directly on the respirator.

Masks and respirators each have their own advantages and disadvantages. Being aware of these will help you choose the right device for the situation.

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The labels of respirators contain more information than the labels of medical masks. Instead of being labelled with the name of a safety standard, they are labelled with a combination of letters and numbers that specifies their performance. Typically, both the respirator and the packaging it comes in will be labelled.

FFP3 respirators provide the greatest protection (minimum 99% filtration and <2% inward leakage). These are followed by FFP2 respirators (94% and <8%) and FFP1 respirators (80% and <22%). However, FFP1 respirators still provide reliable protection for most everyday situations.

When it comes to respiratory protection, surgical masks and respirators offer the same level of protection as ordinary masks and respirators. Unless you specifically require protection from pressurized fluids, a surgical mask or respirator will not provide additional benefits from its non-surgical counterpart.

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The Canadian Standards Association (CSA) respirator standard (CAN/CSA Z94.4.1) is a Canadian equivalent to the US NIOSH respirator standard.

Respirators adhering to this standard have similar labelling requirements to NIOSH respirators, with the addition of "CA-" before the performance designation. For example, instead of "N95", the respirator will be labelled with "CA-N95".

EN 149 FFP respirators should be labelled with the manufacturer's name, FFP level, "EN 149: 2009" and whether they can be reused ("R") or not ("NR").

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The N95 designation means the respirator is not resistant to oil and can filter 0.3 μm particles with a minimum filtration efficiency of 95%.

The US National Institute for Occupational Safety and Health (NIOSH) classifies respirators according to their oil resistance and ability to filter very small particulates (0.3 μm in diameter). They're tested according to NIOSH criteria and classified and labelled with 1 of the following letter and number combinations:

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A respirator that's labelled with 1 of the following standards or product designations can protect you and your environment, as long as it fits well and forms a seal against your face.