How Effective Are Gas Masks
A gas mask is a form of personal protective equipment (PPE) that covers the face and can protect the wearer from inhaling airborne pollutants and toxic gases. It consists of a mask that fits over the nose and mouth, a filter to remove harmful substances, and possibly a harness to support the weight of the device and make it easier to wear for extended periods of time.
Some people with breathing disorders, such as asthma or emphysema, may not be able to use a gas mask, even with modifications. People with claustrophobia also may not be able to wear a gas mask. In addition, people who work or exercise hard while wearing a gas mask can become overheated and uncomfortable quickly.
The effectiveness of a mask depends on the size and type of aerosol particles, the respirator’s filtration efficiency, and its fitness. A regular analysis of these factors can help to develop a model that will improve the filtration efficiency of gas masks and their future development trends.
Activated carbon filters can be added to some masks to reduce odours and add extra protection. They are usually inexpensive and don’t add much to the respirator’s breathing resistance. Cartridges and filters can have a limited life and should be stored in air-tight packages. The mask itself should be kept in a clean and dry place, not exposed to extreme heat or cold and inspected regularly. Some types of masks, such as self-contained breathing apparatus (SCBA), don’t require filter cartridges and have their own air tanks, but they are very heavy (30 pounds or more) and require special training to use and maintain.