Volcanic Ash in the Atmosphere
For further information about filters, visit: http://www.camfil.com/ From a health perspective there is information at: http://volcanoes.usgs.gov/ash/health/ http://www.ivhhn.org/ Fläkt Woods’ Mission is to supply value adding air climate products, systems and solutions that give people clean, fresh air to breathe, and provide for their comfort and safety at work or in public areas.		Volcanic eruptions release a number of contaminants to the atmosphere. Gases and particles such as SO2, H2S acid aerosols and inert particles (ash) are normally formed during eruptions. The formation and the amount of ash are different, depending on the circumstances.   In the current eruption of the Eyjafjallajokull is causing a large amount of ash creation. The cloud of ash spewed into the atmosphere consists mainly of minerals of small particles and water vapor. The further away from the volcano, the smaller the particles are. Small particles can be transported very long distances and may create problems if they settle on the earth’s surface. This will depend on the concentration and how the ash enters our breathing zone. Filters and Air Handling Units At this point it is difficult to predict exactly how the ash will impact air quality in terms of health, or how it will affect the operation and function of ventilation systems. However, it is a good idea to be observant about any increases in particle concentrations (PM 10 and PM 2.5) or other contaminants that may be spread by the eruption in the near future. It is important to check the operation and functionality of air handling units and their components frequently. In the case of high particle levels at ground level, Fläkt Woods’ main filter supplier, Camfil Farr, recommends the following actions: Use air filters of class F7 or higher to stop these particles from entering the air handling units If the air filters are clogged by the ash - you need a more frequently change of the air filters Please also keep in mind that clogged air filters might show a rapid increase in pressure drop