The cloud of ash spewed into the atmosphere consists mainly of minerals of small particles and water vapor.

With ash from the Iceland volcano still affecting air travel around the world, filter maker Camfil Farr is advising caution.

Although it is too soon to know if areas outside of Europe will be impacted, company officials point out that small particles that fly far from the eruption site could impact air quality and health worldwide.

The company recommends that air filters with minimum efficiency values of 13 or higher be used to keep particles out of air-handling units. Also check the units more frequently and change any clogged filters.