Automotive — Combined air filters are required for many of the processes in the production of automobiles, including combined air filter for paint application, fluid filtration for coatings, solvents, oils and deionised water, and molecular filtration for breathing air supply and VOC abatement.

Bio-parmaceutical — Bio-pharmaceutical research and manufacturing involves the maintenance of sterile environments to eliminate exposure of products to viable and non-viable contamination. Combined air filter plays an important role in this growing industry.

Microelectronics — The manufacture of microelectronic devices, including microchips and LCD displays, requires extremely clean environments for successful research and development and for manufacturing commercial products. The use of combined air filter is common in this industry.

Museums — Combined air filter, including particulate and molecular or chemical filtration, plays an important role in the conservation of museum artifacts. Contaminants in the air can deteriorate the materials which compose items in the collections.