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AAAmachine Inc.
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AAF International (American Air Filter)
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ACO Co., Ltd.
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Airotech Environmental Inc.
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Bel Tech Engineering & Associates, Inc.
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Boyne Area Manufacturing (BAM)
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Clean Gas Systems, Inc.
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Evaporator Dryer Technologies Inc.
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Filter Technology Ltd.
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Fisher-Klosterman, Inc.
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Kavon Filter Products Co., Inc.
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Martin Engineering
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McGill AirClean LLC
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Met-Pro Environmental Air Solutions - Duall
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Monroe Environmental Corp.
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Sly Inc.
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Spencer Turbine Co.
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Tri-Mer Corp.
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