AIRTECH EQUIPMENT INC.

2873 Marlin Court NW

Grand Rapids, MI 49544

616-534-0032

Fax: 616-534-0284

Contact: Dann Nixon, Dave DeHaan, Tim Peterson,

Jim Nora, Phil Long, Jamie Wilkinson

EAGLE ENVIRONMENTAL INC.

PO Box 1280

Okemos, MI 48805-1578

517-347-2990

Fax: 517-347-2996

Contact: Dennis Korkoske

GREAT LAKES FAN SALES CO

P.O. Box 41

Phillips, WI 54555

715-339-4110

FAX: 715-339-4131

Contact: Peter Graff