Michigan

Detroit THERMAL-NETICS, INC. CosaTron Contact - Jim Newman 3955 Pinnacle Court Auburn Hills, MI 48326 PHONE: 248-276-3300 FAX: 248-276-3301 E-Mail: info@thermalnetics.com WWW: http://www.thermalnetics.com

Grand Rapids & Kalamazoo CARRIER/AIR ENGINEERING CosaTron Contact - Jim Knott 400 76th Street SW Suite 14 Grand Rapids, MI 49315 PHONE: 616-583-1600 FAX: 616-583-1262 E-Mail: jimknott@carrier.utc.com

Northwestern AIR TECHNOLOGIES, INC. CosaTron Contact - Ben Radoszewski 130 E. Fox Dale Road Milwaukee, WI 53217 PHONE: 414-228-4887 FAX: 414-228-5260 E-Mail: AirTechnologiesInc@ameritech.net WWW:

Flint THERMAL-NETICS, INC. CosaTron Contact - Cory Peterson 4488 Bristol Road Flint, MI 48507-3134 PHONE: 810-244-7501 FAX: 810-244-7502 E-Mail: coryp@thermalnetics.com WWW: http://www.thermalnetics.com

Northeastern CARRIER/AIR ENGINEERING & COND. CO. CosaTron Contact - Jim Knott 400 76th Street SW Suite 14 Grand Rapids, MI 49315 PHONE: 616-245-8000 FAX: 616-245-6453 E-Mail: jim.knott@carrier.utc.com