| Hastings Filters Inc (Kearney, NE)
|
| Healthquest Technologies (McDonough, GA)
|
| Heartland Technologies Inc (Fishers, IN)
|
| Hepa Corp (Anaheim, CA)
|
| Hunt Engine Inc (Houston, TX)
|
| Hydro-Air of Minn Inc (Minneapolis, MN)
|
| Hyland Filter Svc (Louisville, KY)
|
| Indoor Environmental Solutions (Houston, TX)
|
| Industrial Filtration Inc (Long Beach, CA)
|
| International Decontamination (Elgin, IL)
|
| International Filter Mfg Corp (Litchfield, IL)
|
| Itw Filtration Products (Tinley Park, IL)
|
| J & M Heating & Cooling Inc (North Port, FL)
|
| Janet's 24 Hour Svc (Saint Paul, MN)
|
| Just Breathe Enterprises (Corona, CA)
|
| Keltec Inc (Twinsburg, OH)
|
| Kirk & Blum Mfg Co (Louisville, KY)
|
| Koch Filter Corp (Louisville, KY)
|
| Kronos Advanced Technologies (Belmont, MA)
|
| L M Air Technology (Rahway, NJ)
|
| Lennox Industries Inc (Salt Lake City, UT)
|
| Linc Services (Houston, TX)
|
| Linweld (Estherville, IA)
|
| Lunberg & Assoc Ltd (Davison, MI)
|
| Mann & Hummel Hydromation (Louisville, KY)
|
