| Bullet / Blast Resistant |
| Armortex | http://www.armortex.com |
| Electric Heating |
| Electro Plastics, Inc. | http://www.warmfloor.com |
| Electric Heating |
| SSHC, Inc. | http://www.sshcinc.com |
| Insulated |
| Dynasonics | http://www.dynasonics-acoustics.com |
| Insulated |
| Erickson Industries, Inc. | http://www.erickson-industries.com |
| Insulated |
| Forma-Kool Mfg., Inc. | http://www.formakool.com |
| Insulated |
| Ruskin Co. | http://www.ruskinsound.com |
| Insulated |
| Scott Mfg., Inc. | http://www.scottind.com |
| Insulated |
| SEMCO Inc. | http://www.semcoinc.com/ |
| Insulated |
| Spiral Pipe of Texas, Inc. | http://www.spotusa.com |
| Perforated | Air Diffusion | Tuttle & Bailey / Hart & Cooley | http://www.tuttleandbailey.com |