| Type | Style | Company Name | Link |
|---|---|---|---|
| 3M Electrical | http://www.3m.com/electrical | ||
| Delta-Therm Corp. | http://www.delta-therm.com/ | ||
| Nelson Heat Trace | http://www.nelsonheaters.com | ||
| Ogden Mfg. Co. | http://www.ogdenmfg.com | ||
| PermAlert ESP, Inc. | http://www.permalert.com | ||
| Perma-Pipe Inc. | http://www.permapipe.com | ||
| Trasor Corp. | http://www.trasor.com | ||
| Tyco Thermal Controls | http://www.tycothermal.com |