| Business | Phone |
| Dometic Environmental Corp 2320 Industrial Pkwy, Elkhart 46516 | (574) 291-2511 |
| Mtg Air 53042 Faith Ave, Elkhart 46514 | (574) 266-7100 |
| Pro Air Llc 28731 County Road 6, Elkhart 46514 | (574) 264-5494 |
| Twin Air Products 4602 Chester Dr, Elkhart 46516 | (574) 295-1129 |