| Business | Phone |
| Air & Gas Svc 5829 W Sam Houston Pkwy N, Houston 77041 | (832) 467-4620 |
| Air & Gas Systems Inc 5829 W Sam Houston Pkwy N 108, Houston 77041 | (832) 467-9955 |
| Lamson-Gardner Denver Blowers 3723 Aberdeen Way, Houston 77025 | (713) 660-8000 |
| Houston Service Industries 7901 Hansen Rd, Houston 77061 | (713) 947-1623 |