| Business | Phone |
| Aeriform Corp 8350 Mosley Rd, Houston 77075 | (713) 947-5193 |
| Air Liquide America Corp 2700 Post Oak Blvd 1800, Houston 77056 | (713) 624-8000 |
| Air Products & Chemicals Inc 12600 Northborough Dr 196, Houston 77067 | (281) 873-5151 |
| Airgas Puritan Medical 2314 Naomi St, Houston 77054 | (713) 799-9004 |
| Airgas Specialty Gases 12275 Robin Blvd, Houston 77045 | (713) 433-3998 |
| Boc Gases 2200 Houston Ave, Houston 77007 | (713) 880-3681 |