| Business | Phone |
| Denver Southwest 7150 Business Park Dr 100, Houston 77041 | (713) 896-8000 |
| Eco Air 1331 Seamist Dr, Houston 77008 | (713) 868-5959 |
| Mineral Products Of Texas 2005 Turning Basin Dr 600, Houston 77029 | (713) 678-4477 |
| General Insulation Co Inc 1221 N Post Oak Rd, Houston 77055 | (713) 681-4700 |
| Manrigo Thermal Insulation Mfg 2119 Maurine St, Houston 77039 | (281) 987-8010 |
| Hep Sales Inc 14614 Falling Creek Dr 103, Houston 77068 | (281) 444-1928 |
| Koolphen Fabricators 9550 Bamboo Rd, Houston 77041 | (713) 462-7050 |
| Inspection Port Systems Inc Po Box 58960, Houston 77258 | (281) 480-4406 |
| Insul Tex 2021 Aldine Mail Rd 603, Houston 77039 | (281) 987-9911 |