| Business | Phone |
| Clean Energy Technologies 5420 Lyndon B Johnson Fwy, Dallas 75240 | (972) 982-8340 |
| Proenergy 12160 Abrams Rd, Dallas 75243 | (972) 235-0022 |
| Quality Conservation Svc 2750 Northaven Rd, Dallas 75229 | (469) 916-6600 |
| Republic Energy Inc 4925 Greenville Ave 1050, Dallas 75206 | (214) 369-4800 |
| Environmental Engineered Equip 9852 Monroe Dr, Dallas 75220 | (214) 358-2500 |
| Heat Harvester 2831 Nagle St, Dallas 75220 | (214) 358-2500 |
| Geoffrey Howland Of Honeywell 14350 Proton Rd, Dallas 75244 | (469) 791-9159 |
| Ier Intl Energy Resources 3839 Briargrove Ln 6307, Dallas 75287 | (972) 662-9070 |