| Business | Phone |
| Absolute Air 1716 Hofheinz St # 8, San Marcos 78666 | (512) 392-4523 |
| AirOne Air Conditioning 2700 Hunter Rd A, San Marcos 78666 | (512) 392-0022 |
| Aire Serv Heating & Air Cond 2001 Clovis Barker Rd, San Marcos 78666 | (512) 353-0143 |
| Alpha & Omega Heating & Ac 334 Craddock Ave, San Marcos 78666 | (512) 396-0477 |
| Apex Mechanical 4105 Hunter Rd, San Marcos 78666 | (512) 395-8556 |
| C A Woods Air Conditioning San Marcos 78666 | (512) 396-4790 |
| C A Woods Co Inc 4105 Hunter Rd 20, San Marcos 78666 | (512) 805-0676 |
| Dan's Refrigeration Air Cond 317 Linda Dr, San Marcos 78666 | (512) 353-1031 |
| Danco A/C Heat & Appliance 504 Lazy Ln, San Marcos 78666 | (512) 353-7468 |
| Durham Service Co 517 Nw Hills Rd, San Marcos 78666 | (512) 353-8217 |
| Finch Mechanical Contractors 138 S Lbj Dr, San Marcos 78666 | (512) 396-1717 |
| G M Mechanical 310 Bunnyrun Ln, San Marcos 78666 | (512) 396-2383 |
| H C Svc Oakwood Hls, San Marcos 78666 | (512) 396-3838 |
| Marvin's Heating & Air Cond 107 Manor Park Rd, San Marcos 78666 | (512) 396-4791 |
| Quality Air & Refrigeration 500 Hull St, San Marcos 78666 | (512) 353-3375 |
| Reliable Air 4702 Highway 123 C, San Marcos 78666 | (512) 396-8183 |
| San Marcos Air Conditioning 3500 Highway 123, San Marcos 78666 | (512) 353-2511 |