| Business | Phone |
| Brooks Heating & Cooling 8804 Summer Rd, Columbia 62236 | (618) 939-3232 |
| Comfort Air Cond & Htg Columbia 62236 | (618) 281-5554 |
| D & S Heating & Cooling 634 N Main St, Columbia 62236 | (618) 281-5575 |
| Earl Inman Heating & Cooling 204 S Breidecker St, Columbia 62236 | (618) 281-5355 |
| Greenfield's Heating & Cooling 310 N Main St, Columbia 62236 | (618) 281-4571 |
| K 1 Svc 409 W Olympia St, Columbia 62236 | (618) 281-4875 |