| Business | Phone |
| Air Force 5605 N Austin Ave, Chicago 60646 | (773) 339-5566 |
| Air-Care Refrigeration 4948 N Neenah Ave, Chicago 60656 | (773) 763-0355 |
| All Climates South Heating Chicago 60629 | (773) 471-4100 |
| All Seasons Heating & Cooling 10045 S Vernon Ave, Chicago 60628 | (773) 568-5307 |
| Amcon Inc 4583 N Elston Ave, Chicago 60630 | (773) 685-5252 |
| Appleton Home Svc Po Box 551, Chicago 60690 | (708) 868-6074 |
| B & G Svc Co 3950 N Elston Ave, Chicago 60618 | (773) 588-2290 |
| B & L Heating & Air Cond 7634 S Loomis Blvd, Chicago 60620 | (773) 846-8063 |
| George E Quill & Sons Inc 3655 S Iron St, Chicago 60609 | (773) 927-4500 |
| G & G Heating & Cooling Co 2056 W Walnut St, Chicago 60612 | (773) 736-4477 |
| Burnham Cool Heat Inc 13848 S Torrence Ave, Chicago 60633 | (708) 730-1700 |
| Cnk Svc Co 1611 N Elston Ave, Chicago 60622 | (773) 282-4785 |
| Dana Refrigeration & Air Cond 2817 W Diversey Ave, Chicago 60647 | (773) 489-7400 |
| D & P Mechanical Inc 6853 W 60th Pl, Chicago 60638 | (773) 229-1026 |
| Chicago Air Conditioning and Heating Repair 2101 West Irving Park Road, Chicago 60618 | (312) 602-9688 |