| Business | Phone |
| Advanced Heating & Air Cond 5344 S Normandy Ave, Chicago 60638 | (773) 229-9930 |
| Air-Rite Heating & Cooling 2164 S Tan Ct, Chicago 60616 | (312) 842-4881 |
| Airway Heating & Cooling 1323 W 31st St, Chicago 60608 | (773) 523-9159 |
| All Professional Htg & Cooling 1043 N Kedvale Ave, Chicago 60651 | (773) 836-0451 |
| Ardmore Fresh Air 5825 N Canfield Ave, Chicago 60631 | (773) 631-9160 |
| Frank Young Supply Co 5851 S Ashland Ave, Chicago 60636 | (773) 737-5900 |
| Four Seasons Heating & Ac 5926 S Archer Ave, Chicago 60638 | (773) 482-8300 |
| C & W Heating & Air Cond Co 4421 N Christiana Ave, Chicago 60625 | (773) 279-9003 |
| D & D Heating 2522 W 45th Pl, Chicago 60632 | (773) 925-3395 |