| Business | Phone |
| A & S Heating & Cooling 6556 S Kedzie Ave, Chicago 60629 | (773) 778-4007 |
| A & W Construction Inc Chicago 60613 | (773) 447-8392 |
| A Aabal Heating & Air Cond 8518 S Ashland Ave, Chicago 60620 | (773) 375-5555 |
| A Consumer Heating & Cooling 8128 S Western Ave, Chicago 60620 | (773) 778-4444 |
| A-Aabal Cooling & Heating 8518 S Ashland Ave, Chicago 60620 | (708) 423-2270 |
| A-Temperature 2437 N Kostner Ave, Chicago 60639 | (773) 908-4037 |
| Aaron Heating & Cooling 4108 N Pulaski Rd, Chicago 60641 | (773) 283-2000 |
| Action Heating & Air Cond Co 3315 N Harlem Ave, Chicago 60634 | (773) 282-1155 |
| Drehobl 5408 N Milwaukee Ave, Chicago 60630 | (773) 545-8222 |
| Airmaster Inc 5007 W Lawrence Ave, Chicago 60630 | (773) 205-5669 |
| All American Heating & Cooling 10645 S Whipple St, Chicago 60655 | (773) 881-8426 |
| All City Heating & Cooling Svc 5619 W 63rd St, Chicago 60638 | (773) 582-0032 |
| All Right Htg & Ac 2909 W Farragut Ave, Chicago 60625 | (773) 561-3949 |
| All Temp Chicagoland Htg & Ac 4363 W Montrose Ave, Chicago 60641 | (773) 481-2000 |
| All Temperature Heating 3229 W Hirsch St, Chicago 60651 | (773) 276-1175 |
| All-Temp Chicagoland Heating 4363 W Matros, Chicago 60641 | (773) 284-5500 |
| Althoff Industries 935 W Chestnut St 205, Chicago 60622 | (312) 332-5700 |
| America United 1834 N Damen Ave, Chicago 60647 | (773) 221-7800 |
| American Climate Corp 7113 N Western Ave, Chicago 60645 | (773) 973-7040 |
| Amw Heating & Ac Chicago 60614 | (773) 424-5094 |
| Anderson Brothers Heating Chicago 60641 | (773) 205-4225 |
| Appliance Son 5053 N Lowell Ave, Chicago 60630 | (773) 231-9600 |
| Atlas Mechanical Inc Chicago 60639 | (773) 637-6900 |
| Bartley's Heating & Ac Co 3942 N Hamilton Ave, Chicago 60618 | (773) 935-6050 |
| Giant Mechanical Inc 4315 N Elston Ave, Chicago 60641 | (773) 539-9629 |
| Bob's Refrigeration Inc 2906 W Touhy Ave, Chicago 60645 | (773) 465-8400 |
| Four Season Heating & Ac 4102 N Pulaski Rd, Chicago 60641 | (773) 384-3100 |
| Four Seasons Htg & Ac 6510 S Lavergne Ave, Chicago 60638 | (773) 483-0094 |
| Four Seasons Htg & Ac 7224 W Duvan Dr, Chicago 60638 | (708) 754-2100 |
| C & J Berrys Heating & Cooling 10448 S Eggleston Ave, Chicago 60628 | (773) 298-0159 |
| Carrysa Inc 4377 W 26th St, Chicago 60623 | (773) 762-9090 |
| Cascade Heating & Air 4171 N Milwaukee Ave, Chicago 60641 | (773) 283-5040 |
| Charon Refrigeration 2802 W Taylor St, Chicago 60612 | (773) 533-0679 |
| Chicago Climate Control Inc 6309 W Belmont Ave, Chicago 60634 | (773) 889-5030 |
| Chicago Cooling Corp 2728 N Elston Ave, Chicago 60647 | (773) 276-5000 |
| E & E Contractors 9756 S Prospect Ave, Chicago 60643 | (773) 238-0195 |
| Discovery Heating & Cooling 13343 S Brandon Ave, Chicago 60633 | (773) 646-2440 |
| Citywide Air Conditioning Chicago 60628 | (773) 925-6771 |
| Deljo Heating & Cooling 2700 N Campbell Ave, Chicago 60647 | (773) 248-1144 |
| Climatemp Service Co Llc 2225 W Hubbard St, Chicago 60612 | (312) 492-1980 |
| De Soto Htg & Cooling Instltn 5115 S Millard Ave, Chicago 60632 | (773) 284-6882 |
| Comfort Solutions 5231 S Nordica Ave, Chicago 60638 | (773) 586-0520 |
| Commonwealth Heating & Air 5934 W Lawrence Ave, Chicago 60630 | (773) 205-2880 |
| Daughter's Heating & Cooling 12762 S Lowe Ave, Chicago 60628 | (773) 568-1431 |
| Complete Relief Chicago 60626 | (773) 508-0557 |
| Conservative Heating & Ac Inc 3785 W Belmont Ave, Chicago 60618 | (773) 286-3535 |
| D & M Mechanical Svc 741 W Garfield Blvd, Chicago 60621 | (773) 983-6061 |
| Controlled Temperature Inc 9241 S Stony Island Ave, Chicago 60617 | (773) 721-0400 |
| Cook County Heating 13256 S Baltimore Ave, Chicago 60633 | (773) 646-6633 |
| Custom Environmental Inc 6914 N Olcott Ave, Chicago 60631 | (773) 774-9899 |
| Corrigan Heating & Air Cond 7214 S Western Ave, Chicago 60636 | (773) 436-0300 |
| Cosmos Corp 5004 N California Ave, Chicago 60625 | (773) 334-2139 |
| andreyhvac 1242 N Maplewood, Chicago 60622 | (773) 455-7377 |
| Better Air Chicago 233 S. Wacker Drive, 84th Floor, Chicago 60606 | (312) 765-7485 |