| Business | Phone |
| A & D Precision Heating 3436 N Nordica Ave, Chicago 60634 | (773) 777-1472 |
| A & M Heating & Cooling Svc 2624 N Albany Ave, Chicago 60647 | (773) 292-1313 |
| A & P Svc 2814 W North Ave, Chicago 60647 | (773) 862-1335 |
| A & T Htg & Air Conditioning 2066 N Western Ave, Chicago 60647 | (773) 489-7060 |
| A A Zayed Heating & Cooling 8026 S Kolmar Ave, Chicago 60652 | (773) 581-2499 |
| A Brooks Heating & Cooling 12107 S Elizabeth St, Chicago 60643 | (773) 291-0900 |
| A Calabrese Heating Cooling 742 N Damen Ave, Chicago 60622 | (312) 421-5933 |
| A Climate Source Inc 5304 N Spaulding Ave, Chicago 60625 | (773) 463-8994 |
| A Custom Heating & Air Cond 2929 N Neenah Ave, Chicago 60634 | (773) 889-7660 |
| A Day & Night Heating 3461 S Archer Ave, Chicago 60608 | (773) 254-1515 |
| A Day & Night Heating & Engrng 3260 W Irving Park Rd, Chicago 60618 | (773) 267-5808 |
| A Heating Co Chicago 60619 | (773) 224-0474 |
| A James Heating Co 8128 S Western Ave, Chicago 60620 | (773) 778-6050 |
| A P Heating & Ac 6048 W Irving Park Rd, Chicago 60634 | (773) 777-8404 |
| A Professional Heating & Clng Chicago 60653 | (773) 373-3626 |
| A Professional Htg & Cooling 4750 N Milwaukee Ave, Chicago 60630 | (773) 594-2300 |
| A Professional Htg & Cooling 6715 S Pulaski Rd, Chicago 60629 | (773) 585-0358 |
| A Proficient Heating & Air 3512 W 76th St, Chicago 60652 | (773) 737-7644 |
| A-1 Rios Refrigeration 3251 N Troy St, Chicago 60618 | (773) 588-7771 |
| A-A Mechanical 1858 N Oakley Ave, Chicago 60647 | (773) 782-4314 |
| A-Aabal Cooling & Heating 8518 S Ashland Ave, Chicago 60620 | (773) 224-7212 |
| A-Comfort Zone Heating & Air Chicago 60647 | (773) 704-3949 |
| Aaa Archer Heating & Air Svc 5350 S Archer Ave, Chicago 60632 | (773) 586-5000 |
| Aaral Heating & Air Cond 4558 S Archer Ave, Chicago 60632 | (773) 376-7188 |
| Aarand Heating & Air Cond Chicago 60636 | (773) 918-1303 |
| A Aberdeen Heating & Air Cond 4558 S Archer Ave, Chicago 60632 | (773) 890-1786 |
| Action Heating 3745 N Cicero Ave, Chicago 60641 | (773) 685-7900 |
| Adams Boiler & Furnace Works 10918 S Western Ave, Chicago 60643 | (773) 779-7998 |
| Addit Heating & Air Cond 1456 N Dayton St, Chicago 60622 | (312) 943-8461 |
| Advanced Comfort Systems Chicago 60639 | (773) 237-9800 |
| Aero-Mechanical 5772 W Higgins Ave, Chicago 60630 | (773) 865-9433 |
| Affordable Heating & Cooling 6348 W Gunnison St, Chicago 60630 | (773) 777-5884 |
| Heatworks Heating & Air Cond 5007 W Lawrence Ave, Chicago 60630 | (773) 481-9700 |
| Airko Heating 5215 S Archer Ave, Chicago 60632 | (773) 767-9220 |
| Insureone 6640 S Cicero Ave, Chicago 60638 | (773) 931-1180 |
| Airon Heating Airconditioning 3715 W Belmont Ave, Chicago 60618 | (773) 604-8880 |
| Airport Heating & Cooling 4154 W 63rd St, Chicago 60629 | (773) 582-0044 |
| Airway Air Conditionng & Plmb 1822 N Milwaukee Ave, Chicago 60647 | (773) 637-1212 |
| Ajax Heating & Cooling 4558 S Archer Ave, Chicago 60632 | (773) 890-0042 |
| All American Construction Svc 1140 E 81st Pl # 1w, Chicago 60619 | (773) 221-9767 |
| All Seasons Heating & Cooling 7924 S Ashland Ave, Chicago 60620 | (773) 488-5510 |
| All-Temp Chicagoland Heating 114 S Racine Ave, Chicago 60607 | (773) 284-5500 |
| Always Heating & Cooling 2033 E 93rd St, Chicago 60617 | (773) 374-2770 |
| Always Heating & Cooling 6055 W Irving Park Rd, Chicago 60634 | (773) 545-2040 |
| Amber Heating & Cooling 2652 N Mobile Ave, Chicago 60639 | (773) 286-3214 |
| Amr Heating & Cooling 400 W 76th St, Chicago 60620 | (773) 723-8388 |
| Ams Refrigeration Inc 6517 S Kedzie Ave, Chicago 60629 | (773) 778-6456 |
| Apex Energy 2909 N Sheridan Rd, Chicago 60657 | (773) 319-8812 |
| Apollo Heating & Cooling 4552 S Kedzie Ave, Chicago 60632 | (773) 778-1996 |
| Artic Heating Chicago 60629 | (773) 284-2990 |
| B & R Cooling & Heating Co 4750 N Milwaukee Ave, Chicago 60630 | (773) 334-2255 |
| Giant Refrigeration Heating 4317 N Elston Ave, Chicago 60641 | (773) 539-9629 |
| Belmont Heating & Air Cond 4505 N Western Ave, Chicago 60625 | (773) 777-5797 |
| Berger Heating Co 2149 W Irving Park Rd, Chicago 60618 | (773) 463-6016 |
| Besco Heating & Air Cond 5805 W Diversey Ave, Chicago 60639 | (773) 889-0122 |
| Best Refrigeration Inc 2910 W Peterson Ave, Chicago 60659 | (773) 743-1117 |
| Bhur Inc 5439 S Aberdeen St, Chicago 60609 | (773) 268-4318 |
| Garco Enterprises Inc 315 N May St, Chicago 60607 | (312) 666-4447 |
| Gem Engineering Heating 4823 N Seeley Ave, Chicago 60625 | (773) 728-5789 |
| G Mc Grath & Son Heating & Ac 6014 S Kolmar Ave, Chicago 60629 | (773) 476-8400 |
| Brighton Heating & Cooling 6010 S Kedzie Ave, Chicago 60629 | (773) 278-2800 |
| Brighton Heating & Cooling Rr 2, Chicago 47553 | (812) 295-4217 |
| Broman Heating Inc 2812 N Kilpatrick Ave, Chicago 60641 | (773) 545-5524 |
| Freeman Heating & Cooling Chicago 60629 | (773) 585-2790 |
| Bullseye Heating & Air Cond 7855 S Kolmar Ave, Chicago 60652 | (773) 581-5598 |
| Burns Heating & Air Cond 616 S Kolmar Ave, Chicago 60624 | (773) 533-9153 |
| Burris & Sons Inc 7850 S Colfax Ave, Chicago 60649 | (773) 375-4123 |
| By-George Svc Chicago 60638 | (773) 586-4999 |
| C & P Heating & Maintenance 5007 W Lawrence Ave, Chicago 60630 | (773) 286-4949 |
| Fogell Heating & Cooling 1331 W Chase Ave, Chicago 60626 | (773) 384-2233 |
| Flame Furnace 10450 S Saint Louis Ave, Chicago 60655 | (773) 779-6988 |
| Flame Heating & Air Cond 6251 W Waveland Ave 2, Chicago 60634 | (773) 736-4001 |
| Flash Heating & Cooling 4907 W Fullerton Ave, Chicago 60639 | (773) 804-9084 |
| Fabian & Son 2127 N Winchester Ave, Chicago 60614 | (773) 671-8460 |
| Even Air 5016 W Foster Ave, Chicago 60630 | (773) 205-0010 |
| Certified Heating & Cooling 2645 W 79th St, Chicago 60652 | (773) 247-4441 |
| Certified Heating & Cooling 5301 N Central Ave, Chicago 60630 | (773) 355-5511 |
| Emanuel Brothers Htg & Cooling 6021 W Addison St, Chicago 60634 | (773) 286-8050 |
| Emf Temperature Control 5745 W 63rd St, Chicago 60638 | (773) 735-6040 |
| Charles Heating & Air Cond 6611 S Kostner Ave, Chicago 60629 | (773) 767-7265 |
| Chicago Auto Heating 11041 S Emerald Ave, Chicago 60628 | (773) 995-0549 |
| Chicago Conditionaire Co 7625 S Kedzie Ave, Chicago 60652 | (773) 436-7200 |
| Chicago Control & Supply Inc 4925 W Fullerton Ave, Chicago 60639 | (773) 889-7000 |
| Edwards Heating & Cooling 2876 S Archer Ave, Chicago 60608 | (773) 247-5075 |
| Eismueller & Sons Inc 2659 N Narragansett Ave, Chicago 60639 | (773) 889-8686 |
| El Cunado Heating & Cooling Co 8208 S Scottsdale Ave, Chicago 60652 | (773) 735-4938 |
| Chicago Heating & Air Cond Svc 5645 W Irving Park Rd, Chicago 60634 | (773) 202-8833 |
| Chicago Mechanical Svc 3151 W 111th St, Chicago 60655 | (773) 445-1400 |
| Ed Gabriel & Sons Heating 5787 S Archer Ave, Chicago 60638 | (773) 767-4358 |
| Dwortz & Son 7321 S South Shore Dr 9e, Chicago 60649 | (773) 768-7155 |
| Duct Werks 3256 W 110th St, Chicago 60655 | (773) 474-5555 |
| Double L Heating & Cooling 4711 N Artesian Ave, Chicago 60625 | (773) 728-0773 |
| City Wide Heating & Cooling 4108 N Pulaski Rd, Chicago 60641 | (773) 283-5200 |
| Claffey Heating & Air 2236 W Lunt Ave, Chicago 60645 | (773) 743-4471 |
| Dependeable Heating Air Cond Chicago 60609 | (773) 254-7006 |
| Design Temperature 5723 N Northwest Hwy, Chicago 60646 | (773) 774-6000 |
| Devon's Heating & Air Cond 10010 S Indianapolis Ave, Chicago 60617 | (773) 768-5554 |
| Climatemp Inc 315 N May St, Chicago 60607 | (312) 829-3131 |
| Close Heating Svc 2938 W Belden Ave, Chicago 60647 | (773) 772-1561 |
| Columbia Sheet Metal Works Inc 5491 N Northwest Hwy, Chicago 60630 | (773) 774-9424 |
| Comfort Air Heating & Ac 4108 N Pulaski Rd, Chicago 60641 | (773) 427-9900 |
| Comfort Heating & Cooling Inc 3601 W Devon Ave, Chicago 60659 | (773) 539-5277 |
| Comfort Services 405 N Wabash Ave, Chicago 60611 | (312) 755-9603 |
| Comfort Zone Heating Air Cond 4032 W Irving Park Rd, Chicago 60641 | (773) 545-8280 |
| David Brothers Heating & Cool 2631 W Berwyn Ave, Chicago 60625 | (773) 784-8200 |
| Community Gas Oil-Heating Co 3759 S California Ave, Chicago 60632 | (773) 927-6664 |
| Community Heating & Air Cond 1707 N Austin Ave, Chicago 60639 | (773) 237-1888 |
| Daniel's Heating & Air Cond 5362 N Neva Ave, Chicago 60656 | (773) 467-9097 |
| D & D Heating 3432 S Oakley Ave, Chicago 60608 | (773) 925-3395 |
| Consumers Heating & Air Cond 8128 S Western Ave, Chicago 60620 | (773) 925-7779 |
| Control Heating & Cooling 3617 W North Ave, Chicago 60647 | (773) 252-7704 |
| Cool Z Heating 2319 N Sayre Ave, Chicago 60707 | (773) 637-2665 |
| Cool-Man Svc Co 3244 W Belle Plaine Ave, Chicago 60618 | (773) 478-2902 |
| Coqui Heating & Cooling Chicago 60639 | (773) 889-3333 |
| Cor X 1616 W Le Moyne St, Chicago 60622 | (773) 774-1600 |
| H & H Brothers Heating & Ac 6946 N Western Ave, Chicago 60645 | (773) 274-9930 |