| Business | Phone |
| American Heating & Cooling 715 N Lillian St, Mchenry 60050 | (847) 587-1790 |
| Aero Forze Htg & Cooling Inc 3908 W Elm St, Mchenry 60050 | (815) 344-9393 |
| Tri Star Heating & Ac 5415 Lucina Ave, Mchenry 60050 | (847) 497-9768 |
| Carl Woerner Heating & Cooling 3511 S Wright Rd, Mchenry 60050 | (815) 459-2300 |
| Sunnyside Heating Air Cond 4803 Promontory Ln, Mchenry 60050 | (815) 363-7609 |
| Comfort Doctors Inc 706 W Pheasant Trl, Mchenry 60050 | (847) 497-9000 |
| Donegan Comfort Air & Appl Mchenry 60050 | (847) 497-9003 |
| Dowe & Wagner Heating & Air 542 Rand Rd, Mchenry 60051 | (815) 385-0468 |
| Koch Indoor Weather 709 Cherry Valley Rd, Mchenry 60050 | (815) 385-7461 |