| Business | Phone |
| Service King Inc 2675 W Hidden Glen Dr, Waukegan 60085 | (847) 244-3541 |
| O'Brien Heating & Cooling 3128 Sheeler Ave, Waukegan 60085 | (847) 662-5136 |
| Olson Comfort Svc 1402 W Dugdale Rd, Waukegan 60085 | (847) 336-9200 |
| Northeast Illinois Heating 236 N Genesee St, Waukegan 60085 | (847) 623-6700 |
| Green Mechanical Inc 919 Low Ave, Waukegan 60085 | (847) 263-1908 |