| Business | Phone |
| Bratcher Heating & Air Cond 1210 Fort Jesse Rd, Normal 61761 | (309) 454-1611 |
| Killian's Heating & Cooling Po Box 218, Normal 61761 | (309) 862-4822 |
| Mike Tinsley Heating & Air 1406 W Hovey Ave, Normal 61761 | (309) 452-8925 |
| U S Mechanical Svc 1805 W Hovey Ave, Normal 61761 | (309) 452-0092 |
| Schulz Heating & Cooling 301 Carriage Hills Rd, Normal 61761 | (309) 454-7036 |
| Siemens Building Technologies 2012 W College Ave 124, Normal 61761 | (309) 454-8992 |