| Business | Phone |
| Allied Air Cond & Heating Corp 500 E Northwest Hwy, Palatine 60074 | (847) 359-4500 |
| Five Star Heating & Air Cond 418 N Winston Dr, Palatine 60074 | (847) 867-7979 |
| Comfort Zone Environmental 688 N Hidden Prairie Ct, Palatine 60067 | (847) 358-1684 |
| Corcoran Heating & Air Cond Palatine 60067 | (847) 705-5888 |