| Business | Phone |
| American Air & Mechanical Svc 2010 Dorchester Ave, Algonquin 60102 | (847) 658-2092 |
| Steve Wojas Heating & Air Cond Algonquin 60102 | (847) 658-6724 |
| Schwartz Heating Algonquin 60102 | (847) 658-6800 |
| Epp's Custom Heating & Ac Algonquin 60102 | (847) 854-8868 |
| Norwood Mechanical 1405 Gaslight Dr, Algonquin 60102 | (847) 658-7096 |
| J M Svc 434 Hillcrest Dr, Algonquin 60102 | (847) 854-0362 |