| Business | Phone |
| All-Temp Equipment Inc 5 Terrace Acres Pkwy, Michigan City 46360 | (219) 874-1349 |
| City Heating & Cooling Inc 702 Freyer Rd, Michigan City 46360 | (219) 872-8009 |
| Dennison Engineering Inc 1115 Franklin St, Michigan City 46360 | (219) 872-2474 |
| Joseph Heating & Air Cond Michigan City 46360 | (219) 898-3564 |
| Kurt's Heating & Air Cond Michigan City 46360 | (219) 874-6735 |
| Lakeshore Mechanical Inc 234 E 2nd St, Michigan City 46360 | (219) 879-8825 |
| Paniccia Heating & Cooling 5076 N Bleck Rd, Michigan City 46360 | (219) 872-2198 |