| Business | Phone |
| Hammond Heating & Air Cond 647 E State St, Hammond 46320 | (219) 937-2665 |
| John's Heating & Cooling 3510 174th Pl, Hammond 46323 | (219) 845-7444 |
| King's Plumbing & Air Cond 4234 S Hohman Ave, Hammond 46327 | (219) 659-6650 |
| Kuppinger Air Conditioning Hammond 46324 | (219) 844-7786 |