| Business | Phone |
| Combustion Systems Inc 5701 W Minnesota St, Indianapolis 46241 | (317) 390-1100 |
| Weingardt & Assoc Inc 9265 Castlegate Dr, Indianapolis 46256 | (317) 570-6161 |
| Noonan Mechanical Sales Inc 8212 Madison Ave, Indianapolis 46227 | (317) 888-4229 |
| M G Sales 555 Pine Dr, Indianapolis 46260 | (317) 848-4720 |