| Business | Phone |
| Top Shelf Heating, Cooling and Geothermal 5265 E. 82ND St. Suite 155, Indianapolis 46250 | (317) 220-6896 |
| Efficient Systems, Inc. 284 North Belmont Avenue, Indianapolis 46222 | (317) 293-6510 |
| J & M Air Conditioning & Heating 395 West Esplanade Avenue, Indianapolis 92583 | (951) 654-3464 |
| A Comfortable Climate 5602 E. Elmwood Ave Suite 118, Indianapolis 46203 | (317) 783-2370 |