| Business | Phone |
| Meyers Sheet Metal-Heat/Ac 113 E 8th St, Waterloo 50703 | (319) 234-2676 |
| Air-Tech Refrigeration 1655 Bertch Ave, Waterloo 50702 | (319) 232-5003 |
| Town & Country Plumbing & Htg 1429 Angus Dr, Waterloo 50701 | (319) 234-8899 |
| Fereday Heating & Air Cond 1010 Broadway St, Waterloo 50703 | (319) 233-8411 |
| Gubbels One Hour Heating & Ac 1717 Falls Ave, Waterloo 50701 | (319) 287-9200 |