| Business | Phone |
| Mike Fereday Htg & Ac 827 W 5th St, Waterloo 50702 | (319) 232-0900 |
| Plumbing Concepts 1727 Jefferson St, Waterloo 50702 | (319) 833-0523 |
| Gary's Heating Cooling & Plbg 1615 Garden Ave, Waterloo 50701 | (319) 226-5429 |
| Furnace Master By Harris 1321 W 4th St, Waterloo 50702 | (319) 291-2023 |