| Item | Equipment Life | Years |
|---|---|---|
| Air Conditioners | Residential Through-the-wall Water Cooled Computer Room |
15 15 15 15 |
| Heat Pumps | Air to Air Water to Air |
12 19 |
| Commercial Package | Single Zone Multi Zone |
15 15 |
| Boilers | Steel Water-tube Cast Iron Electric |
24 30 15 |
| Furnaces | 18 | |
| Unit Heaters | 18 |