The following information is provided by Freddie Mac, and provides a rough guide for estimating the normal life of various household components.
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| Dishwashers | 5 to 12 |
| Disposals | 5 to 12 |
| Washers and dryers | 8 to 12 |
| Water heaters | 8 to 12 |
| Refrigerators | 15 to 20 |
| Stoves | 15 to 20 |
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| Galvanized | 15 to 20 |
| Copper | Life of home if well-maintained |
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| Warm air furnace | 8 to 12 |
| Heat pumps | 8 to 12 |
| Air conditioning compressors | 8 to 15 |
| Gas chillers | 8 to 15 |
| Hot water boilers | 30 to 50 |
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| Gas or electric water heater | 10 |
| Private disposal systems (septic) | 15 to 25 |
| Galvanized water pipes | 30 to 50 |
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| Selvage or asphalt roll | 12 to 20 |
| Wood shake and shingle | 15 to 20 |
| Asphalt | 15 to 20 |
| Fiberglass | 15 to 20 |
| Asbestos shingle | 30-50 |
| Slate | 40-75 |
© 1995-2000 Freddie Mac. All rights reserved.
Reproduced with permission from Freddie Mac.
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